Lennox Hearth Products Direct Vent MPD-33 Series User manual

1
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
INSTALLATION
INSTRUCTIONS
VENTED GAS FIREPLACE HEATERS - DIRECT VENT MODELS
P/N 850,014M REV. R 06/2008
MODELS
POURVOTRESÉCURITÉ: Nepasentreposerniutiliser
d'essencenid'autrevapeursouliquidesinflammables
dans le voisinage de cet appareil ou de tout autre
appareil.
POURVOTRESÉCURITÉ: Quefairesivoussentezune
odeur de gaz:
• Ne pas tenter d'allumer d'appareil.
• Netouchezàaucuninterrupteur. Nepasvousservir
des téléphones se trouvant dans le batiment 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'installationetservicedoitêtreexécutéparunqualifié
installeur,agencedeserviceoulefournisseurdegaz.
DIRECT VENT
MPD-33/35/40/45 SERIES
FORYOURSAFETY: Donotstoreorusegasoline
orotherflammablevaporsorliquidsinthevicin-
ity of this or any other appliance.
FORYOURSAFETY: Whatto do if you smellgas:
• 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.
• Ifyourgassuppliercannotbereached,callthe
fire department.
Installation and service must be performed by a
qualified installer, service agency or the gas
supplier.
OTL Report No. 116-F-13-4
A French manual is available upon request. Order Form Number
850,014CF.
Ce manuel d’installation est disponible en francais, simplement
en faire la demande. Numéro de la pièce 850,014CF.
sledoMtlovilliMsledoMcinortcelE
MNC8233-TDPMMNC5304-DPMENC8233-TDPMENC5304-DPM
MPC8233-TDPMB-MNC5304-DPMEPC8233-TDPMEPC5304-DPM
MNC8233-RDPMMPC5304-DPMENC8233-RDPMB-ENC5304-DPM
MPC8233-RDPMMNC0454-DPMEPC8233-RDPMENC0454-DPM
MNC0353-DPMB-MNC0454-DPMENC0353-DPMEPC0454-DPM
B-MNC0353-DPMMPC0454-DPMEPC0353-DPMB-ENC0454DPM
MPC0353-DPMB-ENC0353-DPM
WARNING:IFTHEINFORMATIONINTHISMANUAL
IS NOT FOLLOWED EXACTLY, A FIRE OR EXPLO-
SION MAY RESULT CAUSING PROPERTY DAM-
AGE, PERSONAL INJURY OR LOSS OF LIFE. AVERTISSEMENT: ASSUREZ-VOUS DE BIEN SUIVRE
LESINSTRUCTIONSDONNÉDANSCETTENOTICEPOUR
RÉDUIRE AU MINIMUM LE RISQUE D'INCENDIE OU
POUR ÉVITER TOUT DOMMAGE MATÉRIEL, TOUTE
BLESSURE OU LA MORT.
This appliance may be installed in an aftermarket perma-
nently located, manufactured home (USA only) or mobile
home, where not prohibited by local codes. 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.
In the Commonwealth of Massachusetts:
• Installation must be performed by a licensed plumber or
gas fitter.
See Table of Contents for location of additional
Commonwealth of Massachusetts requirements.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
US

2NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Figure 1
Electronic appliances are designed to operate
on natural or propane gas. An electronic inter-
mittent pilot ignition system provides safe,
efficient operation. External electrical power is
required to operate these units.
TheseappliancescomplywithNationalSafety
Standards and are tested and listed by Omni-
Test Laboratories (Report No. 116-F-13-4) to
ANSIZ21.88(inCanada,CSA-2.33),andCAN/
CGA-2.17-M91 in both USA and 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 mobile homes.
Installationmustconformtolocalcodes.Inthe
absenceof local codes,installation must com-
ply with the current National Fuel Gas Code,
ANSI Z223.1. (In Canada, the current CAN-1
B149 installation code.)
TABLE OF CONTENTS
Packaging........................................ page 2
Introduction..................................... page 2
General Information......................... page 2
Location .......................................... page 4
Appliance and Vent Clearances....... page 4
Vent Termination Clearances ........... page 5
Typical Installation Sequence .......... page 5
Detailed Installation Steps ............... page 6
Step 1. Framing ............................. page 6
Step 2. Routing Gas Line ............... page 6
Fireplace Specifications ................... page 9
Step 3. Install the Venting System. page 9
Requirements for Commonwealth
of Massachusetts .......................... page 9
Vertical Termination Systems .......... page 11
Vent Section Length Chart............... page 11
Vertical Vent Tables and Figures...... page 11
Horizontal Termination System........ page 16
Horizontal Vent Tables and Figures . page 18
Venting Using Flexible Vent Pipe ..... page 21
Step 4. Field Wiring ....................... page 22
Step 5. Optional Blower Kit Wiring page 22
Step 6. Connecting Gas Line.......... page 23
Step 7. Installing Logs................... page 24
Step 8. Checking Unit Operation ..... page 24
Step 9. Installing Glass Door ......... page 24
Step 10. Burner Adjustments........... page 25
Step 11. Hood Installation ............... page 25
Finishing Requirements................... page 25
Cold Climate Insulation.................... page 26
Installation Accessories................... page 27
Gas Conversion Kits.................. page 29
TYPICAL INSTALLATION
DO NOT ATTEMPT TO ALTER OR MODIFY
THECONSTRUCTIONOF THE APPLIANCEOR
ITS COMPONENTS. ANY MODIFICATION OR
ALTERATION MAY VOID THE WARRANTY,
CERTIFICATIONANDLISTINGSOFTHISUNIT.
INTRODUCTION
Thesefireplacesare designed, tested andlisted
foroperationandinstallationwith,andonlywith,
SecureVent™DirectVentSystemComponents,
SecureFlex™FlexibleVentComponentsmanu-
facturedbySecurityChimneysInternationaland
Z-Flex™ Model GA Venting Systems, listed to
UL1777 and ULCS635 manufactured by Flex-
master Canada Limited. These approved vent
system components are labeled for identifica-
tion. DONOTuseanyothermanufacturer'svent
components with these appliances.
Millivolt appliancesaredesignedtooperateon
natural or propane gas. A millivolt gas control
valvewith piezoignitionsystemprovidessafe,
efficient operation. External electrical power is
required to operate the optional blower if in-
stalled in these units.
GENERAL INFORMATION
Note: Installation and repair should be per-
formedbyaqualifiedserviceperson.Theappli-
ance should be inspected annually by a quali-
fied professional service technician. More fre-
quent inspections and cleanings may be re-
quired due to excessive lint from carpeting,
bedding material, etc. It is imperative that the
control compartment, burners and circulating
airpassagewaysoftheappliancebekeptclean.
S'assurerquelebrùleuretlecompartimentdes
commandes sont propres. Voir les instruc-
tions 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.
Theseappliancesare designed tooperateon
natural or propane gas only.
Millivolt Models -
Millivolt models come standard with the manu-
ally-modulatedgasvalve;flameappearanceand
heat output can be controlled at the gas valve.
Please read and understand these
instructions before beginning your
installation.
This installation manual will help you obtain a
safe, efficient, dependable installation for your
appliance and vent system.
PACKAGING
The assembled vented gas fireplace heater is
packaged with:
1 - one log set located in firebox area.
2 - one envelope containing the literature
package which consists of the homeowner's
manual,installationinstructions,logsetsupple-
ment and warranty; envelope is located in the
control area.
3-oneventrestrictortobeappliedasshownon
page 10; restrictor is taped to the envelope.
4 - one hood located behind the top panel.
5- onebagofdecorativevolcanicstonelocated
in the control area.
6 - one bag of glowing embers located in the
control area.
7-onebagofvermiculitelocatedincontrolarea.
ElectricalwiringmustcomplywiththeNational
ElectricalCodeANSI/NFPA70-(latestedition).
(In Canada, the current CSA C22-1 Canadian
Electrical Code.)
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

