Superior SDDV-35 User manual

OTL Report No. 116-F-05-5
INSTALLATION
INSTRUCTIONS
Millivolt Models Electronic Models
MODELS
P/N 700,041M REV. B 11/2006
DIRECT VENT GAS FIREPLACE HEATERS
DIRECT VENT
SDDV-35/40 SERIES
SDDV-35NM
SDDV-35PM
SDDV-40NM
SDDV-40PM
SDDV-35NE
SDDV-40NE
A French manual is available upon request. Order P/N 700,041CF
Ce manuel d’installation est disponible en francais, simplement en
faire la demande. Numéro de la pièce 700,041CF.
In the Commonwealth of Massachusetts:
•Installation must be performed by a licensed plumber or
gas fitter;
• See Table of Contents for location of additional Com-
monwealth of Massachusetts requirements.
This appliance may be installed as an OEM in-
stallation in a manufactured home (USA only) or
Manufactured Home and must be installed in ac-
cordance with the manufacturer's instructions and
the manufactured home construction and safety
standard, Title 24 CPF, Part 3280 or Standard for
Installation inManufactured Homes,CAN/CSA Z240
MH. This appliance is only for use with the type(s)
of gas indicated on the rating plate. A conversion
kit is supplied with the appliance.
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
FOR YOUR SAFETY: Do not store or use gasoline
or other flammables or liquids in the vicinity of
this or any other appliance.
FOR YOUR SAFETY: What to do if you smell gas:
• DO NOT light any appliance.
• DO NOT touch any electrical switches.
• Do not use any phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow your gas suppliers
instructions.
• If your gas supplier cannot be reached, call
the fire department.
Installation and service must be performed by
a qualified installer, service agency or the gas
supplier.
WARNING:IFTHEINFORMATIONINTHISMANUAL
IS NOT FOLLOWED EXACTLY, A FIRE OR EXPLO-
SIONMAYRESULTCAUSINGPROPERTYDAMAGE,
PERSONAL INJURY OR LOSS OF LIFE.
POUR VOTRE SÉCURITÉ: Ne pas entreposer ni
utiliser d'essence ni d'autre vapeurs ou liquides
inflammables dans le voisinage de cet appareil ou
de tout autre appareil.
POUR VOTRE SÉCURITÉ: Que faire si vous sentez
une odeur de gaz:
• Ne pas tenter d'allumer d'appareil.
• Ne touchez à aucun interrupteur. Ne pas vous
servir des téléphones se trouvant dans le bati-
ment où vous vous trouvez.
• Evacuez la piéce, le bâtiment ou la zone.
• Appelez immédiatement votre fournisseur de
gaz depuis un voisin. Suivez les instructions du
fournisseur.
• Si vous ne pouvez rejoindre le fournisseur de
gaz, appelez le service dos incendies.
L'installation et service doit être exécuté par un
qualifié installeur, agence de service ou le fournis-
seur de gaz.
AVERTISSEMENT: ASSUREZ-VOUS DE BIEN
SUIVRE LES INSTRUCTIONS DONNÉ DANS CETTE
NOTICE POUR RÉDUIRE AU MINIMUM LE RISQUE
D'INCENDIE OU POUR ÉVITER TOUT DOMMAGE
MATÉRIEL, TOUTE BLESSURE OU LA MORT.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
2
TABLE OF CONTENTS
Packaging .........................................Page 2
Introduction ......................................Page 2
General Information..........................Page 2
New York City Approval.....................Page 3
Requirements for the
Commonwealth of Massachusetts.Page 4
Safety & Warning Information ..........Page 5
Cold Climate Insulation.....................Page 6
Location............................................Page 6
Manufactured Home Requirements ..Page 7
Vent Termination Clearances ............Page 7
Minimum Clearances to Combustibles..Page 9
Detailed Installation Steps.................Page 10
Typical Installation Sequence ...........Page 10
Step 1. Framing.................................Page 10
Step 2. Routing Gas Line ..................Page 10
Fireplace Specifications.....................Page 11
Step 3. Install the Venting System ....Page 13
Vertical Termination Systems............Page 14
Vent Section Length Tables...............Page 14
Vertical Vent Tables and Figures........Page 17
Horizontal Termination System .........Page 19
Horizontal Vent Tables and Figures ...Page 21
Venting Using Flexible Vent Pipe.......Page 24
Step 4. Field Wiring.........................Page 25
Step 5. Optional Blower Kit Wiring..Page 25
Step 6. Connecting Gas Line...........Page 26
Control Compartment Access ...........Page 27
Step 7. Checking Unit Operation .....Page 27
Step 8. Installing Logs ...................Page 28
Step 9. Installing Glass Door ..........Page 30
Step 10. Burner Adjustments ............Page 30
Step 11. Hood Installation.................Page 31
Finishing Requirements ....................Page 31
Installation Accessories ....................Page 32
Gas Conversion Kits .................. Page 34
This installation manual will help you obtain
a safe, efficient, dependable installation for
your appliance and vent system.
Please read and understand these
instructions before beginning your
installation.
The Millivolt appliances have a millivolt
gas control valve with piezo ignition system
which provides safe, efficient operation. If any
optional accessories that will require electrical
power are to be installed, the electrical power
must be provided at the time of appliance
installation.
The Electronic appliances have an electronic
intermittent pilot ignition system which
provides safe, efficient operation. External
electrical power is required to operate these
appliances.
PACKAGING
The assembled vented gas fireplace heater is
packaged with:
1 - One log set located in firebox area.
2 - Oneenvelopecontainingthe literaturepack-
age which consists of the homeowner's
manual, installation instructions, and war-
ranty; envelope is located in the control
compartment.
3 - One vent restrictor to be applied as shown on
Page 13;restrictor is taped to envelope.
4 - One hood located behind the top panel.
5 - Onebagofdecorativevolcanicstonelocated
in the control compartment.
6 - One bag of glowing embers located in the
control compartment. Introduction
These vented gas fireplace heaters are sealed
combustion, air circulating gas fireplaces de-
signed for residential applications.
Approved Vent Components - These fireplaces
are designed, tested and listed for operation
and installation with, the following vent com-
ponents only:
•Secure Vent™ Direct Vent System Compo-
nents,
•Secure Flex™ Flexible Vent Components
manufactured by Security Chimneys Inter-
national and
•Z-FLEX™ Model GA Venting Systems listed
to UL1777 and ULCS635 manufactured by
Flexmaster Canada Limited.
These approved vent system components are
labeledfor identification. DO NOTuse any other
manufacturer’s vent components with these
appliances. Use only the correct size venting
(4-1/2" inner & 7-1/2" outer).
These appliances comply with National Safety
Standards and are tested and listed by OMNI-
TestLaboratories,Inc. (ReportNo.116-F-05-5)
to ANSI Z21.88b-2003 (in Canada, CSA-2.33b-
2003),andCAN/CGA-2.17-M91inbothUSAand
Canada, as vented gas fireplace heaters.
Both millivolt and electronic versions of
these appliances are listed by OMNI-Test
Laboratories for installation in bedrooms
and Manufactured Homes.
Manufactured Homes -
See Manufactured Home Requirements on
Page 7 for additional information.
WARNING
Improper installation, adjust-
ment, alteration, service or
maintenance can cause injury
or property damage. Refer to
this manual. For assistance or
additional information consult
a qualified installer, service
agency or the gas supplier.
This appliance is only for use with the type
of gas indicated on the rating plate. This ap-
pliance is not convertible for use with other
gases, unless a certified kit is used.
Cet appareil doit être utilisé uniquement
avec les types de gaz indiqués sur la plaque
signalétique. Ne pas l'utiliser avec d'autres
gaz sauf si un kit de conversion certifié est
installé.
Misc. Codes / Standards -
Installation must conform to local codes. In the
absenceoflocalcodes,installationmustcomply
with the current National Fuel Gas Code, ANSI
Z223.1. (In Canada, the current CAN-1 B149
installation code).
The appliance, when installed, must be electri-
callygrounded&wired inaccordancewith local
codesor, intheabsenceof local codes, withthe
NationalElectrical Code, ANSI / NFPA70-latest
edition, or the Canadian Electrical Code, CSA
C22.1 - latest edition.
GENERAL INFORMATION
Note: Installation and repair should be per-
formed by a qualified service person. The
appliance should be inspected annually by
a qualified professional service technician.
More frequent inspections and cleanings may
be required due to excessive from carpeting,
bedding material, etc.
S'assurer que le brùleur et le compartiment des
commandes sont propres. Voir les instructions
d'installation et d'utilisation qui accompagnent
l'appareil.
Provide adequate clearances around air open-
ings and adequate accessibility clearance for
service and proper operation. Never obstruct
the front openings of the appliance.
These appliances are designed to operate on
natural or propane gas only. To operate on an
alternate gas (i.e. converting a natural gas
model to use propane gas) a field converion
is necessary (see Pages 34 to 36). The use
of any other fuels or combination of fuels will
degrade the performance of this system and
may be dangerous.
These fireplaces are designed as supplemen-
tal heaters. Therefore, it is advisable to have
an alternate heat source when installed in a
dwelling.
Millivolt Models - The millivolt appliances are
manually controlled and feature a spark igniter
(piezo) that allows the appliance's pilot gas to
be lit without the use of matches or batteries.
This system provides continued service in the
event of a power outage.
Millivolt models come standard with a manu-
ally-modulatedgasvalve;flameappearanceand
heat output can be controlled at the gas valve.
The BTU Input for these appliances is shown
in Tables 1 & 2.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. 3
New York City, New York (MEA)
Installation of these fireplaces are approved
for installation in New York City in the US state
of New York.
These appliances and their individual shut-off
valves must be disconnected from the gas
supply piping system during any pressure
testing of that system at pressures greater
than 1/2 psig (3.5 kPa).
These appliances must be isolated from the
gas supply piping system (by closing their
individual manual shut-off valve) during any
pressure testing of the gas supply piping
systemat test pressuresequal to orless than
1/2 psig (3.5 kPa).
Orifice Sizes - Sea Level to High Altitude
(All Models)
These appliances are tested and approved for
installation at elevations of 0-4500 feet (0-1372
meters)abovesealevelusingthestandardburner
orifice sizes (marked with an "*" in Table 7). For
elevations above 4500 feet, contact your gas
supplier or qualified service technician . Install
the appliance according to the regulations of
the local authorities having jurisdiction and, in
the USA, the National Fuel Gas Code NFPA 54
/ ANSI Z223.1 - latest edition or, in Canada, the
CAN1-B149.1 and .2 codes - latest edition.
Input (BTU) Manually-Modulated Gas
Valves (millivolt models)
* PROPANE GAS
Models Input Rate (BTU / HR)
SDDV-35PM 27,000 high
20,700 low
SDDV-40PM 30,000 high
23,500 low
Table 2
Electronic Models
Electronic models have a fixed rate gas valve.
Input of electronic models is shown in Table
3.
Electronic Models with Fixed Rate Gas Valve
Natural and *Propane Gas
Model Series Input Rate (BTU / HR)
SDDV-35 27,000
SDDV-40 30,000
Table 3 * if field converted
Inlet Gas Supply Pressure
(all models)
Fuel # Minimum Maximum
Natural Gas 5.0" WC
(1.24 kPa)
10.5" WC
(2.61 kPa)
Propane 11.0" WC
(2.74 kPa)
13.0" WC
(3.23 kPa)
Table 4
Gas Pressure - All Models
Tables 4, 5 and 6 show the appliances' gas
pressure requirements:
Manifold Gas Supply Pressure
(millivolt models)
Fuel # Low High
Natural
Gas
(Lo) 2.2" WC
(.55 kPa)
(Hi) 3.5" WC
(.87 kPa)
Propane (Lo) 6.3" WC
(1.57 kPa)
(Hi) 10.0" WC
(2.49 kPa)
Table 5
Test gauge connections are provided on the
front of the millivolt gas control valve, identi-
fied IN for the inlet and OUT for the manifold
side. A 1/8" NPT Test gauge connection
is provided at the inlet and outlet side of
the electronic gas control valve.
Burner Orifice Sizes
Elevation 0-4500 feet ( 0-1372 meters)
Model
Series
Natural
Gas
drill size
(inches)
Propane
Gas
drill size (inches)
SDDV-35 #40 (.098") *
69L96 •
#53 (.0595") *
39L10 •
SDDV-40 #36 (.1065") *
18L40 •
#52 (.0635")*
LB-55874D •
* Standard size installed at factory
• Part /Cat. Number
Table 7
Manifold Gas Supply Pressure
(electronic models)
Fuel # Max. Manifold Pressure
Natural Gas (Hi) 3.5" WC (.87 kPa)
Propane (Hi) 10.0" WC (2.49 kPa)
Table 6
* If field converted - see Pages 34-36
Input (BTU) Manually-Modulated Gas
Valves (millivolt models)
NATURAL GAS
Models Input Rate (BTU / HR)
SDDV-35NM 27,000 high
21,000 low
SDDV-40NM 30,000 high
23,500 low
Table 1
Figure 2
Honeywell Electronic Gas Valve
FFO
NI
PSI
NO
L
O
R
T
N
O
C
G
INT
IER
Manifold Pressure
Port ON / OFF Switch
Inlet
Pressure
Port
Electronic Gas
Control Valve
Gas Valve Diagrams
See Figure 1 for Millivolt models and Figure 2
For Electronic Models.
H
I
LO
W
H
TPT
HT
P
T
P
I
L
O
T
P
I
L
O
T
O
N
it
O
F
F
IN OUT
Manifold Pressure Tap
Inlet Pressure Tap
SIT Millivolt Gas Valve
Pilot Adjustment
Screw
HI/LO Variable
Flame Height
Adjustment
Main Gas
Control Knob
OFF/PILOT/ON
Figure 1