3
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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0454-DPM63#25#
Table 1
Test gage 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 gage connection is
provided at the inlet and outlet side of
the electronic gas control valve.
Minimuminletgaspressuretotheseappliances
is5.0 incheswatercolumn(1.24kPa)fornatural
gas and 11 inches water column (2.74 kPa) for
propane for the purpose of input adjustment.
Maximum inlet gas supply pressure to these
appliances is 10.5 inches water column (2.61
kPa) for natural gas and 13.0 inches water
column (3.23 kPa) for propane.
Donotusetheseappliancesifanyparthasbeen
under water. Immediately call a qualified,
professional service technician to inspect the
appliance and to replace any parts of the con-
trol system and any gas control which have
been under water.
Themillivoltappliancesaremanuallycontrolled
andfeatureasparkignitor(piezo)thatallowsthe
appliance's pilot gas to be lit without the use of
matches or batteries. This system provides
continuedserviceintheeventofapoweroutage.
These appliances must be isolated from the gas
supplypipingsystem (by closingtheir individual
manual shut-off valve) during any pressure test-
ing of the gas supply piping system at test pres-
sures equal to or less than 1/2 psig (3.5 kPa).
Theseappliancesandtheirindividualshut-offvalves
mustbe disconnectedfrom thegassupply piping
systemduringanypressuretestingofthatsystem
at pressures in excess of 1/2 psig (3.5 kPa).
Theseappliances must notbe connected toa
chimney or flue serving a separate solid fuel
burning appliance.
These heater rated appliances are intended
for use as supplemental heaters only.
Carbon Monoxide Poisoning: Early signs of
carbon monoxide poisoning are similar to
the flu with headaches, dizziness and/or
nausea.Ifyouhavethesesigns,obtainfresh
air immediately. Turn off the gas supply to
the appliance and have it serviced by a
qualified professional, as it may not be op-
erating correctly.
Installations at Altitudes of 0 to 4500 ft.-
Unitsaretestedandapprovedforelevations
of 0 to 4500 feet (0 to 1372 meters).
Installations at Altitudes above 4500 ft.-
For elevations above 4500 feet (1372
meters), install the unit according to the
regulations of the local authorities having
jurisdictionand,intheUSA,thelatestedition
oftheNationalFuelGasCode(ANSIZ223.1)
or, in Canada, the latest edition of the
CAN1-B149.1and.2codes.
Electronic Models -
Electronic models have a fixed rate gas valve.
Input of electronic models is shown in the
following table:
All Models -
Maximum manifold pressure is 3.5 in. w.c.
(0.87 kPa) for natural gas and 10 in. w.c.
(2.49 kPa) for LP/Propane gas.
Table1 showstheunits'gasorificesizefor
theelevationsindicated.
This appliance may be installed in an after-
market permanently located, manufactured
home (USA only) or mobile home, where
not prohibited by local codes. This appli-
ance is only for use with the type of gas
indicated on the rating plate. This appli-
ance is not convertible for use with other
gases, unless a certified kit is used.
Cet appareil peut être installé dans un maison
préfabriquée(É.-U.seulement)oumobile déjà
installéeàdemeuresilesréglementslocauxle
permettent.
Cet appareil doit être utilisé uniquement avec
les types de gaz indiqués sur la plaque
signalétique. Nepasl'utiliseravecd'autresgaz
saufsiunkitdeconversioncertifiéestinstallé.
Ne pas se servir de cet appareil s'il a étéplongé
dansl'eau,complètementou enpartie. Appeler
untechnicienqualifiépourinspecterl'appareilet
remplacertoutepartiedusystèmedecontrôleet
toutecommandequiontétéplongésdansl'eau.
Input of millivolt models is shown in the
following table:
WARNING: FAILURE TO COMPLY WITH
THEINSTALLATIONANDOPERATINGIN-
STRUCTIONSPROVIDEDINTHISDOCU-
MENT WILL RESULT IN AN IMPROP-
ERLY INSTALLED AND OPERATING AP-
PLIANCE, VOIDING ITS WARRANTY.
ANYCHANGETOTHISAPPLIANCEAND/
ORITS OPERATING CONTROLSISDAN-
GEROUS. IMPROPER INSTALLATION
ORUSEOFTHISAPPLIANCECANCAUSE
SERIOUSINJURYORDEATHFROMFIRE,
BURNS,EXPLOSIONORCARBON MON-
OXIDE POISONING.
WARNING: CHILDREN AND ADULTS
SHOULD BE ALERTED TO THE HAZARDS
OFHIGHSURFACETEMPERATURES.USE
CAUTION AROUND THE APPLIANCE TO
AVOID BURNS OR CLOTHING IGNITION.
YOUNG CHILDREN SHOULD BE CARE-
FULLYSUPERVISEDWHENTHEYAREIN
THE SAME ROOM AS THE APPLIANCE.
WARNING: DO NOT PLACE CLOTHING
OR OTHER FLAMMABLE MATERIALS
ON OR NEAR THIS APPLIANCE.
AVERTISSEMENT: SURVEILLER LES
ENFANTS. GARDER LES VÊTEMENTS,
LESMEUBLES,L'ESSENCEOUAUTRES
LIQUIDES À VAPEUR INFLAMMABLES
À COTE DE L'APPAREIL.

4NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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
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0353-DPM 2/164)1811(4/184)6221(34/15)598(34/15)598(
5304-DPM 0454-DPM 2/115)8031(4/135)3531(4/104)2201(4/104)2201(
KCAB )mm31(.ni2/1 srecaps)mm0(.ni0
SEDIS **)mm31(.ni2/1 srecaps)mm0(.ni0
SRECAPSPOT)mm0(.ni0
ROOLF)mm0(.ni0
mottoBmorF ottinUfo gnilieC )mm6261(.ni46
TNEV*)mm4.52(.ni1
SECNARAELCECIVRES
TNORF)sretem9.0(.teeF3
(Rear Vent Application
HORIZONTAL VENT
without a chase)
HORIZONTAL VENT
(Rear Vent Application
With a chase)
HORIZONTAL VENT
(Top Vent
Application)
VERTICAL VENT
(Top Vent
Application)
(Rear Vent
VERTICAL VENT
Application)
APPLICATION
REAR VENT
APPLICATION
TOP VENT
APPLICATION
TOP VENT
REAR VENT
APPLICATION
TOP VENT
APPLICATION
RECESSED
INSTALLATION
TOP VENT
APPLICATION
APPLICATION
TOP VENT
APPLICATION
TOP VENT
Figure 2
Figure 3
*Note: 3in.(75mm)aboveanyhorizontal/
inclined vent component.
**Note: See page 5, step 1 for clearance
requirements to the nailing flange located
at each side of the unit and any screw
heads adjacent to it.
Table 2
APPLIANCE AND VENT CLEARANCES
The appliance is approved with zero clearance
to combustible materials on all sides (as de-
tailedin Table2) ,withthefollowingexception:
When the unit is installed with one side flush
withawall,thewallontheothersideoftheunit
must not extend beyond the front edge of the
unit.Inaddition,whenthe unitisrecessed, the
sidewallssurroundingtheunitmustnotextend
beyondthefrontedgeoftheunit.See
Figure2 .
Typical Locations
The appliance should be mounted on a fully
supported base extending the full width and
depthoftheunit.Theappliancemaybelocated
on or near conventional construction materi-
als.However,ifinstalledoncombustiblemate-
rials, such as carpeting, vinyl tile, etc., a metal
or wood barrier covering the entire bottom
surface must be used.
LOCATION
In selecting the location, the aesthetic and
functional use of the appliance are primary
concerns.However,ventsystemroutingtothe
exterior and access to the fuel supply are also
important. Due to high temperatures the
appliance should be located out of traffic
and away from furniture and draperies.
Consideration should be given to traffic ways,
furniture, draperies, etc., due to elevated sur-
face temperatures (
Figure 2 ). The location
should also be free of electrical, plumbing or
other heating/air conditioning ducting.
Thesedirectventappliancesareuniquelysuited
for installations requiring a utility shelf posi-
tioneddirectlyabovethefireplace.Utilityshelves
likethesearecommonlyused forlocatingtele-
vision sets and decorative plants.
Toprovideforthelowestpossibleshelfsurface
use the alternate rear vent outlet with attached
venting routed in a way to minimize obstruc-
tions to the use of the space above the appli-
ance. Do not insulate the space between the
applianceandtheareaaboveit.See
Figure3 .
Theminimumheightfrom thebaseoftheappli-
ance to the underside of combustible materials
usedto constructa utilityshelf inthisfashionis
shown in the table in
Figure 3 .