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4
Note: The following requirements reference various Massachusetts
and national codes not contained in this document.
Requirements for the Commonwealth of Massachusetts
Forall sidewallhorizontally ventedgasfueledequipment installedinevery
dwelling, building or structure used in whole or in part for residential
purposes, including those owned or operated by the Commonwealth and
where the side wall exhaust vent termination is less than seven (7) feet
above finished grade in the area of the venting, including but not limited
to decks and porches, the following requirements shall be satisfied:
Installation Of Carbon Monoxide Detectors
At the time of installation of the side wall horizontal vented gas fueled
equipment, the installing plumber or gasfitter shall observe that a hard
wired carbon monoxide detector with an alarm and battery back-up is
installed on the floor level where the gas equipment is to be installed.
In addition, the installing plumber or gasfitter shall observe that a bat-
tery operated or hard wired carbon monoxide detector with an alarm is
installed on each additional level of the dwelling, building or structure
served by the side wall horizontal vented gas fueled equipment. It shall
be the responsibility of the property owner to secure the services of
qualified licensed professionals for the installation of hard wired carbon
monoxide detectors.
In the event that the side wall horizontally vented gas fueled equipment
is installed in a crawl space or an attic, the hard wired carbon monoxide
detector with alarm and battery back-up may be installed on the next
adjacent floor level.
In the event that the requirements of this subdivision can not be met at
the time of completion of installation, the owner shall have a period of
thirty (30) days to comply with the above requirements; provided, how-
ever, that during said thirty (30) day period, a battery operated carbon
monoxide detector with an alarm shall be installed.
Approved Carbon Monoxide Detectors
Each carbon monoxide detector as required in accordance with the
above provisions shall comply with NFPA 720 and be ANSI/UL 2034
listed and IAS certified.
Signage
A metal or plastic identification plate shall be permanently mounted to
the exterior of the building at a minimum height of eight (8) feet above
grade directly in line with the exhaust vent terminal for the horizontally
vented gas fueled heating appliance or equipment. The sign shall read, in
print size no less than one-half (1/2) inch in size, “GAS VENT DIRECTLY
BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS.”
Inspection
The state or local gas inspector of the side wall horizontally vented gas
fueledequipmentshallnotapprovetheinstallationunless,uponinspection,
the inspector observes carbon monoxide detectors and signage installed
in accordance with the provisions of 248 CMR 5.08(2)(a)1 through 4.
Exemptions
The following equipment is exempt from 248 CMR 5.08(2)(a)1 through 4:
• The equipment listed in Chapter 10 entitled “Equipment Not Required
To Be Vented” in the most current edition of NFPA 54 as adopted by
the Board; and
• Product Approved side wall horizontally vented gas fueled equipment
installed in a room or structure separate from the dwelling, building
or structure used in whole or in part for residential purposes.
MANUFACTURER REQUIREMENTS
Gas Equipment Venting System Provided
When the manufacturer of Product Approved side wall horizontally
vented gas equipment provides a venting system design or venting sys-
tem components with the equipment, the instructions provided by the
manufacturer for installation of the equipment and the venting system
shall include:
• Detailed instructions for the installation of the venting system design
or the venting system components; and
• A complete parts list for the venting system design or venting sys-
tem.
Gas Equipment Venting System NOT Provided
When the manufacturer of a Product Approved side wall horizontally
vented gas fueled equipment does not provide the parts for venting the
flue gases, but identifies “special venting systems”, the following require-
ments shall be satisfied by the manufacturer:
• Thereferenced “special ventingsystem” instructions shall be included
with the appliance or equipment installation instructions; and
• The “special venting systems” shall be Product Approved by the
Board, and the instructions for that system shall include a parts list
and detailed installation instructions.
A copy of all installation instructions for all Product Approved side wall
horizontally vented gas fueled equipment, all venting instructions, all
parts lists for venting instructions, and/or all venting design instructions
shall remain with the appliance or equipment at the completion of the
installation.
• Installation and repair must be done by a plumber or gas fitter licensed
in the Commonwealth of Massachusetts.
• The flexible gas line connector used shall not exceed 36 inches (92
centimeters) in length.
• The individual manual shut-off must be a T-handle type valve.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
5
WARNING
If the information in this
manual is not follwed
exactly, a fire or explosion
may result causing prop-
erty damage, personal
injury or loss of life.
SAFETY & WARNIING INFORMATION
WARNING
This appliance is only for use
with the type of gas indicated on
the rating plate. This appliance
is not convertible for use with
other gases, unless a certified
kit is used.
WARNING
These fireplaces are vented heat-
ers. Do not burn wood or other
material in these appliances.
WARNING
Children and adults should be
alerted to the hazards of high
surface temperatures. Use
caution around the appliance
to avoid burns or clothing igni-
tion. Young children should be
carefully supervised when they
are in the same room as the
appliance.
Note: An Optional Screen Door or
ScreenPanel fortheglassisavail-
able(seeHomeownersManualfor
ordering information).
WARNING
Do not place clothing or other
flammable materials on or near
this appliance.
WARNING
Do not use these appliances if
any part has been under water.
Immediately call a qualified,
professional service technician
to inspect the appliances and to
replace any parts of the control
system and any gas controls
which have been under water.
IMPORTANT
These appliances must not be
connected to a chimney or flue
serving a separate solid fuel
burning appliance.
IMPORTANT
It is imperative that the control
compartment, burners and
circulating air passage ways
of the appliance be kept clean.
SeeMaintenanceinstructionsin
Homeowner's Manual.
WARNING
Carbon monoxide poisoning:
early signs of carbon monoxide
poisoning are similar to the flu
withheadaches,dizzinessand/or
nausea. If you have these signs,
obtainfreshairimmediately.Turn
offthegassupplytotheappliance
and have it serviced by a quali-
fied professional, as it may not
be operating correctly.
AVERTISSEMENT
Ne pas se servir de cet appar-
eil s'il a été plongé dans l'eau,
complètement ou en partie.
Appeler un technicien qualifié
pour inspecter l'appareil et rem-
placer toute partie du système de
contrôle et toute commande qui
ont été plongés dans l'lau.
AVERTISSEMENT
Pour utilisation uniquement avec
les portes en verre certifiêes avec
l'appareil.
AVERTISSEMENT
Cet appareil doit être utilisé
uniquement avec les types de
gaz indiqués sur la plaque sig-
nalétique. Ne pas l'utiliser avec
d'autres gaz sauf si un kit de con-
version certifié est installé.
AVERTISSEMENT
Surveiller les enfants. Garder les
vêtements,les meubles, l'essence
ou autres liquides à vapeur inflam-
mables lin de l'appareil.
WARNING
This appliance may only be fitted
with doors certified for use with
the appliance.
WARNING
Failuretocomplywiththeinstal-
lationandoperatinginstructions
provided in this document will
result in an improperly installed
andoperatingappliance,voiding
its warranty. Any change to this
appliance and/or its operating
controlsisdangerous. Improper
installation or use of this appli-
ance can cause serious injury or
deathfromfire,burns,explosion
or carbon monoxide poisoning.
WARNING
Do not attempt to alter or modify
the construction of the appli-
ance or its components. Any
modification or alteration may
void the warranty, certification
and listings of this unit.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
6
COLD CLIMATE INSULATION
For cold climate installations, seal all cracks
around the appliance with noncombustible
material and wherever cold air could enter
the room. It is especially important to insulate
outside chase cavity between studs and under
floor on which the appliance rests, if floor is
above ground level. Gas line holes and other
openings should be caulked or stuffed with
unfaced fiberglass insulation. If the fireplace
is being installed on a cement slab, in cold
climates, a sheet of plywood or other raised
platform can be placed underneath to prevent
conductingcoldupintotheroom.Italsohelpsto
sheetrockinsidesurfacesandtapeformaximum
air tightness and caulk firestops.
LOCATION
Inselectingthelocation, theaestheticandfunc-
tionaluseoftheapplianceareprimaryconcerns.
However, vent system routing to the exterior
andaccesstothefuelsupplyarealsoimportant.
Consideration should be given to traffic ways,
furniture,draperies,etc.,duetoelevatedsurface
temperatures (Figure 3). The location should
also be free of electrical, plumbing or other
heating/air conditioning ducting.
These direct vent appliances are uniquely
suited for installations requiring a utility shelf
positioned directly above the fireplace. Utility
shelveslike these are commonlyusedforlocat-
ing television sets and decorative plants. Be
aware that this is a heat producing appliance.
Objects placed above the unit are exposed to
elevated temperatures.
To provide for the lowest possible shelf surface
use the alternate rear vent outlet with attached
ventingroutedinawaytominimizeobstructions
to the use of the space above the appliance. Do
not insulate the space between the appliance
and the area above it. See Figure 8.The mini-
mum height from the base of the appliance to
the underside of combustible materials used to
construct a utility shelf in this fashion is shown
in the Table in Figure 8.
The appliance should be mounted on a fully
supported base extending the full width and
depth of the unit. The appliance may be located
onornearconventional constructionmaterials.
However, if installed on combustible materials,
such as carpeting, vinyl tile, etc., a metal or
woodbarriercoveringtheentirebottomsurface
must be used.
NOI
TACI
LPPA
TNE
V
RAER
N
OITACILPPA T
N
E
V
P
OT
APPLICATION
TOP VENT
TNEVRAER NOITACILPPA
TNEVPOT NOITACILPPA
RECESSED
INSTALLATION
TOP VENT
APPLICATION
NOITACILPPA
TN
E
VPOT
NOITACILPPA
TNEVPOT
(Rear Vent
VERTICAL VENT
Application) (Rear Vent Application
HORIZONTAL VENT
without a chase)
HORIZONTAL VENT
(Rear Vent Application
With a chase)
HORIZONTAL VENT
(Top Vent
A
pp
lication
)
VERTICAL VENT
(Top Vent
A
pp
lication
)
Figure 3 - Typical Locations