5
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
hctiPfooR H)teef(
21/6ottalF0.1
21/7ot21/6revO52.1
21/8ot21/7revO5.1
21/9ot21/8revO0.2
21/01ot21/9revO5.2
21/11ot21/01revO52.3
21/21ot21/11revO0.4
Figure 4
Figure 5 - Side Elevation View
3"
(76 mm)
12"
(305 mm)
Termination Kit
Combustible Projection
greater than inches in length
Combustible Projection
2-1/2inches or less in length
18"
(457 mm)
Ventilated
Soffit Unventilated
Soffit
Horizontal Vent Termination Clearances
2-1/2
Termination Kit
All horizontal terminations
may be located as close
as 6” (152mm) to any
(non-combustible and
combustible) exterior
sidewall. This distance
may be decreased to
2” (51mm) for non-
combustible exterior
sidewalls only, if the
SV4.5HT-2 termination
is used.
Horizontal Vent Termination Clearances
The horizontal vent termination must have a
minimumof 3" (76mm) clearance toany over-
headcombustibleprojectionof2-1/2"(64mm)
or less. See Figure 5. For projections exceed-
ing2-1/2" (64mm),see Figure5 . Allhorizontal
terminations may be located as close as 6"
(152mm) to any (non-combustible and com-
bustible) exterior sidewall. This distance may
be decreased to 2" (51mm) for non-combus-
tible exterior sidewalls only, if the SV4.5HT-2
terminationisused. Foradditionalventlocation
restrictions refer to Figure 8 on page 7 .
Terminate multiple vent terminations accord-
ing to the installation codes listed on this
page.
Vertical Vent Termination Clearances
VENT TERMINATION CLEARANCES
Theseinstructionsshouldbeusedasaguide-
lineand do notsupersedelocal codes inany
way. Install vent according to local codes,
theseinstructions,the current NationalFuel
Gas Code (ANSI-Z223.1) in the USA or the
current standards of CAN/CGA-B149.1 and -
B149.2 in Canada.
Terminatesingle ventcapsrelativetobuilding
components according to Figure 4 .
Step 3. (page 9) Installtheventsystemand
exterior termination.
Step 4. (page 22) Field Wiring
a. Millivolt Appliances –Install the operating
control switch (not factory provided) and
bringinelectricalservicelineforforcedair
circulating blower (optional equipment).
b. Electronic Appliances –Field wire and
install operating control switch.
Step 5. (page 22) Install blower kit (optional
equipment).
Step 6. (page 23) Make connection to gas
supply.
Step 7. (page 24) Install the logs, decora-
tive volcanic stone and glowing embers.
Step 8. (page 24) Checkout appliance op-
eration.
Step 9. (page 24) Install glass door frame
assembly.
Step 10. (page 25) Adjust burner to ensure
proper flame appearance.
Step 11. (page 25) Install the hoods.
TYPICAL INSTALLATION SEQUENCE
The typical sequence of installation follows,
however,eachinstallationisuniqueresultingin
variations to those described.
Seethepagenumbersreferencesinthefollow-
ing steps for detailed procedures.
Step 1. (page 6) Construct the appliance
framing. Position the appliance within the
framing and secure with nailing brackets.
Step 2. (page 6) Route gas supply line to
appliance location.
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

6NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Figure 7
Right Side
Front Corner of
Fireplace Framing
6-1/2"
(152 mm)
3"
(76 mm)
Step 1. FRAMING
Frametheseappliances asillustratedin Figure
9 on page 8, unless the appliance is to be
installed in a corner . See Figure 10 on page 8
for corner framing installations. All framing
details must allow for a minimum clearance to
combustible framing members as shown in
Table 2 .
Step 2. ROUTING GAS LINE
Routea1/2"(13mm)gaslinealongtheinside
oftherightsideframingasshownin
Figure7 .
Gas lines must be routed, constructed and
madeofmaterialsthatareinstrictaccordance
with local codes and regulations. All appli-
ancesare factory-equipped witha flexiblegas
lineconnectorand1/2inchshutoffvalve.(See
step 6 on page 23).
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
glass door. Remove the top panel. Remove
thecardboard from underneaththe pressure
reliefplates. Pressinsimultaneously theleft
and right side of the bottom hinged panel, to
release it. Lower the bottom hinged panel.
Open the two latches (located under the fire-
box floor) securing the glass door. Remove
thedoorbytiltingitoutwardatthebottomand
lifting it up. Set the door aside protecting it
from inadvertent damage. See Figure 53 on
page 24.
Thefireplaceshouldbesecuredtothesidefram-
ingmembersusingtheunit'snailingflanges-one
topandbottomoneachsideofthefireplacefront.
See
Figure 6. Use 8d nails or their equivalent.
Iftheapplianceistobeelevatedabovefloorlevel,
asolidcontinuousplatformmustbeconstructed.
Headers may be in direct contact with the
appliance top spacers but must not be sup-
portedby themor notchedto fitaround them.
All construction above the appliance must be
selfsupporting.DO NOTuse theappliancefor
structural support.
Figure 6
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

7
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Figure 8
EXTERIOR HORIZONTAL VENT TERMINATION CLEARANCE REQUIREMENTS
V
VV
VV
F
C
Fixed
Closed
Window
Operable
Window
B
B
A
B
H
M
I
= Area where Termination is not Permitted
= Air Supply Inlet
X
= Vent Termination
V
D
V
3 ft.
3 ft.
AA
A
= 9” in U.S.
= 12” in Canada
V
L
B
J
X
V
A
G
Inside
Corner Detail
B
C
C
C
*18”
Ventilated Soffit
Horizontal
Termination
Detail D
Exterior Wall Center Line
of Termination
18”
Inside Corner
* See Item D in the Text Below.
V
P
V
O
NN
Q
NOTE: Local Codes Or Regulations
May Require Different Clearances.
NOTE: Location Of The Vent Termination
Must Not Interfere With Access To The
Electrical Service.
*noitallatsnInaidanaC**noitallatsnISU
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8NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
.oNledoMABCDEF
8233-TDPM 8233-RDPM .ni8/1332/18461/54361/3714/1425
mm1482321278734616721
0353-DPM .ni8/1532/1758/50461/3914/3828/16
mm29816412301784037651
5304-DPM .ni8/10461/31623/113461/39161/11038/77
mm910145511011784977002
0454-DPM .ni8/1548/36661/516461/39161/3334/39
mm641168612911784348842
C
Back wall of chase/enclosure
(including any finishing materials)
a
7 (178)
b
Note-
Venting requirements for rear vent applications in corner installations -
- the horizontal vent length “a” to “b,” must not exceed 28 inches (711 mm)
Inches
(millimeters)
MPDT-3328 AND MPDR-3328 Models -
Dimensions A to F occur when one 45 degree elbow
is connected directly to the appliance collar.
MPD-3530, MPD-4035 and MPD-4540 Models -
Dimensions D and F occur when one 45 degree
elbow is connected directly to the appliance collar.
MPD and MPDR units
D
E
F
A
B
MPD and MPDT units
.oNledoMABCDE
8233-TDPM .ni4/1334/133-----4/3738/721
mm548548-----959723
8233-RDPM .ni4/1334/1338/591-----8/721
mm548548894-----723
0353-DPM .ni4/1534/15361/11124/39361
mm5985981550101604
5304-DPM .ni4/1044/10461/11624/34461
mm220122018767311604
0454-DPM .ni4/1544/10461/11624/34461
mm941122018767311604
A
BD
7
(178)
5-1/8 12-1/8
(308)
10-1/2
( 267 )
C
VENT FRAMING -
TOP VENT WITH ONE
90° ELBOW
VENT FRAMING -
REAR VENT WITH
NO ELBOWS
Framing should be constructed
of 2x4 or larger lumber.
Inches (mm)
E
(130)
(130)
7
(308)
(178)
E is the required framing depth dimension when the
finish material (drywall) thickness is 1/2 in. (13mm).
1/2 A
FRAMING WITH SQUARE HORIZONTAL TERMINATION (SV4.5HT-2)
5-1/8 12-1/8
Figure 9
Figure 10
Framing Dimensions
FIREPLACE FRAMING SPECIFICATIONS
Corner Framing with Square Termination (SV4.5HT-2)