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. 7
Termination Heights For Vents
Above Flat Or Sloped Roofs
Ref. NFPA 54 / ANSI Z223.1, 7.6
Roof Pitch * Feet *Meters
Flat to 6/12 1.0 0.3
6/12 to 7/12 1.25 0.38
7/12 to 8/12 1.5 0.46
8/12 to 9/12 2.0 0.61
9/12 to 10/12 2.5 0.76
10/12 to 11/12 3.25 0.99
11/12 to 12/12 4.0 1.22
12/12 to 14/12 5.0 1.52
14/12 to 16/12 6.0 1.83
16/12 to 18/12 7.0 2.13
18/12 to 20/12 7.5 2.29
20/12 to 21/12 8.0 2.44
The vent / air intake termination clearances
above the high side of an angled roof is as
shown in the following chart:
12
X
Roof Pitch is X/12
2 FT
MIN.
2 FT MIN.
Lowest
Discharge
Opening
H*
*H = MINIMUM HEIGHT FROM ROOF TO
LOWEST DISCHARGE OPENING OF VENT
TERMINATION HEIGHTS FOR VENTS ABOVE
FLAT OR SLOPED ROOFS
Horizontal Overhang
Vertical
Wall
Vent
Termination
Storm Collar
Concentric
Vent Pipe
Flashing
1 inch (25.4 mm) Minimum
Clearance to Combustibles
Figure 4
Vertical Vent Termination Clearances
(Gas Vent Rule)
VENT TERMINATION CLEARANCES
These instructions should be used as a guide-
line and do not supersede local codes in any
way. Install vent according to local codes,
these instructions, the current National Fuel
Gas Code (ANSI-Z223.1) in the USA or the
current standards of CAN/CGA-B149.1 and
-B149.2 in Canada.
Terminate multiple vent terminations according to
the installation codes listed above.
Terminate single vent caps relative to building
components according to Figure 4.
Horizontal Vent Termination Clearances
The horizontal vent termination must have
a minimum of 3" (76 mm) clearance to any
overhead combustible projection of 2-1/2" (64
mm) or less. See Figure 5. For projections
exceeding 2-1/2" (64 mm), see Figure 6. For
additional vent location restrictions refer to
Figure 6 on Page 8.
Figure 5
Side Elevation View
Note - See Figure 33 on
Page 20 for the exterior
wall recess allowances
of the square horizontal
termination.
3"
(76 mm)
12"
(305 mm)
Combustible Projection greater
Horizontal Vent Termination Clearances
Combustible Projection
2-1/2 inches or less in length
18"
(457 mm)
Ventilated
Soffit Unventilated
Soffit
than 2-1/2 inches in length
Termination Kit
MANUFACTURED HOME
REQUIREMENTS
This appliance may be installed in an after-
market permanently located, manufactured
home (USA only) or mobile home, where not
prohibited by local codes.
Cet appareil peut être installé dans un maison
préfabriquée (É.-U. seulement) ou mobile déjà
installée à demeure si les réglements locaux
le permettent.
Manufactured Home installations must be
installed in accordance with these instructions
and the following standards / codes:
• Manufactured Home Construction and
Safety Standard Title 24 CFR, Part 3280, or
the current Standard for Fire Safety Criteria
for Manufactured Home Installations, Sites
and Communities ANSI / NFPA 501A in the
USA, and CAN / CSA Z240 MH Mobile Home
Standard in Canada
• (when applicable) The American National
StandardforManufacturedHomes(NCSBCS
/ ANSI A225.1 - latest edition).
CAUTIONS
Ensure that the cross members
are not cut or weakened during
installation.Thestructuralinteg-
rity of the manufactured home
floor,wall,andceiling/roofmust
be maintained.
Thisappliancemustbegrounded
to the chassis of the manufac-
tured home in accordance with
local codes or in the absence of
local codes, with the National
Electrical Code ANSI / NFPA 70
- latest edition or the Canadian
ElectricalCodeCSAC22.1-latest
edition.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
8
V
VV
V
V
F
C
B
B
A
B
H
M
I
XV
D
V
AA
A
V
L
B
J
XE
V
A
G
*18”
18”
B
C
C
C
See Item D in the Text Below.
Center Line
of Termination
Exterior Wall
Horizontal
Termination
Ventilated Soffit
Inside Corner
DETAIL D
Minimum Clearances Canadian Installation * US Installation **
A = Clearance above grade, veranda, porch, deck
or balcony.
12 inches (30 cm) * 12 inches (30 cm) **
B = Clearance to window or door that may be
opened.
6 in. (15.2 cm) for appliances < 10,000 BTU/hr (3kW),
12 in. (30 cm) for appliances > 10,000 BTU/hr (3kW) and <
100,000 BTU/hr (30kW), 36 inches (91 cm) for appliances
> 100,000 BTU/hr (30kW)*
6 in. (15.2 cm) for appliances < 10,000 BTU/hr (3kW),
9 in. (23 cm) for appliances > 10,000 BTU/hr (3kW) and <
50,000 BTU/hr (15kW), 12 inches (30 cm) for appliances
> 50,000 BTU/hr (15kW)*
C = Clearance to permanently closed window 12 inches (305 mm) recommended to prevent window
condensation
9 inches (229 mm) recommended to prevent window
condensation
D = Vertical clearance to ventilated soffit located
abovethe terminal withina horizontaldistance of18
in. (458 mm) from the center line of the terminal
18 inches (458 mm) 18 inches (458 mm)
E = Clearance to unventilated soffit 12 inches (30 cm) 12 inches (30 cm)
F = Clearance to outside corner 5 inches (12.7 cm) 5 inches (12.7 cm)
G = Clearance to inside corner 6 in. (15 cm) 6 in. (15 cm)
H = Clearance to each inside of center line extended
above meter / regulator assembly
3 feet (91 cm) within a height of 15 feet above the meter /
regulator assembly *
3 feet (91 cm) within a height of 15 feet above the meter
/ regulator assembly **
I = Clearance to service regulator vent outlet 3 feet (91 cm) * 3 feet (91 cm) **
J = Clearance to non-mechanical air supply inlet
to building or the combustion air inlet to any other
appliance
6 in. (15.2 cm) for appliances < 10,000 BTU/hr (3kW), 12
in. (30 cm) for appliances > 10,000 BTU/hr (3kW) and <
100,000 BTU/hr (30kW), 36 inches (91 cm) for appliances
> 100,000 BTU/hr (30kW)*
6 in. (15.2 cm) for appliances < 10,000 BTU/hr (3kW), 9
in. (23 cm) for appliances > 10,000 BTU/hr (3kW) and <
50,000 BTU/hr (15kW), 12 inches (30 cm) for appliances
> 50,000 BTU/hr (15kW)*
K = Clearance to mechanical air supply inlet 6 feet (1.8 meters) * 3 feet (91 cm) above, if within 10 feet (3 m) horizon-
tally**
L = Clearance above paved sidewalk or paved
driveway located on public property
7 feet (2.13 m) ‡ 7 feet (2.13 m) ‡
M = Clearance under veranda, porch, deck or
balcony
12 in. (30 cm) * ‡ 12 in. (30 cm) ** ‡
* In accordance with the current CSA-B149.1 National Gas and B149.2 Propane Installation Code - Latest Editions.
** In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Codes - Latest Edition.
‡ A vent shall not terminate directly above a sidewalk or paved driveway which is located between two single family dwellings and serves both dwellings.
*‡ Only permitted if veranda, porch, deck or balcony is fully open on a minimum 2 sides beneath the floor.
Inside
Corner Detail
Operable
Window
Fixed
Closed
Window
= 9" in U.S.
= 12" in Canada
3 ft.
3 ft.
= Air Supply Inlet = Vent Terminal = Area where Terminal is NOT permitted
Figure 6
EXTERIOR HORIZONTAL VENT TERMINATION CLEARANCE REQUIREMENTS

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. 9
Combustible materials may project beyond the sides of the fire-
place opening as long as they are kept within the shaded areas
illustrated here.
Hearth Extension - A hearth extension is not required with this appliance. If a hearth extension is
used,do notblockthe lower controlcompartmentdoor. Anyhearthextensionused isforappearance
only and does not have to conform to standard hearth extension installation requirements.
Wall Finishes / Surrounds / Mantels
Note: Combustible wall finish materials and/or surround materials must not be allowed to encroach
the area defined by the appliance front face (black sheet metal). Never allow combustible materials
to be positioned in front of or overlapping the appliance front face. See Figure 56 on Page 31.
Non-combustible materials, such as surrounds and other appliance trim, may be installed on the
appliance front face with these exceptions: they must not cover any portion of the removable glass
panel or louvers.
Vertical installation clearances to combustible mantels vary according to the depth of the mantel.
See Figure 7. Mantels constructed of non-combustible materials may be installed at any height
above the appliance opening; however, do not allow anything to hang below the hood.
MINIMUM CLEARANCES TO COMBUSTIBLES
4 (102)
2
(51)
4
(102)
6
(152)
8
(203)
10
(254)
12
(305)
6 (152)
10 (254)
14 (356)
12 (305)
8 (203)
Top of
Appliance
inches (millimeters)
Mantel Depth
Figure 7 - Minimum Mantel Clearances
5 (127)
8-1/4
(209)
14
(356)
12 (305)
17 (432)
Combustible Materials
Allowed In Shaded
Area “Safe Zone”
Combustible Walls
shown in dark gray
Minimum Distance to Unprotected Side Wall
Top View of
Fireplace
45o
At 14" minimum
side wall clearance,
a combustible wall
can project to any
length.
Protected wall shown in white
Inches (millimeters)
Figure 9
At 8-1/4" side
wall clearance, a
combustible wall
can project 12"
Hood
Shelf Above Fireplace With Rear Venting
Do not insulate the
space between the
appliance and the
area above it.
Shelf Height
(
see table)
*Shelf Height
(
see table)
Do not insulate the
space between the
appliance and the
area above it.
Shelf Above Fireplace With Top Venting
MINIMUM CLEARANCES Inches (millimeters)
Back 1/2 (13)
0 (0) Spacers
Sides 1/2 (13)
0 (0) Spacers
Top Spacers 0 (0)
Floor 0 (0)
Bottom of Appliance
To Ceiling 64 (1626)
Vent 3 (76) Top *
1 (25.4) Sides & Bottom
SERVICE CLEARANCES Feet (meters)
Front 3 ft. (0.9 m)
Table 8
Figure 8 - Shelf Height Minimum Clearances
Model No.
Combustible Shelf Height - Inches (millimeters)
Top Vent - with One 90 Degree Elbow Rear Vent - Straight Out the Back
Secure Vent Secure Flex
(flex elbow)
Secure Vent Secure Flex
SDDV-35
SDDV-40
*53-1/2 (1359) *55-1/4 (1403)
40-1/4 (1022) 40-1/4 (1022)
* Includes 3” clearance to combustibles (required above vent components)
*Note: 3 in. (75 mm) above any horizontal/in-
clined vent component.
**Note: See Page 10, Step 1 for clearance
requirements to the nailing flange located
at each side of the unit and any screw heads
adjacent to it.
Appliance and Vent Clearances
Theapplianceisapprovedwith zeroclearanceto
combustible materials on all sides (as detailed
in Table 8), with the following exception: When
the unit is installed with one side flush with a
wall, the wall on the other side of the unit must
not extend beyond the front edge of the unit.
In addition, when the unit is recessed, the side
walls surrounding the unit must not extend
beyond the front edge of the unit. See Figure
3 on Page 6.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
10
Also see Figure 13.
6-1/2"
(152 mm)
3"
(76 mm)
Figure 12 - ROUTE GAS LINE
Right Side Front
Corner of Fire-
place Framing
Continued on Page 12.
TYPICAL INSTALLATION SEQUENCE
The typical sequence of installation follows,
however, each installation is unique resulting
in variations to those described.
See the Page numbers references in the follow-
ing steps for detailed procedures.
Step 1. (Page 10) Construct the appliance
framing. Position the appliance within the
framing and secure with nailing brackets.
Step 2. (Page 10) Route gas supply line to
appliance location.
Step 3. (Page 13) Install the vent system and
exterior termination.
Figure 10
REMOVE
CARDBOARD
BEFORE USING
REMOVE
CARDBOARD
BEFORE USING
Pressure Relief Plates
Remove Cardboard Before
Using Appliance
See-Through Model Shown
Left side installation is optional (see Figure 13)
STEP 2. ROUTING GAS LINE
Route a 1/2" (13 mm) gas line along the inside
of the right side framing as shown in Figure
12.Gas lines must be routed, constructed and
made of materials that are in strict accordance
withlocal codesandregulations. All appliances
are factory-equipped with a flexible gas line
connector and 1/2 inch shutoff valve. (See
Step 6 on Page 26).
DETAILED INSTALLATION STEPS
The appliance is shipped with all gas controls
and components installed and pre-wired. Re-
move the shipping carton, exposing the front
glassdoor. Removethetopandbottomlouvered
control panel per instructions on Page 27 (see
Control Compartment Access / Louver Panel
Instructions). Remove the cardboard from
underneaththe pressure relief plates, inarea
behindtoplouverpanel(see Figure 10). Open
thetwolatches (located under the firebox floor)
securing the glass door. Remove the door by
tilting it outward at the bottom and lifting it up.
Setthedooraside protectingitfrominadvertent
damage. See Figure 53 on Page 30.
Step 4. (Page 25) Field Wiring
a. MillivoltAppliances–Theoperatingcontrol
switch is factory installed.
b. Electronic Appliances – Connect 120 VAC
electrical power to the appliance recep-
tacle.
Step 5. (Page 25) Install blower kit (optional
equipment).
Step 6. (Page 26) Make connection to gas sup-
ply.
Step 7. (Page 27) Checkout appliance operation.
Step 8. (Page 28) Install the logs, volcanic stone
and glowing embers.
Step 9. (Page 30) Install glass door frame as-
sembly.
Step10.(Page 30) Adjustburnertoensureproper
flame appearance.
Step 11. (Page 31) Install the hood.
Step 1. FRAMING
Frame these appliances as illustrated in Figure
13 on Page 11, unless the appliance is to be
installed in a corner. See Figure 14 on Page
12 for corner framing installations. All framing
details must allow for a minimum clearance to
combustible framing members as shown in
Table 8 on Page 9.
If the appliance is to be elevated above floor
level, a solid continuous platform must be
constructed.
Headers may be in direct contact with the
appliance top spacers but must not be sup-
ported by them or notched to fit around them.
All construction above the appliance must be
self supporting. DO NOT use the appliance for
structural support.
Thefireplaceshouldbesecuredtothesideframing
membersusingtheunit'snailingflanges-onetop
andbottomoneachside ofthefireplace front.See
Figure 11. Use 8d nails or their equivalent.
Figure 11
Note: The nailing flanges, combustible members
and screw heads located in areas directly adjacent
to the nailing flanges, are EXEMPT from the 1/2”
clearance to combustible requirements for the
firebox outer wrapper. Combustible framing may be
in direct contact with the nailing flanges and may
be located closer than 1/2” from screw heads and
the firebox wrapper in areas adjacent to the nailing
flanges. Frame the opening to the exact dimensions
specified in the framing details of this manual.
Side
Framing
Unit Nailing Flange
(No clearance to
combustible
framing is required)
Left Side Front Corner of Fireplace Shown
(Right Side Requirements the Same)
Unit Being Secured By Its Nailing Flanges
To The Framing