9
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
G
E
B
D
C
F**
H
N
1/2 (13)
1-5/8
(42)
L
K
Top View NOTE - Eyebrow
hood shown as positioned
in louvered front model.
*CONCENTRIC FLUE
FLUE - 4-1/2 (114)
COMBUSTION AIR - 7-1/2 (190)
FRAMING
SPACERS
(Top and Sides
and Rear)
GAS INLET
(Either Side
and bottom)
* MPD models have a top and rear vent
Front View
3 (76)
(Louvered Front Model Shown)
**Rear vent models only
ELECTRICAL
INLET
2-3/4 x 2 (70 x 51)
COVER PLATE with
KNOCKOUT)
Right Side View
MPDR models have only a rear vent
MPDT models have only a top vent
J
M
* *Note 1 - Collars protrude one inch on MPDT-3328 and MPDR-3328 models.
* *See Note 1
* * See Note 1
6 (152)
1-3/8 (35)
OPTIONAL ELECTRICAL
INLET KNOCKOUT,
REQUIRING A FIELD
PROVIDED JUNCTION BOX
(Either Side)
A
.oNledoMABCDEF**GHJKLMN
8233-TDPM 8233-RDPM .ni8/1338/103712/1728/1338/5912/1124/30161/316323/1183/2231
mm1485672349961488946453723716721207033
0353-DPM .ni8/1538/123912/1928/15361/11128/742161/72939361
mm2986183849472981552366130226702267604
5304-DPM .ni8/1048/173422/1438/10461/11628/792161/514939361
mm910134901667891018769579730226702267604
0454-DPM .ni8/1048/173422/1938/15461/11628/74361/771939361
mm6411349016300164118766883440226702267604
Step 3. INSTALL THE VENT SYSTEM
General Information
Theseinstructionsshouldbeusedasaguide-
lineand do notsupersedelocal codes inany
way. Install vent according to local codes,
theseinstructions,the current NationalFuel
Gas Code (ANSI-Z223.1) in the USA or the
current standards of CAN/CGA-B149.1 and -
B149.2 in Canada.
Thesefireplacesaredesigned,testedand
listed for operation and installation with,
andonlywith, Secure Vent™DirectVent
SystemComponents, Secure Flex™Flex-
ible Vent Components manufactured by
Security Chimneys International and Z-
FLEX™Model GA Venting Systems listed
toUL1777andULCS635manufacturedby
Flexmaster Canada Limited.
These approved vent system components
arelabeledforidentification. DONOTuse
anyothermanufacturer'sventcomponents
with these appliances. These fireplaces
must be vented directly to the outside.
Massachusetts And New York City, NY
Requirements
Theseappliancesareapprovedforinstallation
in the following USA locations listed in the
following:
Massachusetts:
These fireplaces are approved for installation
intheUSstateofMassachusettsifthefollow-
ing additional requirements are met-
•Installation and repair must be done by a
plumberorgasfitterlicensedintheCommon-
wealth of Massachusetts.
•Theflexiblegaslineconnectorusedshallnot
exceed 36 inches (92 centimeters) in length.
•The individual manual shut-off must be a T-
handle type valve.
Figure 11
FIREPLACE SPECIFICATIONS

10 NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
VENT SEAL PLATE
GASKET
FIREBOX TOP
CABINET TOP SECURING
SCREWS
VENT
COVER PLATE
TOP VENT
ON MPD-3530/4035/4540 SERIES MODELS
(COMBINED TOP AND REAR VENT UNITS)
TOP VENT SEAL & COVER PLATE REMOVAL
WHEN USING THE TOP VENT
COVER PLATE
SECURING SCREWS
CROSS SECTION
(INSIDE UNIT)
(OUTSIDE UNIT)
VENT SEAL PLATE
GASKET
SECURING
SCREWS
CROSS SECTION
LINTEL
SECURING
SCREWS
LINTEL
REAR VENT
COVER PLATE
SECURING SCREWS
ON MPD-3530/4035/4540 SERIES MODELS
(COMBINED TOP AND REAR VENT UNITS)
REAR VENT SEAL & COVER PLATE REMOVAL
WHEN USING THE REAR VENT
CABINET BACK
(INSIDE UNIT) (OUTSIDE UNIT)
A vent restrictor may be needed when
vertically terminating the vent system above
the roof (when using the appliance top vent),
install vent restrictor in the top vent of the
fireplace outlet on MPD-3530/4035/4540
and MPDT-3328 series models.
RESTRICTOR
APPLIANCE TOP
VENT OUTLET
VENT RESTRICTOR INSTALLATION
(TOP VENT)
If needed, install the restrictor orientated as
shown, either from inside or outside the unit,
in the inner fireplace collar.
INNER
FIREPLACE
COLLAR
RESTRICTOR
APPLIANCE REAR
VENT OUTLET
A vent restrictor may be needed when
horzontally terminating the vent system from
the rear of the appliance (when using the
appliance rear vent), install vent restrictor in
the rear vent of the fireplace outlet on
MPD-3530/4035/4540 series models, in any
installation that has a vertical vent run in
excess of three feet (0.914 meters).
VENT RESTRICTOR INSTALLATION
(REAR VENT)
INNER FIREPLACE
COLLAR
If needed, install the restrictor orientated as
shown, either from inside or outside the unit,
in the inner fireplace collar.
Figure 12
Figure 14
Figure 15
Figure 13
Select Venting System - Horizontal or Vertical
With the appliance secured in framing, deter-
mine vent routing and identify the exterior
termination location. The following sections
describe vertical (roof) and horizontal (exte-
rior wall) vent applications. Refer to the sec-
tion relating to your installation. A list of
approved venting components is shown in
thetwotableson page27andthetwotables
on page 28.
Installation of Vent Restrictor
Aventrestrictormaybeneededwiththisappli-
ance, install vent restrictor (provided) in the
appliancetopflueoutletasshownin
Figure14
(MPDT-3328,MPD-3530,MPD-4035andMPD-
4540) orrear flueoutletas shownin Figure 15
(MPD-3530, MPD-4035 and MPD-4540) . It is
held in place by friction, only.
WARNING: FAILURE TO REINSTALL AND
SECURELY TIGHTEN COVER PLATE
SCREWSCOULD RESULT INLEAKAGEOF
FLUEPRODUCTSINTOTHELIVINGSPACE.
VENTCOVERPLATEANDVENTSEALPLATE
MUSTREMAINSECURELYINSTALLEDON
UNUSED VENT COLLAR. FAILURE TO DO
SO COULD RESULT IN LEAKAGE OF FLUE
PRODUCTS INTO LIVING SPACE.
MassachusettsHorizontalVentRequirements
Inthe Commonwealth ofMassachusetts,hori-
zontal terminations installed less than seven
(7) feet above the finished grade must comply
with the following additional requirements:
•Ahardwired carbonmonoxidedetector with
analarmandbatteryback-upmustbeinstalled
on the floor level where the gas fireplace is
installed. Thecarbonmonoxidedetectormust
comply with NFPA 720, be ANSI/UL 2034
listed and be ISA certified.
•Ametalorplasticidentificationplatemustbe
permanently mounted to the exterior of the
building at a minimum height of eight (8) feet
above grade and be directly in line with the
horizontaltermination. Thesignmustread,in
print size no less than one-half (1/2) inch in
size, GAS VENT DIRECTLY BELOW. KEEP
CLEAR OF ALL OBSTRUCTIONS.
New York City, NY:
These fireplaces are approved for installation
in New York City in the US state of New York.
The vent system may not service multiple
appliances,and must neverbe connected toa
flueservingasolidfuelburningappliance.The
vent pipe is tested to be run inside an enclos-
ingwall(suchasachase).Thereisnorequire-
mentforinspectionopeningsin theenclosing
wall at any of the joints in the vent pipe.
Preparing the Appliance Vent Collar on
MPD-3530/4035/4540Series (Combined
Top and Rear Vent) Models
Each of the unit's two vent collars are sealed
with a cover plate and a seal plate and gasket.
The cover, and seal plate and gasket must be
removed from the vent collar being used.
Refer to
Figure 12 for top vent usage and
Figure 13 for rear, and the following steps to
prepare the appropriate collar for use.
Fromtheventcollarbeingused,removethefour
screws securing the vent seal plate and gasket.
Remove and discard the seal plate and gasket.
When the top vent collar is being used, from
insidethefirebox,loosenthetwoscrewsinthe
keyholeslotsofthecoverplateandremovethe
remaining two cover plate securing screws.
Removeanddiscardthecoverplate. Reinstall
and securely tighten all four screws.
Whentherearventcollarisbeingused,from
inside the firebox, remove the two screws
securing the lintel to the rear wall of the fire-
box, then remove the lintel. Remove the four
cover plate securing screws. Remove and
discard the cover plate.
Reinstall and securely tighten all four cover
plate screws. Re-secure the lintel to the rear
wall of the firebox.