11
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
FIREPLACE SPECIFICATIONS
Vent Size
Co-axial DV Vent Size 4-1/2" Inner
7-1/2" Outer
Notes
* The Steady State Efficiency numbers based on
maximum vent configuration.
Due to Lennox' ongoing commitment to quality,
all specifications, ratings and dimensions are
subject to change without notice.
Unit is shipped with vent seal cap and flue cover
plate installed on both flue outlets.
Input (BTU) - MV & Electronic
Natural (NG) & Propane (LP) Gas
Models Fuel Input Rate (BTU / HR)
SDDV-35
NG High 27,000
Low 21,000
LP High 27,000
Low 20,700
SDDV-40
NG High 30,000
Low 23,500
LP High 30,000
Low 23,500
Framing Dimensions - Inches (millimeters)
Models A B C
(rear vent)
C
(top vent)
DE
SDDV-35 35-1/4 (895) 40-1/4 (1022) 20-7/8 (530) 23-5/8 (600) 27-1/2 (699) 46-3/4 (1188)
SDDV-40 40-1/4 (1022) 40-1/4 (1022) 20-7/8 (530) 23-5/8 (600) 27-1/2 (699) 46-3/4 (1188)
Fireplace Dimensions - Inches (millimeters)
Model A B C D E F GH
SDDV-35 40-1/8 (1019) 37-1/8 (943) 24 (610) 29-1/2 (749) 35-1/8 (892) 27-1/2 (698) 21-1/2 (546) 10-3/4 (273)
SDDV-40 40-1/8 (1019) 37-1/8 (943) 24 (610) 34-1/2 (876) 40-1/8 (1019) 27-1/2 (698) 26-1/2 (675) 13-3/4 (337)
G
H
Top View
Co-Axial Direct Vent Pipe
Collars (Top & Rear Vent)
Flue Outlet - 4-1/2 (114),
Combustion Air - 7-1/2 (190)
(275)
FRAMING
SPACERS
(Top and Sides
and Rear)
10-7/8
F
(13)
ELECTRICAL
INLET
3 (76)
Right Side View
GAS INLET
(Either Side
and bottom)
7
179)
(531)
Hood
(257)
10-1/8
(57)
2-1/4
1/2
20-7/8
D
C
Front View
B
3 (76)
A
E
2 (51)
Figure 13
A
BE
7
(178)
12-1/8
(308)
12-1/8
(308)
( 267 )
D
VENT FRAMING -
TOP VENT WITH ONE
90°ELBOW
VENT FRAMING -
REAR VENT WITH
NO ELBOWS
Inches (mm)
(130)
(130)
7
(178)
C is the required framing depth
dimension when the finish material
(
dr
y
wall
)
thickness is 1/2 in.
(
13mm
)
.
A
C
1/2
10-1/2
5-1/8
5-1/8
**Framing should be constructed
of 2 x 4 or larger lumber.
**Framing With Square Horizontal Termination SV4.5HT-2
Product Reference Information
Cat.
No.
Model Ship.
Wt.(lbs)
Ship.Vol. (Cubic feet)
H4835 SDDV-35NM 128 Lb's 18.3 cu. ft. - 40-1/4 x 36-7/8 x 21-7/8"
H4836 SDDV-35PM 128 Lb's 18.3 cu. ft. - 40-1/4 x 36-7/8 x 21-7/8"
H4837 SDDV-35NE 128 Lb's 18.3 cu. ft. - 40-1/4 x 36-7/8 x 21-7/8"
H4838 SDDV-40NM 142 Lb's 20.9 cu. ft. - 40-1/4 x 41-5/8 x 21-7/8"
H4839 SDDV-40PM 142 Lb's 20.9 cu. ft. - 40-1/4 x 41-5/8 x 21-7/8"
H4840 SDDV-40NE 142 Lb's 20.9 cu. ft. - 40-1/4 x 41-5/8 x 21-7/8"

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
12
Corner Framing With SV4.5HT-2 Termination - Inches (millimeters)
Model A B C D E F
SDDV-35 35-1/8
(892)
65-1/2
(1664)
46-5/16
(1176)
25-11/16
(652)
32-3/4
(832)
5
(127)
SDDV-40 40-1/8
(1019)
67-3/4
(1721)
47-7/8
(1216)
25-11/16
(652)
33-7/8
(860)
5-3/4
(146)
Notes:
• Venting requirements for rear vent applications in corner installations, the horizontal vent
length “a” to “b,” must not exceed 28 inches (711).
*These dimensions occur when one 45 degree elbow is connected directly to the appliance collar.
*In SDDV-35 corner installations, the unit has been moved 1-3/8 in. (35 mm) into the room in
order to achieve a minimum of 5 in. (127 mm) in the F dimension.
Figure 14 Corner Framing with Square Termination (SV4.5HT-2)
Schedule 40 / Black Iron Pipe
Inside Diameter (Inches)
Schedule 40 Pipe
Length (feet)
Natural
Gas
Propane
Gas
0-10 1/2 3/8
10-40 1/2 1/2
40-100 1/2 1/2
100-150 3/4 1/2
150-200 3/4 1/2
Table 9
• A pipe joint compound rated for gas should be
used on the threaded joints. Ensure propane
resistant compounds are used in propane
applications. Be very careful that the pipe
compound does not get inside the pipe.
• It is recommended to install a sediment trap
in the supply line as close as possible to the
appliance (see Figure 46). Appliances using
Propane should have a sediment trap at the
base of the tank.
• Check with local building official for local code
requirements(i.e.arebelowgradepenetrations
of the gas line allowed?, etc).
IMPORTANT: If propane is used, be aware that
if tank size is too small (i.e. under 100-lbs, if
this is the only gas appliance in the dwelling.
Ref. NPFA 58), there may be loss of pressure,
resulting in insufficient fuel delivery (which
can result in sooting, severe delayed ignition
or other malfunctions). Any damage resulting
from an improper installation, such as this, is
not covered under the limited warranty.
Proper Sizing of Gas Line
Properly size and route the gas supply line
from the supply regulator to the area where
the appliance is to be installed per require-
ments outlined in the National Fuel Gas Code,
NFPA 54 - latest edition (USA) or B149 - latest
edition (Canada).
Never use galvanized or plastic pipe. Refer to
Table 9 for proper sizing of the gas supply line,
if black iron pipe is being used. Gas lines must
be routed, constructed and made of materials
that are in strict accordance with local codes
and regulations. We recommend that a quali-
fied individual such as a plumber or gas fitter
be hired to correctly size and route the gas
supply line to the appliance. Installing a gas
supply line from the fuel supply to the appliance
involvesnumerousconsiderationsof materials,
protection,sizing,locations,controls,pressure,
sediment,andmore.Certainlynooneunfamiliar
andunqualified should attempt sizing orinstall-
ing gas piping.
Notes:
• All appliances are factory-equipped with a
flexiblegasline connectorand1/2inch shutoff
valve (see Figures 46 & 48).
• SeeMassachusetts Requirements onPage 4
for additional requirements for installations in
the state of Massachusetts in the USA.
• The gas supply line should Not be connected
to the appliance until Step 6 (Page 26).
Inches
(millimeters)
*C
Back wall of chase/enclosure
(including any finishing materials)
a
7 (178)
b
*D
*E
*F
A
*B
FIREPLACE FRAMING SPECIFICATIONS

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. 13
Figure 17a
Figure 16
Select Venting System -
Horizontal or Vertical
With the appliance secured in framing, de-
termine vent routing and identify the exterior
termination location. The following sections
describe vertical (roof) and horizontal (exterior
wall) vent applications. Refer to the section
relating to your installation. A list of approved
venting components is shown on Pages 32
to 34.
Figure 15
Step 3. INSTALL THE VENT SYSTEM
General Information
These instructions should be used as a guide-
line and do not supersede local codes in any
way. Install vent according to local codes,
these instructions, the current National Fuel
Gas Code (ANSI-Z223.1) in the USA or the
current standards of CAN/CGA-B149.1 and
-B149.2 in Canada.
Useonlyapprovedventingcomponents. See
Approved Vent Components on Page 2.
These fireplaces must be vented directly
to the outside.
The vent system may not service multiple
appliances, and must never be connected to a
flue serving a solid fuel burning appliance. The
vent pipe is tested to be run inside an enclosing
wall (such as a chase). There is no requirement
for inspection openings in the enclosing wall at
any of the joints in the vent pipe.
Preparing the Appliance Vent Collar
Each of the unit's two vent collars are sealed
with a cover plate and a seal cap. The cover
plate and seal cap must be removed from the
cent collar being used. Refer to Figure 15 for
top vent usage and Figure 16 for rear, and
the following steps to prepare the appropriate
collar for use.
From the vent collar being used, remove the
screw securing the vent seal cap. Twist the cap
counterclockwise to disengage it from the vent
collar. Remove and discard the seal cap.
When the top vent is being used, remove the
lintel cover plate by pushing it back towards
the rear of the fireplace by its front flange. It
can then be removed by pulling it forward.
Loosen the two screws in the keyhole slots of
the vent cover plate and remove the remaining
two vent cover plate securing screws. Remove
and discard the vent cover plate. Reinstall and
securely tighten all four cover plate screws.
Reinstall the lintel cover plate.
When the rear vent is being used, from inside
thefirebox,removethetwoscrews securingthe
baffletotherear wallofthefirebox,then remove
thebaffle. Loosenthetwo screwsinthekeyhole
slotsofthecoverplateandremovetheremaining
two cover plate securing screws. Remove and
discard the cover plate. Reinstall and securely
tighten all four cover plate screws. Re-secure
the baffle to the rear wall of the firebox.
Preparing The Appliance Top Or Rear Vent
Outlet
When There Is 3 Feet Or More Of Vertical
Venting, install a vent restrictor (provided) in
the appliance top or rear flue outlet as shown
in Figures 17a & 17b. It is held in place by
friction, only.
VENT SEAL CAP
FIREBOX TOP
CABINET TOP
SECURING SCREWS
VENT
COVER PLATE
TOP VENT
TOP VENT SEAL CAP & COVER PLATE
REMOVAL WHEN USING THE TOP VENT
VENT COVER PLATE
SECURING SCREW
CROSS SECTION
(INSIDE UNIT)
(OUTSIDE UNIT)
LINTEL
LINTEL
COVER PLATE
PUSH TO BEGIN REMOVAL
PROCESS OF LINTEL COVER PLATE
VENT SEAL CAP
SECURING SCREWS
CROSS SECTION
BAFFLE
SECURING
SCREWS
BAFFLE
REAR VENT
COVER PLATE
SECURING SCREWS
REAR VENT SEAL CAP & COVER PLATE REMOVAL
WHEN USING THE REAR VENT
CABINET BACK
(INSIDE UNIT)
(OUTSIDE UNIT)
TOP VENT
Restrictor Installation
If3ft.ormoreofverticalventingis used, install
a vent restrictor in the top vent of the fireplace
outlet. It can be installed from the inside or
outsideof the unit, in the inner fireplace collar.
It is held in place by friction only.
Appliance Top
Vent Outlet
Restrictor
Inner
Fireplace
Collar
Inner Fireplace
Collar Appliance Rear
Vent Outlet
Restrictor
REAR VENT
Restrictor Installation
If 3 ft. or more of vertical venting is used, install
a vent restrictor in the rear vent of the fireplace
outlet. It can be installed from the inside or
outside of the unit, in the inner fireplace collar.
It is held in place by friction only.
Figure 17b
WARNING
Failure to reinstall and securely
tighten cover plate screws could
result in leakage of flue products
into the living space. Vent cover
plate and vent seal plate must
remain securely installed on
unused vent collar. Failure to do
so could result in leakage of flue
products into living space.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
14
SV4.5CGV-1
Termination SV4.5FA OR
SV4.5FB Flashing
AND SV4.5SC
STORM COLLAR

SV4.5VF
Firestop/Spacer
SV4.5L6/12/24/36/48
Vent Sections
40' Max
(12.2 M)
1" (25.4 mm)
Minimum
Clearance to
Combustibles

When using Secure Flex
use Firestop/Spacer
SF4.5VF
44121100034
0515.21010034
5.451578.21110035
5.061573.31020035
5.271573.41000505
77157.41100506
38152.51010506
6815.51000044
5.091578.51100045
5.691573.61010045
5.502521.71011507
70252.71000606
5.112526.71100607
5.712521.81010607
5.922521.91001607
5.232573.91000055
73257.91100056
5.142521.02000707
6425.02100708
25212010708
46222001708
67232000808
97252.32000066
5.082573.32100809
5.382526.32100067
5.982521.42010067
5.103521.52001067
5.013578.52000909
5135.621009001
5.523521.72000077
0335.72100078
63382010078
54357.8200001001
5.943521.9210001011
27313000088
5.673573.13100089
5.973526.1300011011
5.814578.43000099
32452.531000901
56457.8300000101
Vent Section Length Chart
Nominal Section
Length (inches) 612243648
Net Section
Length (inches) 4 ½ 10 ½ 22 ½ 34 ½ 46 ½
Height of Vent Number of Vent Sections
*inches feet
T
O
T
A
L
Q
T
Y
5.4573.0100001
957.0200002
5.01578.0010001
5152.1110002
5.91526.12100
03
1257.1020002
5.22578.1001001
5.52521.2120003
5.13526.2030003
5.43578.2000101
5.73521.3111003
5.34526.3021003
5457.3002002
5.64578.3000011
5.94521.4102003
1552.4100012
5.55526.4012003
7557.4001102
6652.5022004
5.76526.5003003
9657.5000202
27 6103004
5.37521.6100203
5.97526.6010203
1857.6000112
095.7021014
5.19526.7002013
3957.7000022
69 8101204
5.79521.8100023
2015.8200024
5.301526.8000303
801 9100304
4115.9020024
71157.9105006
5.811578.9110305
6215.01001304
5.031578.01101305
53152.11006006
8315.11000404
5.931526.11000033
5.241578.11100405
Vent Section Length Chart
Nominal
Section Length
(inches)
612243648
Net Section
Length (inches) 4 ½ 10 ½ 22 ½ 34 ½ 46 ½
Height of Vent Number of Vent Sections
*inches feet
T
O
T
A
L
Q
T
Y
Table 10a
Table 10b
* Convert inches into metric equiva-
lent measure, as follows:
Millimeters (mm) = Inches x 25.4
Centimeters (cm) = Inches x 2.54
Meters (M) = Inches x .0254
Effective Vent Length
Model Effective Length
SV4.5L6 4-1/2"
SV4.5L12 10-1/2"
SV4.5L24 22-1/2"
SV4.5L36 34-1/2"
SV4.5L48 46-1/2"
Table 11
Figure 18
VERTICAL TERMINATION SYSTEMS (ROOF)
Figure 21 (Page 15), and Figures 26 to
30 (Pages 17 and 18) and their associated
Vertical Vent Tables illustrate the various verti-
cal venting configurations that are possible for
use with these appliances. Secure Vent pipe
applicationsareshownintheseFigures;Secure
Flex pipe may also be used. A Vertical Vent
Tablesummarizes each system’s minimum and
maximum vertical and horizontal length values
that can be used to design and install the vent
components in a variety of applications.
Both these vertical vent systems terminate
through the roof. The minimum vent height
above the roof and/or adjacent walls is speci-
fied in ANSI Z223.1-(latest edition) (In Canada,
the current CAN-1 B149 installation code) by
major building codes. Always consult your lo-
cal codes for specific requirements. A general
guide to follow is the Gas Vent Rule (refer to
Figure 4 on Page 7).
Vertical (Straight) Installation
Determine the number of straight vent sections
required. 4-1/2" (114 mm), 10-1/2" (267 mm),
22-1/2" (572 mm), 34-1/2" (876 mm) and 46-
1/2"(1181mm)netsectionlengthsareavailable
(see Table 11 and Page 32 - Item 3). Plan the
vent lengths so that a joint does not occur at
the intersection of ceiling or roof joists. Refer
to the Vent Section Length Chart.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. 15
To add another vent component to a length of
vent run, align the dimpled end over the inclined
channel end of the previously installed section,
adjustingthe radial alignmentuntil the fourlock-
ing dimples are aligned with the inlets of the four
incline channels of the previous section.
Push the vent component against the previous
section until it fully engages, then twist the
componentclockwiserunningthedimplesdown
and along the incline channels until they seat at
the end of the channels. This seating position
is indicated by the alignment of the arrow and
dimple as shown in Figure 20.
D. Install firestop/spacer at ceiling - When
usingSecureVent,useSV4.5VFfirestop/spacer
at ceiling joists; when using Secure Flex, use
SF4.5VF firestop/spacer. If there is living space
above the ceiling level, the firestop/spacer
must be installed on the bottom side of the
ceiling. If attic space is above the ceiling, the
firestop/spacermustbeinstalledonthetopside
of the joist. Route the vent sections through the
framed opening and secure the firestop/spacer
with 8d nails or other appropriate fasteners at
each corner. Remember to maintain 1" (25
mm) clearance to combustibles, framing
members, and attic or ceiling insulation
when running vertical chimney sections.
Attic insulation shield (96K94) may be used
to obtain the required clearances indicated
here. See installation accessories, Pages
32 through 34.
E. Support the vertical vent run sections -
Note - Properventing support is very important.
The weight of the vent must not be supported
by the firplace in any degree.
Support the vertical portion of the venting
system every 8 feet (2.4m) above the fireplace
vent outlet.
Figure 20
Align the dimple (four places) of the
upper vent section with the opening
of the locking incline channel on the
lower vent section or appliance col-
lar. Twist vent component clockwise
to engage and seal until arrow and
dimple align.
Dimple
Locking Incline
Channel
Connected Vent
Sections Arrow
Arrow
Appliance Collar or
Vent Section
Figure 19
10-1/2" Min.
(267 mm)
10-1/2" Min.
(267 mm)
Vertical (Offset) Installation
Analyze the vent routing and determine the
quantitiesofventsectionsandnumberofelbows
required. Refer to Vertical Vent Figures and
Tables on Pages 17 & 18 to select the type of
vertical installation desired. Vent sections are
available in net lengths of 4-1/2" (114 mm),
10-1/2" (267 mm), 22-1/2" (572 mm), 34-1/2
" (876 mm) and 46-1/2" (1181 mm). Refer to
the Vent Section Length Chart on Page 14 for
anaid in selectinglengthcombinations.Elbows
areavailablein90°and45°configurations.Refer
to Figure 22 on Page 16 for the SV4.5E45 and
SV4.5E90 elbow dimensional specifications.
Where required, a telescopic vent section
(SV4.5LA) may be used to provide the installer
withanoptionin installing in tight and confined
spaces or where the vent run made up of fixed
length pieces develops a joint in a undesirable
location, or will not build up to the required
length. The SV4.5LA Telescopic Vent Section
has an effective length of from 1-1/2" (38 mm)
to 7-1/2 " (191 mm). The SV4.5LA is fitted with
a locking inclined channel end (identical to a
normalventsectioncomponent)andaplainend
with 3 pilot holes. Slip the plain end over the
locking channel end of a standard SV4.5 vent
component the required distance and secure
with three screws.
Maintain a minimum 1" (25 mm) clearance to
combustiblematerialsforallverticalelements.
Clearances for all horizontal elements are 3"
(76 mm) on top, 1" (25 mm) on sides and 1"
(25 mm) on the bottom.
A. Frame ceiling opening - Use a plumb line
from the ceiling above the appliance to locate
center of the vertical run. Cut and/or frame an
opening, 10-1/2" x 10-1/2" (267mm x 267mm)
inside dimensions, about this center mark
(Figure 19).
Toattachaventcomponenttotheappliancecollar,
alignthedimpledendoverthecollar,adjustingthe
radial alignment until the four locking dimples are
aligned with the inlet of the four inclined channels
on the collar (refer to Figure 20). Push the
vent component against the collar until it fully
engages, then twist the component clockwise,
runningthe dimples down and along the incline
channels until they seat at the end of the chan-
nels. The unitized design of the Secure Vent
componentswill engage and sealboththeinner
and outer pipe without the need for sealant or
screws. If desired, a #6 x 1/2" screw may be
used at the joint, but is not required as the pipe
will securely lock when twisted.
Note: An elbow may also be attached to the
appliance collar. Attach in the same manner
as you would a vent section.
C. Attach vent components to each other
-Other vent sections may be added to the
previously installed section in accordance with
the requirements of the vertical vent Figures
and Tables.
B. Attach vent components to appliance
-SecureVentSV4.5directvent systemcompo-
nents are unitized concentric pipe components
featuring positive twist lock connections (see
Figure 20).
All of the appliances covered in this document
are fitted with collars having locking inclined
channels. The dimpled end of the vent com-
ponents fit over the appliance collar to create
the positive twist lock connection.
Blocking
Support Straps
(Plumber's tape)
8 feet (2.4 m)
Maximum
1 inch (25.4
mm) minimum
clearance to
combustibles
Figure 21