11
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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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
TRAHCHTGNELNOITCESTNEV
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44121100034
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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
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
Figure 16
VERTICAL TERMINATION SYSTEMS (ROOF)
Figure 16, and Figures 26 through 30 on
pages 14 and 15 and their associated
VerticalVentTables illustratethevariousverti-
calventing configurationsthat arepossible for
use with these appliances. Secure Vent pipe
applicationsareshowninthesefigures;Secure
Flex pipe may also be used. A Vertical Vent
Table summarizes each system’s minimum
and maximum vertical and horizontal length
valuesthatcanbeusedtodesignandinstallthe
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-
fiedinANSIZ223.1-(latestedition)(InCanada,
the current CAN-1 B149 installation code) by
major building codes. Always consult your
localcodesforspecificrequirements.Ageneral
guide to follow is the Gas Vent Rule (refer to
Figure 4 on page 5).
Vertical (Straight) Installation
Determinethenumberofstraightventsections
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" (1181 mm) net section lengths are avail-
able. 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.

12 NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Figure 20
To add another vent component to a length of
ventrun,alignthedimpledendovertheinclined
channel end of the previously installed section,
adjusting the radial alignment until the four
lockingdimplesarealignedwiththeinletsofthe
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
theendofthechannels.Thisseatingpositionis
indicated by the alignment of the arrow and
dimple as shown in
Figure 19.
D. Install firestop/spacer at ceiling - When
usingSecureVent,useSV4.5VFfirestop/spacer
at ceiling joists; when using Secure Flex, use
SF4.5VFfirestop/spacer.Ifthereislivingspace
abovetheceilinglevel,thefirestop/spacermust
beinstalledon thebottomsideoftheceiling.If
attic space is above the ceiling, the firestop/
spacer must be installed on the top side of the
joist.Routetheventsectionsthroughtheframed
openingandsecurethefirestop/spacerwith8d
nails or other appropriate fasteners at each
corner. Remember to maintain 1" (25 mm)
clearance to combustibles, framing mem-
bers, and attic or ceiling insulation when
runningverticalchimneysections.Atticinsu-
lation shield (96K94) may be used to obtain
the required clearances indicated here. See
installation accessories table on page 27.
E. Support the vertical vent run sections -
Note - Proper venting support is very impor-
tant. The weight of the vent must not be
supported by the firplace in any degree.
Support the vertical portion of the venting
systemevery8feet(2.4m)abovethefireplace
vent outlet.
10-1/2” Min.
(267 mm)
10-1/2” Min.
(267 mm)
First Vent
Component
Align the dimple (four places)
with the opening of the locking
incline channel on appliance
collar. Twist vent component
clockwise to engage and seal.
Locking
Incline Channel
Dimple
Appliance collar
Vent / Appliance Collar
Connection
Align the dimple (four places) of the
upper vent section with the opening of
the locking incline channel on the
lower vent section. Twist vent
component clockwise to engage and
seal until arrow and dimple align.
Locking
Incline Channel
Dimple
Arrow
Connected
Vent Sections
Vent / Vent Section
Connection
Arrow
Arrow
Figure 17
Figure 19
Figure 18
All of the appliances covered in this document
are fitted with collars having locking inclined
channels.Thedimpledend oftheventcompo-
nents fit over the appliance collar to create the
positive twist lock connection.
Vertical (Offset) Installation
Analyzetheventroutinganddeterminethequan-
tities of vent sections and number of elbows
required. Refer to Vertical Vent Figures and
Tables on page 14 and 15 to select the type of
vertical installation desired. Vent sections are
availablein net lengths of4-1/2" (114 mm),10-
1/2"(267mm),22-1/2"(572mm),34-1/2"(876
mm)and46-1/2" (1181 mm).Referto the Vent
Section Length Chart on page 10 for an aid in
selectinglengthcombinations.Elbowsareavail-
able in 90°and 45°configurations. Refer to
Figure 21 on page 13 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
with an option in installing in tight and confined
spaces or where the vent run made up of fixed
length pieces develops a joint in a undesirable
location,orwillnotbuilduptotherequiredlength.
The SV4.5LA Telescopic Vent Section has an
effectivelengthoffrom1-1/2"(38mm)to7-1/2"
(191 mm). The SV4.5LA is fitted with a locking
inclined channel end (identical to a normal vent
section component) and a plain end with 3 pilot
holes.Slipthe plainendover thelockingchannel
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"x10-1/2" (267mmx267mm)
inside dimensions, about this center mark
(
Figure 17 ).
To attach a vent component to the appliance
collar, align the dimpled end over the collar,
adjusting the radial alignment until the four
locking dimples are aligned with the inlet of
thefourinclinedchannelsonthecollar (refer
to Figure 18 ) . Push the vent component
against the collar until it fully engages, then
twist the component clockwise, running the
dimplesdownand alongtheincline channels
untiltheyseat attheendofthechannels.The
unitized design of the Secure Vent compo-
nentswillengage andsealboththeinnerand
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.Attachventcomponentstoeachother-Other
vent sections may be added to the previously
installedsectioninaccordancewiththerequire-
ments of the vertical vent figures and tables.
B. Attach vent components to appliance -
SecureVentSV4.5directventsystemcompo-
nents are unitized concentric pipe compo-
nents featuring positive twist lock connec-
tions (
see Figure 18 ).
1 inch
(25.4 mm)
minimum
clearance to
combustibles
Support Straps
(Plumber’s tape)
8 feet (2.4 m)
Maximum
Blocking