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
16
Ifthevent system extends more than 5 feet(1.5
m) above the roof flashing, stabilizers may be
necessary. Additional screws may be used at
section joints for added stability. Guide wires
may be attached to the joint for additional sup-
port on multiple joint configurations.
G.Continueinstallationofhorizontal/inclined
sections - Continue with the installation of the
straight vent sections in horizontal/inclined run
as described in Step C. Install support straps
every 5 ft. (1.52 m) along horizontal/inclined
vent runs using conventional plumber’s tape.
See Page 19, Figure 31. It is very important
that the horizontal/inclined run be maintained
in a straight (no dips) and recommended to be
in a slightly elevatedplane, in a direction away
from the fireplace of 1/4 " rise per foot (20 mm
per meter) which is ideal, though rise per foot
run ratios that are smaller are acceptable all the
way down to at or near level.Use a carpenter’s
level to measure from a constant surface and
adjust the support straps as necessary.
It is important to maintain the required clear-
ances to combustibles: 1" (25 mm) at all sides
for all vertical runs; and 3" (76 mm) at the top,
1" (25 mm) at sides, and 1" (25 mm) at the
bottom for all horizontal/inclined runs.
H. Frame roof opening - Identify location for
vent at the roof. Cut and/or frame opening per
Roof Framing Chart and Figure 23.
One method of support is by utilizing field pro-
vided support straps (conventional plumber's
tape). Securetheplumber'stapetotheframing
members with nails or screws. Loop the tape
around the vent, securing the ends of the tape
totheframing.If desired,sheetmetalscrews#6
x 1/2" length may be used to secure the support
straps to the vent pipe. Refer to Figure 21.
F. Changeventdirectiontohorizontal/inclined
run - At transition from or to a horizontal/in-
clined run, install the SV4.5E45 and SV4.5E90
elbows in the same manner as the straight vent
sections. The elbows feature a twist section to
allow them to be routed about the center axis
of their initial collar section to align with the
required direction of the next vent run element.
Twist elbow sections in a clockwise direction
only so as to avoid the possiblity of unlocking
anyofthepreviouslyconnectedvent sections.
See Figure 22.
K. Install the vertical termination - The final
step involves installation of the SV4.5CGV-1
Vertical Termination. Extend the vent sections
to the height as shown in the "Vertical vent ter-
mination section" on Page 7. The SV4.5CGV-1
VerticalTermination(Figure 25) canbeinstalled
in the exact same fashion as any other Secure
Vent section. Align the termination over the
end of the previously installed section, adjust-
ing the radial alignment until the four locking
dimples of the termination are aligned with
the inlets of the four incline channels of the
last vent section. Push the termination down
until it fully engages, then twist the termination
clockwise running the dimples down and along
the incline channels until they are seated at the
end of the channels.
I. Install the roof flashing - Extend the vent
sections through the roof structure. Install the
roof flashing over the vent section and posi-
tion such that the vent column rises vertically
(use carpenters level) (Figure 24 ). Nail along
perimeter to secure flashing or adjust roofing
to overlap the flashing edges at top and sides
only and trim where necessary. Seal the top
and both sides of the flashing with waterproof
caulking.
J. Install the storm collar - Install the storm
collar, supplied with the flashing, over the
vent/flashing joint. See Figure 24. Loosen the
storm collar screw. Slide collar down until it
meets the top of the flashing. Tighten the ad-
justing screw. Apply non-combustible caulking
or mastic around the circumference of the joint
to provide a water tight seal.
Figure 22
7-5/8”
(194 mm)
4-13/16
(122 mm)
Swivel Joint
(360° swivel)
SV4.5E45
45° Elbow)
Swivel Joint
(360° swivel)
SV4.5E90
90° Elbow)
(206 mm)
8-1/8"
Figure 24
Storm
Collar
Figure 25
Framing Dimensions for Roof
Inches (millimeters)
Pitch C D
0/12 10-1/2 in.
(267 mm)
10-1/2 in.
(267 mm)
6/12 10-1/2 in.
(267 mm)
12 in.
(305 mm)
12/12 10-1/2 in.
(267 mm)
17-3/4 in.
(451 mm)
C
D
Figure 23 - Roof Framing

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. 17
V
H
H
V
V1
Figure 26 - Top Vent - STRAIGHT
Notes:
• It is very important that the horizontal/in-
clined run be maintained in a straight (no
dips) and recommended to be in a slightly
elevated plane, in a direction away from the
fireplace of 1/4" rise per foot (20 mm per
meter) which is ideal, though rise per foot
run ratios that are smaller are acceptable all
the way down to at or near level.
• SV4.5VF (Secure Vent), SF4.5VF (Secure
Flex) firestop/spacer must be used anytime
vent pipe passes through a combustible
floor or ceiling. SV4.5HF (Secure Vent),
SF4.5HF (Secure Flex)firestop/spacer must
be used anytime vent pipe passes through
a combustible wall.
• Two 45 degree elbows may be used in place
of one 90 degree elbow. The same rise to
run ratios, as shown in the venting Figures
for 90 elbows, must be followed if 45 degree
elbows are used.
• AN ELBOW IS ACCEPTABLE AS 1 FOOT OF
VERTICAL RISEEXCEPT WHERE AN ELBOW
IS THE ONLY VERTICAL COMPONENT IN
THE SYSTEM (See Figure 35).
Table B
H Maximum V Minimum
feet (meter) feet (meter)
5 (1.524) Elbow Only
5 (1.524) 1 (0.305)
10 (3.048) 2 (0.610)
15 (4.572) 3 (0.914)
20 (6.096) 4 (1.219)
V + V1+ H = 40 feet (12.2 m) Max.
H = 20 feet (6.096 meters) Max.
A Vent Restrictor, as shown in Figure 18
Page 13, must be used in this application
40 feet
(12.2 meters)
Maximum
WhenusingSecureFlex,useFirestop/Spacer
SF4.5VF
Ceiling Firestop /
Spacer (SV4.5VF)
Ceiling Firestop /
Spacer (SV4.5VF)
Wall Firestop/
Spacer (SV4.5HF)
When using Secure Flex, use Firestop /
Spacer SF4.5VF.
When using Secure Flex, use Firestop /
Spacer SF4.5HF.
Table A
H Maximum V Minimum
feet (meter) feet (meter)
2 (0.610) 1 (0.305)
4 (1.219) 2 (0.610)
6 (1.829) 3 (0.914)
8 (2.438) 4 (1.219)
V + H = 40 feet (12.2 meters) Max.
H = 8 feet (2.4 meters) Max.
Ratio V to H ratio is 1:2
Example: If 8 feet of (H) horizontal vent run
is needed, then 4 feet minimum (V) vertical
vent will be required.
This table shows a 1(V) to 2(H) ratio. For
every 1 foot of (V) vertical, you are allowed 2
feet of (H) horizontal run, up to a maximum
horizontal run of 8 feet.
VERTICAL VENT FIGURES/TABLES
Note: Secure Vent (rigid vent pipe) is shown
in the Figures; Secure Flex (flexible vent pipe)
may also be used.
WARNING
UnderNoCircumstances,May Sepa-
rate Sections of Concentric Flexible
Vent Pipe Be Joined Together.
Figure 27 - Rear Vent - ONE 90 DEGREE ELBOW
Figure 28 - Top Vent - TWO 90 DEGREE ELBOWS
Example: If 20 feet of (H) horizontal vent run
is needed, then 4 feet minimum of (V) vertical
vent will be required.
This table shows a 1(V) to 5(H) ratio. For
every 1 foot of (V) vertical, you are allowed 5
feet of (H) horizontal run, up to a maximum
horizontal run of 20 feet.
An elbow is acceptable as 1 foot of vertical
rise except where an elbow is the only vertical
component in the system. See Figure 35.
When using Secure Flex, use Firestop /
Spacer SF4.5VF.
Ceiling Firestop /
Spacer (SV4.5VF)

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
18
H1
V
V1
H
V
H1
H
V1
Ceiling
Firestop / Spacer
(SV4.5VF)
Ceiling
Firestop / Spacer
(SV4.5VF) Wall Firestop/
Spacer (SV4.5HF)
Wall Firestop/
Spacer (SV4.5HF)
Ceiling
Firestop / Spacer
(SV4.5VF)
Example: If 20 feet total (H+H1)
horizontal vent run is needed,
then 4 feet minimum of (V) verti-
cal vent will be required.
This table shows a 1(V) to 5(H)
ratio. For every 1 foot of (V)
vertical run, you are allowed 5
feet of (H) horizontal run up to a
maximum (H+H1) horizontal run
of 20 feet.
An elbow is acceptable as 1 foot
of vertical rise except where
an elbow is the only vertical
component in the system. See
Figure 35.
Table D
H + H1Maximum V Minimum
feet (meter) feet (meter)
5 (1.524) Elbow Only
5 (1.524) 1 (0.305)
10 (3.048) 2 (0.610)
15 (4.572) 3 (0.914)
20 (6.096) 4 (1.219)
H + H1= 20 feet (6.096 m) Max.
V + V1+ H + H1= 40 ft. (12.192 m) Max.
Table C
H+H1Maximum H Maximum V Minimum
feet (meter) feet (meter) feet (meter)
5 (1.524) 2 (0.610) 1 (0.305)
10 (3.048) 4 (1.219) 2 (0.610)
15 (4.572) 6 (1.829) 3 (0.914)
20 (6.096) 8 (2.438) 4 (1.219)
V + V1 + H + H1= 40 feet (12.2 m) Max
H = 8 feet (2.438 meters) Max.
H + H1= 20 feet (6.096 meters) Max.
Example: If 20 feet total (H+H1) horizontal vent run is needed,
then 4 feet minimum of (V) vertical vent will be required.
This table shows a 1(V) to 5(H) ratio. For every 1 foot of (V)
vertical, you are allowed 5 feet of (H+H1) horizontal run up to a
maximum total horizontal run of 20 feet.
When using Secure Flex, use Firestop / Spacer SF4.5VF
When using Secure Flex, use Firestop / Spacer SF4.5HF
When using Secure Flex, use Firestop / Spacer SF4.5VF
When using Secure Flex, use Firestop / Spacer SF4.5HF
Figure 29 - Rear Vent - THREE ELBOWS
Figure 30 - Top Vent - THREE ELBOWS
VERTICAL VENT FIGURES/TABLES (CONTINUED)

19
NOTE: DIAGRAMS & ILLUSTRA-
TIONS ARE NOT TO SCALE.
Horizontal / Inclined Run
Support Brackets
Building
Support
Framing
SV4.5E90
Elbow
Ceiling
Fireplace
SV4.5L6/12/24/36/48
Vent Sections
Vertical
Rise
SV4.5HT-2
Termination
Shown
Support Bracket Spacing
Every 5 ft (1.52 m)
Exterior
Wall
SV4.5HT-2
Termination
Shown
Figure 31
See Figure 18 on Page 14 or Figure 21 on
Page 15 for vertical vent section support.
TYPICAL HORIZONTAL VENT INSTALLATION
Firestop / Spacer
SV4.5VF
When Using Secure Flex,
Use Firestop / Spacer SF4.5VF
B. Frame exterior wall opening -
Locate the center of the vent outlet on
the exterior wall according to the dimen-
sions shown in Figure 13 on Page 10. Cut
and/or frame an opening, 10-1/2" x 12-1/8"
(267 mm x 308mm) inside dimensions, about
this center.
C. Frame ceiling opening - If the vertical route
isto penetrateaceiling, use plumblineto locate
thecenterabovetheappliance.Cutand/orframe
an opening, 10-1/2" x 10-1/2" (267 mm x 267
mm)insidedimensions,aboutthiscenter(refer
to Figure 19 on Page 15).
D. Attach vent components to appliance - To
attacha ventcomponentto theappliancecollar,
align the dimpled end over the collar, adjust-
ing the radial alignment until the four locking
dimples are aligned with the inlets of the four
incline channels on the collar (refer to Figure
20 on Page 15).
Push the vent component against the collar
until it fully engages, then twist the component
clockwise,runningthedimplesdownand along
the incline channels until they seat at the end
of the channels.
The unitized design of the Secure Vent
components will engage and seal both the
inner and outer pipe elements with the same
procedure. Sealant and securing screws are
not required.
Note: An elbow may also be attached to the
appliance collar. Attach in the same manner
as you would a vent section.
E.Attach vent components to each other - Other
vent sections may be added to the previously in-
stalledsectioninaccordancewiththerequirements
ofthe vent tables. To addanother vent component
to a length of vent run, align the dimpled end of
the component over the inclined channel end of
the previously installed section,
adjustingthe radial alignment until thefourlock-
ing dimples are aligned with the inlets of the four
incline channels of the previous section. Push
theventcomponentagainsttheprevious section
until it fully engages, then twist the component
clockwise running the dimples down and along
the incline channels until they seat at the end of
thechannels.Thisseating positionisindicated
by the alignment of the arrow and dimple as
shown in Figure 20 on Page 15.
F. Install firestop/spacer at ceiling -
WhenusingSecureVent,useSV4.5VFfirestop/
spacerat ceilingjoists;whenusing SecureFlex,
use SF4.5VF firestop/spacer. If there is living
spaceabovetheceilinglevel,thefirestop/spacer
must be installed on the bottom side of the
ceiling. If attic space is above the ceiling, the
firestop/spacermustbeinstalledonthetopside
of the joist. Route the vent sections through the
framed opening and secure the firestop/spacer
with 8d nails or other appropriate fasteners at
each corner.
Remember to maintain 1" (25 mm) clearance
to combustibles, framing members, and attic
or ceiling insulation when running vertical
chimney sections.
G. Support the vertical run sections -
See Section E on Page 15.
H.Changeventdirection -Attransition fromor
toahorizontal/inclinedrun,install theSV4.5E45
and SV4.5E90 elbows in the same manner as
thestraight vent sections. The elbowsfeature a
twistsectiontoallowthemtoberoutedaboutthe
center axis of their initial collar section to align
with the required direction of the next vent run
element. Twist elbow sections in a clockwise
direction only so as to avoid the possiblity of
unlockinganyofthepreviouslyconnectedvent
sections. See Figure 22 on Page 16.
HORIZONTAL (OUTSIDE WALL)
TERMINATION SYSTEM
Figure 31, and Figures 34 to 40 on Pages
21 to 23 and their associated Horizontal Vent
Table illustrate the various horizontal venting
configurations that are possible for use with
theseappliances. SecureVentpipeapplications
are shown in these Figures; Secure Flex pipe
may also be used. A Horizontal Vent Table sum-
marizeseachsystem’sminimumandmaximum
vertical and horizontal length values that can be
used to design and install the vent components
in a variety of applications.
Bothofthesehorizontal ventsystemsterminate
throughan outside wall. Building Codes limit or
prohibit terminating in specific areas. Refer to
Figure 6 on Page 8 for location guidelines.
Secure Vent SV4.5 direct vent system compo-
nents are unitized concentric pipe components
featuring positive twist lock connection, (refer
to Figure 20 on Page 15). All of the appli-
ances covered in this document are fitted with
collars having locking inclined channels. The
dimpled end of the vent components fit over
the appliance collar to create the positive twist
lock connection.
A. Plan the vent run -
Analyze the vent routing and determine the
types and quantities of sections required
4-1/2"(114 mm),10-1/2"(267mm), 22-1/2"(572
mm), 34-1/2" (876 mm) and 46-1/2" (1181 mm)
net section lengths are available. Plan the vent
lengths so that a joint does not occur at the inter-
section of ceiling or roof joists. Make allowances
for elbows as indicated in Figure 22.
Maintain a minimum 1" (25 mm) clearance to
combustibles on the vertical sections. Clear-
ances for the horizontal runs are; 3" (76 mm)
on top, 1" (25 mm) on sides, and 1" (25 mm)
at the bottom.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
20
IMPORTANT
The vent termination is hot while
in operation and for a period of
time following the use of the fire-
place. To prevent contact with hot
surfaces, we recommend the use
of a Termination Guard. See Items
12 and 13 on Page 32. This can be
purchased at your local dealer.
SV4.5 HT-2
Termination
SV4.5 HT-2
Termination
SV4.5 HT-2
Termination
Horizontal terminations have been designed to perform in a wide range of weather condi-
tions. Our terminations meet or exceed industry standards.
When selecting the locations of your horizontal terminations, do not place the termina-
tion where water from eaves and adjoining rooflines may create a heavy flow of cascad-
ing water onto the termination cap. If the cap must be placed where the possibility of
cascading water exists, it is the responsibility of the builder to direct the water away
from the termination cap by using gutters or other means.
Take care to carefully follow the installation instructions for the termination, including
the use of silicone caulking where required.
Figure 33
Figure 32 - INSTALLING SQUARE HORIZONTAL TERMINATION (SV4.5HT-2)
Siding
Stucco
1-1/4” Maximum Recess of
Square Termination
into Exterior Finishing Material
Exterior Surface of
Framing
Exterior Surface of Siding
Maximum Extent of
Vent Run Sections
Relative to Exterior
Surface of Framing
Interior Surface of
Finished Wall
Last Vent Section.
Use Telescopic Vent
Section (SV4.5LA), If
Necessary
Adapter
SV4.5RCH

Use silicone caulking to seal
the top and sides of the
termination, up to the
underlayment, stucco, or
masonry wall surface.

Caulk

Caulk
Maximum Wall Thickness
10 in. (254 mm)
6 in. to 9-1/4 in.
(152 to 235 mm)


10¹⁄₂"
(267mm)
7"
(178)
5¹⁄₈"
(130 mm)
12¹⁄₈"
(308 mm)
Note: Centerline of Vent Piping is
NOT the Same as the Centerline of
the Framed Opening.
6 to 48 inch Vent Section,
Telescopic vent section,
Elbow or Appliance Collar Base of Appliance
3"
(76 mm)
1"
(25.4 mm)
Adapter
SV4.5RCH
To help minimize water infiltration it is
recommended that the Firestop/Spacer
(SV4.5HF) be installed on the exterior
side of the wall.
Venting Connection and Exterior Wall Recessing of the Horizontal Square
Termination (SV4.5HT-2).
See Figure 13 on Page 11 for Min.
Distance to Base of Appliance.
For thicknesses greater
than 10", see Table 12
I. Continue installation of horizontal/inclined
sections - Continue with the installation of the
straight vent sections in horizontal/inclined run
as described in Step E. Install support straps
every 5 ft. (1.52 m) along horizontal/inclined
vent runs using conventional plumber’s tape.
See Figure 31. It is very important that the
horizontal/inclined run be maintained in a
straight (no dips) and recommended to be in
a slightly elevated plane, in a direction away
from the fireplace of 1/4" rise per foot (20 mm
per meter) which is ideal, though rise per foot
run ratios that are smaller are acceptable all the
way down to at or near level.
It is important to maintain the required clear-
ances to combustibles: 1" (25 mm) at all sides
for all vertical runs; and 3" (76 mm) at the top,
1" (25 mm) at sides, and 1" (25 mm) at the
bottom for all horizontal/inclined runs.
J. Assemble vent run to exterior wall - If not
previously measured, locate the center of the
vent at the exterior wall. Prepare an opening as
described in Step B. Assemble the vent system
topointwheretheterminusofthelastsection is
located relative to the exterior surface to which
the termination is to be attached (see Figures
32 & 33 and Table 12 on Page 21.
If the terminus of the last section is not within
this distance, use the telescopic vent section
SV4.5LA, as the last vent section. For wall
thicknesses greater than that shown in Figure
33 and Table 12 on Page 21. This table lists
the additional venting components needed (in
addition to the termination and adapter) for a
particular range of wall thicknesses.
K. Attach termination adapter - Attach the
adapter(adapter-SV4.5RCH- providedwiththe
termination) to the vent section or telescoping
ventsection,elboworappliancecollarasshown
in Figures 32 & 33 in the same manner as any
SV4.5 vent component (refer to Step E).
L. Install Firestop/Spacer at exterior wall
-When using the square termination, install
SV4.5HF (Secure Vent), SF4.5HF (Secure Flex)
Firestop/Spacerover the opening attheexterior
sideof the framing,long side up, with the 3 inch
spacer clearance at the top as shown in Figure
32, and nail into place.
(TheFirestop/Spacermay also be installed over
the opening at the interior side of framing).