13
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Figure 22
Figure 23 Figure 25
Figure 24
Iftheventsystemextendsmorethan5'(1.5m)
abovetheroofflashing,stabilizersmaybenec-
essary.Additionalscrewsmaybeusedatsection
joints for added stability. Guide wires may be
attached to the joint for additional support on
multiple joint configurations.
G.Continueinstallationofhorizontal/inclined
sections-Continuewiththeinstallationofthe
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 16, 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
of1/4"riseperfoot(20mmpermeter)whichis
ideal, though rise per foot run ratios that are
smallerareacceptableallthewaydowntoator
nearlevel.Use a carpenter’slevel to measure
fromaconstantsurfaceandadjustthesupport
straps as necessary.
Itisimportanttomaintain therequiredclear-
ancestocombustibles:1"(25mm)atallsides
forallverticalruns;and3"(76mm)atthetop,
1" (25 mm) at sides, and 1" (25 mm) at the
bottom for all horizontal/inclined runs.
Figure 21
One method of support is by utilizing field
provided support straps (conventional
plumber's tape). Secure the plumber's tape
totheframingmemberswithnailsorscrews.
Loop the tape around the vent, securing the
ends of the tape to the framing. If desired,
sheet metal screws #6 x 1/2" length may be
usedtosecurethesupportstrapstothevent
pipe. Refer to Figure 20.
F. Change vent direction to horizontal/in-
clinedrun - Attransitionfrom ortoahorizon-
tal/inclined run, install the SV4.5E45 and
SV4.5E90 elbows in the same manner as the
straight vent sections. The elbows feature a
twistsection toallowthem tobe routedabout
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 any of the previously
connected vent sections. See Figure 21 .
K.Install the verticaltermination-Thefinal
step involves installation of the SV4.5CGV-1
Vertical Termination. Extend the vent sec-
tions to the height as shown in the "Vertical
vent termination section" on page 5. The
SV4.5CGV-1VerticalTermination
(Figure25)
canbe installed intheexact samefashion as
any other Secure Vent section. Align the
termination over the end of the previously
installed section, adjusting the radial align-
ment until the four locking dimples of the
termination are aligned with the inlets of the
fourinclinechannels of the lastvent section.
Push the termination down until it fully en-
gages, 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
roofflashingovertheventsectionandposition
such that the vent column rises vertically (use
carpenters level) (
Figure 23 ). Nail along pe-
rimeter to secure flashing or adjust roofing to
overlaptheflashingedgesattopandsidesonly
andtrimwherenecessary.Sealthetopandboth
sidesof theflashing withwaterproof caulking.
J. Install the storm collar - Install the storm
collar, supplied with the flashing, over the
vent/flashingjoint.See
Figure24. Loosenthe
storm collar screw. Slide collar down until it
meets the top of the flashing. Tighten the
adjustingscrew.Applynon-combustiblecaulk-
ingor masticaround thecircumference ofthe
joint to provide a water tight seal.
SV4.5E90
(90°Elbow)
8-1/8"
(206 mm)
Swivel Joint
(360 ° swivel)
4-13/16"
(122 mm)
SV4.5E45
(45°Elbow)
Swivel Joint
(360 ° swivel)
C
D
Storm
Collar
H. Frame roof opening - Identify location for
vent at the roof. Cut and/or frame opening per
Roof Framing Chart and
Figure 22 .
FramingDimensionsforRoof
Pitch C D
0/12 10-1/2 in. 10-1/2 in.
(267 mm) (267 mm)
6/12 10-1/2 in. 12 in.
(267 mm) (305 mm)
12/12 10-1/2 in. 17-3/4 in.
(267 mm) (451 mm)

14 NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
40 feet
(12.2 meters)
Maximum
*Ceiling
Firestop/Spacer
(SV4.5VF)
* When using
Secure Flex, use
Firestop/Spacer
SF4.5VF
Figure 26 - Top Vent - STRAIGHT
VERTICAL VENT FIGURES/TABLES
Note: 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 isideal,though riseper footrun
ratios that are smaller are acceptable all the
way down to at or near level.
Note: SV4.5VF (Secure Vent), SF4.5VF (Secure
Flex)firestop/spacermustbeusedanytimevent
pipe passes through a combustible floor or
ceiling. SV4.5HF (Secure Vent), SF4.5HF (Se-
cureFlex)firestop/spacermustbeusedanytime
vent pipe passes through a combustible wall.
Note: Two 45 degree elbows may be used in
placeofone90degreeelbow.Thesame riseto
run ratios, as shown in the venting figures for
90 elbows, must be followed if 45 degree
elbows are used.
Note: 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 on page 18 ).
Note: Secure Vent (rigid vent pipe) is shown
in the figures; Secure Flex (flexible vent pipe)
may also be used.
Example: If 8 feet of (H) horizontal
vent run is needed, then 4 feet mini-
mum(V)verticalventwillberequired.
Thistableshows a1(V)to2(H)ratio.
Forevery1footof(V)vertical,youare
allowed2feetof(H)horizontalrun,up
toamaximumhorizontalrunof8feet.
Example: If20feetof(H)horizontal
ventrunisneeded,then4feetmini-
mum of (V) vertical vent will be
required.
This table shows a 1 (V) to 5 (H)
ratio. Forevery1footof(V)vertical,
you are allowed 5 feet of (H) hori-
zontal run, up to a maximum hori-
zontal run of 20 feet.
An elbow is acceptable as 1 foot of
vertical rise except where an elbow
istheonlyverticalcomponentinthe
system. See Figure 35.
A Vent Restrictor, as shown in Figure 14 on
Page 10, must be used in this application.
V
H
* Ceiling
Firestop/Spacer
(SV4.5VF)
*When using Secure Flex,
use Firestop/Spacer
SF4.5VF
H
V
V1
*Ceiling
Firestop/Spacer
(SV4.5VF)
**Wall
Firestop/Spacer
(SV4.5HF)
**When using Secure
Flex, use Firestop/Spacer
SF4.5HF
*When using Secure Flex,
use Firestop/Spacer
SF4.5VF
TABLE A
H Maximum V Minimum
feet feet
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
(meters) (meters)
TABLE B
H Maximum V Minimum
feet (meters) feet
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.
(meters)
WARNING: UNDER NO CIRCUMSTANCES MAY SEPARATE 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

15
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
H1
V
V1
H
*Ceiling
Firestop/Spacer
(SV4.5VF)
**Wall
Firestop/Spacer
(SV4.5HF)
*Ceiling
Firestop/Spacer
(SV4.5VF)
*When using Secure Flex,
use Firestop/Spacer
SF4.5VF
**When using Secure
Flex, use Firestop/Spacer
SF4.5HF
TABLE C
H
+H1
Maximum HMaximum V Minimum
feet feet feet
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.
(meters) (meters)
(meters)
TABLE D
H + H
1
Maximum V Minimum
feet feet
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 + H
1
= 20 feet (6.096 m) Max.
V + V
1
+ H + H
1
= 40 ft. (12.192 m) Max.
(meters) (meters)
V
H1
H
V1
*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
Example: If20feetof(H)horizontalventrunisneeded,then
4 feet minimum of (V) vertical vent will be required.
Thistableshowsa1(V)to5(H)ratio. Forevery1footof(V)
vertical,youare allowed 5 feetof(H) horizontal run,upto a
maximum horizontal run of 20 feet.
Figure 29 - Rear Vent - THREE ELBOWS
Figure 30 - Top Vent - THREE ELBOWS
Example: If20 feetof(H) horizontalventrun isneeded,then 4feet
minimum of (V) vertical vent will be required.
Thistableshowsa1(V)to5(H)ratio. Forevery1footof(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
elbowisthe only verticalcomponent in thesystem. SeeFigure 35.
VERTICAL VENT FIGURES/TABLES
(continued)

16 NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Vertical
Rise
SV4.5E90
Elbow
Horizontal / Inclined Run SV4.5HT-2
Termination
Firestop/Spacer
SV4.5L6/12/24/36/48
Vent Sections
Support Bracket Spacing
Every 5 ft (1.52 m)
See Figure 20 on page 12 for
vertical vent section support.
SV4.5HT-2
Termination
Support
Brackets
Building
Support
Framing
Ceiling
Fireplace
Exterior
Wall
Exterior
Wall
TYPICAL HORIZONTAL VENT INSTALLATION
Figure 31
Secure Vent SV4.5 direct vent system compo-
nents are unitized concentric pipe components
featuringpositive twistlock connection,(
referto
Figure 18 on page 12). All of the appliances
covered in this document are fitted with collars
having locking inclined channels. The dimpled
endoftheventcomponentsfitovertheappliance
collartocreatethepositivetwistlockconnection.
A. Plan the vent run -
Analyzetheventroutinganddeterminethetypes
and quantities of sections required
4-1/2" (114 mm), 10-1/2" (267 mm), 22-1/2"
(572mm),34-1/2"(876mm)and46-1/2"(1181
mm) net section lengths are available. Plan the
ventlengthssothatajointdoes notoccuratthe
intersectionofceilingorroofjoists.Makeallow-
ances for elbows as indicated in
Figure 18 .
Maintain a minimum 1" (25 mm) clearance to
combustiblesontheverticalsections.Clearances
for the horizontal runs are; 3" (76 mm) on top, 1"
(25mm)onsides,and 1" (25mm)atthebottom.
B. Frame exterior wall opening -
Locatethecenteroftheventoutletontheexteriorwall
accordingto the dimensionsshown in
Figure 9 on
page7. Cutand/orframeanopening,10-1/2"x12-1/8"
(267 mm x 308mm) inside dimensions, about this
center. F. Install firestop/spacer at ceiling -
When using Secure Vent, use SV4.5VF fir-
estop/spacer at ceiling joists; when using Se-
cureFlex,useSF4.5VFfirestop/spacer.Ifthere
is living space above the ceiling level, the
firestop/ spacer must be installed on the bot-
tom side of the ceiling. If attic space is above
the ceiling, the firestop/ spacer must be in-
stalled on the top side of the joist.
Route the vent sections through the framed
opening and secure the firestop/spacer with
8dnails orother appropriatefasteners ateach
corner.
Theunitizeddesign oftheSecure Vent compo-
nents 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
appliancecollar. Attach in thesamemanner as
you would a vent section.
Remembertomaintain1"(25mm)clearance
tocombustibles,framingmembers,andattic
or ceiling insulation when running vertical
chimney sections.
E. Attach vent components to each other -
Other vent sections may be added to the previ-
ously installed section in accordance with the
requirementsofthe vent tables. Toaddanother
ventcomponenttoalengthofventrun,alignthe
dimpled end of the component over the inclined
channel end of the previously installed section,
adjustingtheradialalignmentuntilthefourlock-
ingdimplesarealignedwiththeinletsofthefour
incline channels of the previous section. Push
theventcomponentagainsttheprevioussection
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
the channels.This seating position is indicated
by the alignment of the arrow and dimple as
shown in Figure 19 on page 12.
D.Attachventcomponentstoappliance-Toattach
aventcomponent to the appliance collar,align the
dimpled end over the collar, adjusting the radial
alignmentuntilthefourlockingdimplesarealigned
with the inlets of the four incline channels on the
collar(
refertoFigure18 onpage12).Pushthevent
component against the collar until it fully engages,
then twist the component clockwise, running the
dimples down and along the incline channels until
theyseatat the end of thechannels.
Bothofthesehorizontalventsystemsterminate
throughan outside wall.Building Codes limitor
prohibit terminating in specific areas. Refer to
Figure 8 on page 7 for location guidelines.
Figure 31, and Figures 34 to 41 on pages 18,
19and20
andtheirassociated HorizontalVent
Table illustrate the various horizontal venting
configurations that are possible for use with
these appliances. Secure Vent pipe applica-
tions are shown in these figures; Secure Flex
pipemayalsobeused.AHorizontalVentTable
summarizeseachsystem’sminimumandmaxi-
mumvertical and horizontallength values that
can be used to design and install the vent
components in a variety of applications.
HORIZONTAL (OUTSIDE WALL)
TERMINATION SYSTEM
C. Frame ceiling opening - If the vertical
route is to penetrate a ceiling, use plumb line
to locate the center above the appliance. Cut
and/or frame an opening, 10-1/2" x 10-1/2"
(267mmx267mm)insidedimensions,about
this center (refer to
Figure 17 on page 12 ).
I.Continueinstallationofhorizontal/inclined
sections- Continuewiththeinstallationofthe
straight vent sections in horizontal/inclined
run as described in Step E. Install support
straps every 5 ft. (1.52 m) along horizontal/
inclinedventrunsusingconventionalplumber’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 accept-
able all the way down to at or near level.
Itisimportanttomaintaintherequiredclear-
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
G. Support the vertical run sections -
See Section E on page 12.
H. Change vent direction - At transition from
or to a horizontal/inclined run, install the
SV4.5E45 and SV4.5E90 elbows in the same
manner as the straight vent sections. The
elbowsfeature a twistsection toallow them to
be routed about the center axis of their initial
collar section to align with the required direc-
tion of the next vent run element. Twist elbow
sectionsinaclockwisedirectiononlysoasto
avoid the possiblity of unlocking any of the
previously connected vent sections. See
Fig-
ure 21 on page 13
.

17
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
SV4.5 HT-2
Termination
10-1/2"
(267mm)
7"
(178)
5-1/8"
(130 mm)
12-1/8,"
(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
See Figure 9 on page 8
for Min. Distance to Base
of Appliance.
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.
Figure 32
Figure 33
Horizontal terminations have been designed to perform in a wide range of weather
conditions. Our terminations meet or exceed industry standards.
When selecting the locations of your horizontal terminations, do not place the
termination where water from eaves and adjoining rooflines may create a heavy flow
of cascading 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.
Takecaretocarefullyfollowtheinstallationinstructionsforthetermination,including
the use of silicone caulking where required.
Siding
Stucco
1-1/4" Maximum Recess of
Square Termination into
Exterior Finishing Material
Exterior Surface of
Framing
6 in. to 9-1/4 in.
(152 to 235 mm)**
Exterior Surface of Siding
Interior Surface of
Finished Wall
Maximum wall thickness
10 in.(254 mm)**
SV4.5HT-2
Square Termination
Maximum Extent of
Vent Run Sections
Relative to Exterior
Surface of Framing
Last Vent Section. Use
Telescopic Vent
Section (SV4.5LA), If
Necessary
Adapter
SV4.5RCH
SV4.5HT-2
Square Termination
Venting Connection and Exterior Wall Recessing of the
Horizontal Square Termination (SV4.5HT-2).
*Use silicone caulking to
seal the top and sides of
the termination, up to the
underlayment, stucco, or
masonry wall surface.
**For thicknesses greater
than 10”, see Table 4.
*Caulk
*Caulk
M. Install the desired termination -
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
32
,referto Table4 onpage 18 .Thistable lists
the additional venting components needed (in
addition to the termination and adapter) for a
particular range of wall thicknesses.
1.Installthesquaretermination(SV4.5HT-2)
-For the last step , from outside the exterior
wall,slidethecollarsoftheterminationontothe
adapter (the outer over the outer and the inner
inside the inner) until the termination seats
againsttheexterior wallsurfacetowhichitwill
beattached. Orientthehousingofthetermina-
tion with the arrow pointed upwards. Secure
the termination to the exterior wall. The hori-
zontal termination must not be recessed into
theexteriorwall or sidingbymorethanthe 1-
1/4" (32 mm) as shown in
Figure 33 .
SVHRK Snorkel Cap –The snorkel cap is de-
signedtobefittedintoabasementwindowbox.
The SVHRK cap is for use with flex vent pipe.
The vertical distance between the inlet and
outlet of the cap is 28 in. (711 mm).
L. Install Firestop/Spacer at exterior wall -
When using the square termination, install
SV4.5HF(SecureVent),SF4.5HF(SecureFlex)
Firestop/Spacer over the opening at the exte-
riorsideof the framing, longsideup, with the
3inchspacer clearanceatthetopas shownin
Figure 32 , and nail into place.
K. Attach termination adapter - Attach the
adapter (adapter - SV4.5RCH - provided with
the termination) to the vent section or tele-
scoping vent section), elbow or appliance col-
larasshown in
Figure 32 inthesame manner
asanySV4.5ventcomponent(refertoStepE).
(TheFirestop/Spacermayalsobeinstalledover
theopeningattheinterior sideofthe framing.)
J. Assemble vent run to exterior wall - If not
previously measured, locate the center of the
ventattheexteriorwall.Prepareanopeningas
describedinStepB. Assembletheventsystem
to point where the terminus of the last section
is located relative to the exterior surface to
which the termination is to be attached as
shown in
Figure 33 and Table 4 on page 18 .
IMPORTANT: The vent termination is hot
while in operation and for a period of time
following use of the fireplace. To prevent
contact with hot surfaces, we recommend
theuseofaTerminationGuard. Thiscanbe
purchased at your local dealer.

18 NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Note: See Figure 33 for wall thickness range reductions when using SV4.5HT-2.
H
H = 28 in. (711 mm) Maximum.
7 in. (178 mm)
*When using Secure Flex,
use Firestop/Spacer
SF4.5HF
*Wall Firestop/Spacer
(SV4.5HF)
H
V
*Wall Firestop/Spacer
(SV4.5HF)
*When using Secure Flex,
use Firestop/Spacer
SF4.5VF
*Ceiling
Firestop/Spacer
(SV4.5VF)
*When using Secure Flex,
use Firestop/Spacer
SF4.5HF
Figure 35 - Top Vent -
ONE 90 DEGREE ELBOW - ELBOW CONNECTION AT APPLIANCE
Figure 36 - Top Vent - ONE 90 DEGREE ELBOW -
ELBOW CONNECTION NOT DIRECTLY AT APPLIANCE
Figure 34 - Rear Vent - NO ELBOWS -
Square Horizontal Termination (SV4.5HT-2)
See
Table 4 as an aid in venting component selection for a
particular range of exterior wall thicknesses.
H
*Wall
Firestop/Spacer
(SV4.5HF)
V
*When using Secure Flex,
use Firestop/Spacer
SF4.5HF
HORIZONTAL VENT FIGURES/TABLES
Note:SV4.5VF(SecureVent),SF4.5VF(Secure
Flex)firestop/spacermustbeusedanytimevent
pipe passes through a combustible floor or
ceiling. SV4.5HF (Secure Vent), SF4.5HF (Se-
cureFlex)firestop/spacermustbeusedanytime
vent pipe passes through a combustible wall.
Square termination
(SV4.5HT-2) shown.
Square termination
(SV4.5HT-2) shown.
See Table 4 as an aid in venting component selection for
a particular range of exterior wall thicknesses.
Note: Itis very importantthat thehorizontal/
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.
Note: Secure Vent components (rigid vent
pipe and terminal) are shown in the figures;
SecureFlexcomponents(flexibleventpipeand
terminal) may also be used.
Note:Two45degreeelbowsmaybeusedinplace
ofone90degreeelbow. Thesamerisetorunratios,
asshownintheventingfiguresfor90elbows,must
be followed if 45 degree elbows are used.
WARNING: UNDER NO CIRCUMSTANCES MAY SEPA-
RATESECTIONSOFCONCENTRICFLEXIBLEVENTPIPE
BE JOINED TOGETHER.
4ELBAT llaWroiretxEsuoiraVrofderiuqeRstnenopmoCgnitneV )2-TH5.4VS(noitanimreTerauqSehTgnisUnehW,sessenkcihT
deriuqeRstnenopmoCgnitneV ssenkcihTllaWroiretxE )mm(sehcni
ylnOtiKnoitanimreT 4/1-9ot6 )532ot251(
tnev.ni6dnatiKnoitanimreT )6L5.4VS(noitces 4/3-0141ot )653ot372(
tnev.ni21dnatiKnoitanimreT )21L5.4VS(noitces 02ot4/3-61 )805ot624(
cipocseleTdnatiKnoitanimreT tnev.ni6dna)AL5.4VS(noitces )6L5.4VS(noitces
02ot4/3-11 )805ot992(
H Maximum V Minimum
feet feet
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 + H = 40 feet (12.2 m) Max.
H = 20 ft. (6.096 m) Max.
TABLE G
(meters) (meters)
TABLE F
H Maximum V Minimum
feet feet
3(0.914) Elbow Only
(meters) (meters)
Note: An elbow is acceptable as 1 foot of
vertical rise, except where an elbow is the
onlyvertical component inthe system. (See
Figure 35 ).
Example: If 20 feet of (H)
horizontalventrunisneeded,
then 4 feet minimum of (V)
verticalventwillberequired.
Thistableshowsa1(V)to5
(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.

19
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
V
H
H1
*Wall Firestop/Spacer
(SV4.5HF)
*Wall Firestop/Spacer
(SV4.5HF)
*When using Secure Flex,
use Firestop/Spacer
SF4.5HF
**Ceiling
Firestop/Spacer
(SV4.5VF)
**Note - When using
Secure Flex, use
Firestop/Spacer SF4.5VF
Example: If 20 feet of (H) horizontal vent run is needed,
then 4 feet minimum of (V) vertical vent will be required.
Thistableshowsa 1 (V) to 5 (H)ratio. Forevery 1 foot of
(V)vertical,youareallowed5feetof(H)horizontalrun,up
to a maximum horizontal run of 20 feet.
See Table 4 on page 18 as an aid in venting component
selectionforaparticularrangeofexteriorwallthicknesses.
TABLE H
H
+H
1Maximum HMaximum V Minimum
feet feet feet
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 + H + H1= 40 feet (12.2 m) Max.
H = 8 feet (2.438 meters) Max.
H + H1= 20 feet (6.096 meters) Max.
(meters) (meters) (meters)
H1
V
H
*Wall
Firestop/Spacer
(SV4.5HF)
**Ceiling
Firestop/Spacer
(SV4.5VF)
*When using
Secure Flex, use
Firestop/Spacer
SF4.5HF
**When using
Secure Flex, use
Firestop/Spacer
SF4.5VF
Example: If 20 feet of (H) horizontal vent run is needed, then 4 feet minimum of (V) vertical vent will be required.
Thistableshowsa1(V)to5(H)ratio. Forevery1footof(V)vertical,youareallowed5feetof(H)horizontalrun,uptoamaximumhorizontal
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.
Figure 37 - Rear Vent - TWO 90 DEGREE ELBOWS (Square termination SV4.5HT-2 shown.)
Figure 38 - Top Vent - TWO 90 DEGREE ELBOWS (Square termination SV4.5HT-2 shown.)
H+ H
1
Maximum V Minimum
feet feet
3(0.914) 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 + H+ H
1= 40 feet (12.2 m) Max.
H+ H
1= 20 ft. (6.096 m) Max.
TABLE J
(meters) (meters)
HORIZONTAL VENT FIGURES/TABLES (continued)
See Table 4 on page 18 as an aid in venting component selection for a particular range of exterior wall thicknesses.

20 NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
V
H
H1
V1
**Wall Firestop/Spacer
(SV4.5HF)
*Ceiling
Firestop/Spacer
(SV4.5VF)
*When using Secure Flex,
use Firestop/Spacer
SF4.5VF
**When using Secure
Flex, use Firestop/Spacer
SF4.5HF
**Wall Firestop/Spacer
(SV4.5HF)
V
H2
H1
H
**Wall Firestop/Spacer
(SV4.5HF)
*Ceiling
Firestop/Spacer
(SV4.5VF)
*When using Secure Flex,
use Firestop/Spacer
SF4.5VF
**When using Secure
Flex, use Firestop/Spacer
SF4.5HF
HMaximum V Minimum
feet feet feet
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 + H + H1+ H2= 40 feet (12.2 m) Max.
H = 8 feet (2.438 meters) Max.
H + H1+ H2= 20 feet (6.096 meters) Max.
H+ H1+ H2Maximum
TABLE K
(meters)
(meters) (meters)
Example: If 20 feet of (H) horizontal vent
run is needed, then 4 feet minimum of (V)
vertical vent will be required.
Thistableshows a 1 (V)to5 (H) ratio. For
every1footof(V)vertical,youareallowed
5 feet of (H) horizontal run, up to a maxi-
mum horizontal run of 20 feet.
Anelbow is acceptableas1 foot ofvertical
rise except where an elbow is the only
vertical component in the system. See
Figure 35.
V Minimum
feet feet
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)
(meters)
TABLE L
(meters)
HMaximum
11
H+ H
1= 20 feet (6.096 m) Max.
V+ V + H+ H = 40 ft. (12.192 m) Max.
Figure 40 - Top Vent - THREE 90 DEGREE ELBOWS
Figure 39 - Rear Vent - THREE 90 DEGREE ELBOWS (Square termination SV4.5HT-2 shown.)
See Table 4 on page 18 as an aid in venting component selection for a particular range of exterior wall thicknesses.
See
Table 4 on page 18 as an aid in venting component selection for a particular range
of exterior wall thicknesses.
Example: If20feetof(H)horizontalventrunis
needed,then4feetminimumof(V)verticalvent
will be required.
Thistableshowsa1(V)to5(H)ratio. Forevery
1footof(V)vertical,youareallowed5feetof(H)
horizontalrun,upto a maximum horizontal run
of 20 feet.
(Square termination
SV4.5HT-2 shown.)
HORIZONTAL VENT FIGURES/TABLES (continued)