Lennox Hearth Products Elite LBC-3824 User manual

38" & 43" Wood-Burning Fireplaces
P/N 850003M Rev. H 10/2011
LBR-3824 LBC-3824
LBR-3824-H LBC-3824-H
LBR-4324 LBC-4324
LBR-4324-H LBC-4324-H
MODELS
WH Report No. 629-915173A
ELITE SERIES
This installation manual will enable you to obtain a safe, efficient and
dependable installation of your fireplace system. Please read and
understand these instructions before beginning your installation.
Do not alter or modify the fireplace or its components under any
circumstances. Any modification or alteration of the fireplace system,
including but not limited to the fireplace, chimney components and
accessories, may void the warranty, listings and approvals of this system
and could result in an unsafe and potentially dangerous installation.
IMPORTANT! TO ASSURE PROPER ALIGNMENT OF GLASS DOORS:
INSTALL THIS FIREPLACE IN A SQUARE AND PLUMB CONDITION,
USING SHIMS AS NECESSARY AT SIDES AND/OR BOTTOM.
INSTALLATION
INSTRUCTIONS
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
2
TABLE OF CONTENTS
Safety Rules .................................... page 2
Tools and Building Supplies ............ page 2
Precautions ..................................... page 3
Introduction..................................... page 3
Clearances/Height Requirements..... page 3
Chimney System ............................. page 3
Assembly Outline............................. page 4
Location of Fireplace ....................... page 4
Assembly Steps............................... page 5
Preinstallation Notes........................ page 5
Clearances ....................................... page 5
Installing the Fireplace..................... page 5
Fireplace Specifications .................. page 6
Framing Specifications.................... page 7
Installing the Chimney System ........ page 8
30°Offset through Floor/Ceiling ...... page 9
Ten Foot Rule Summary .................. page 11
Multiple Terminations...................... page 11
Chimney Component Calculations ... page 11
Special Offset Instructions............... page 12
Offset Calculations........................... page 12
Vertical Elevation Chart................... page 13
Offset Elevation Chart ..................... page 14
Installing Offsets.............................. page 14
Combustion Air Kits ........................ page 15
Optional Equipment Considerations. page 15
Gas Line Connection........................ page 15
Vent Free Appliances ....................... page 16
Glass Doors..................................... page 16
Cold Climate Insulation.................... page 16
Fireplace Finishes ............................ page 16
Mantels and Trim............................. page 16
Hearth Extensions/Wall Shields ....... page 16
Finish Requirements........................ page 18
Installation Components.................. page 19
IMPORTANT: PLEASE READ AND
UNDERSTAND THESE RULES TO
FOLLOW FOR SAFETY.
1. Before starting your fireplace installation,
read these installation instructions carefully to
besureyouunderstandthemcompletelyandin
entirety. Failure to follow them could cause a
fireplacemalfunctionresultinginseriousinjury
and/or property damage.
The manufacturer is not responsible for any
smoking or related problems that may result
fromthe lackofadequate combustionair.It is
the responsibility of the builder/contractor to
ensurethatadequatecombustionairhasbeen
provided for the fireplace.
13.DO NOTusea fireplaceinsertorany other
productsnotspecifiedhereinbythemanufac-
turerforusewiththisfireplace.Allgaslogsets
must be operated with the damper clamped
open, including unlisted “vent free” log sets.
Listed “vent-free” log sets may be operated
with the damper closed.
14. "Smoke free” operation is not warranteed
norareweresponsible for inadequate system
draft caused by mechanical systems, general
construction conditions, inadequate chimney
heights, adverse wind conditions and/or un-
usualenvironmentalfactorsor conditions be-
yond our control.
15. Never, under any circumstances, install a
fireplace, chimney component or any acces-
sories, that has visible or suspected physical
damage as a result of handling or transporta-
tion.These itemsshouldbeinspectedbyyour
distributor or qualified factory representative
toensuresafecondition. When in doubt, con-
sult your distributor.
16. For additional safety considerations and
complete operating instructions, refer to the
Care and Operation Manual provided with the
fireplace.
TOOLS AND BUILDING SUPPLIES
NORMALLY REQUIRED
Tools should Include:
Phillips screwdriver
Hammer
Saw and/or sabersaw
Level
Measuring tape
Plumb line
Electric drill and bits
Pliers
Square
Building supplies:
Framing materials
Wall finishing materials
Caulking materials (noncombustible)
Fireplace surround and hearth
extension materials (noncombustible)
2.Alwayscheckyourlocalbuildingcodes.The
installationmustcomplywithalllocal,regional,
state and national codes and regulations.
3. These fireplaces must be installed with
Security Chimneys FTF10 [10" (254mm) in-
side diameter] Chimney System only. These
systems are intended for use in any applica-
tionwhereatraditionalmasonrytypefireplace
would apply. The chimney system must al-
ways vent to the outside of the building.
4. To ensure a safe fireplace system and to
prevent the build-up of soot and creosote,
inspect and clean the fireplace and chimney
priortouseandperiodicallyduringtheheating
season.
5. Use solid fuel only. DO NOT use artificial
waxbasedlogs,chemicalchimneycleanersor
flame colorants in your fireplace.
6. DO NOT use charcoal or coal under any
circumstances.
7. NEVER use gasoline, gasoline-type lantern
fuel,kerosene,charcoallighterfluid,orsimilar
liquids to start or “freshen up” a fire in this
fireplace. Keep any flammable liquids at safe
distance from the fireplace.
8. NEVER leave children unattended when
there is a fire burning in the fireplace.
9.Alwayskeepfluedamperopenwhenheatis
present in the fireplace.
10. Before servicing, allow the fireplace to
cool. Always shut off any electricity or gas to
the fireplace while working on it. This will
preventanypossibleelectricalshockorburns.
11. This fireplace is not intended to heat an
entire home or be used as a primary heat
source. It is designed to ensure homeowner
comfortbyprovidingsupplementalheattothe
room.
12. Always ensure that an adequate supply of
replacement combustion air from the outside
ofthehouse isaccessibleto thefiretosupport
normalcombustion. Fireplacesconsumelarge
volumes of air during the normal combustion
process. Intheeventthehomeistightlysealed
with modern energy efficient features, the op-
tionalcombustionairkitmaynotprovideallthe
air required to support combustion.

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 3
Figure 1
TYPICAL INSTALLATION
*Construction Materials:
• framing materials • paneling
• particle board • flooring
• dry wall • etc.
• plywood
PRECAUTIONS
Note: These fireplace systems are not difficult
toinstall.However,intheinterestofsafety,itis
recommendedthattheinstallerbeaqualifiedor
certified “tradesman” familiar with commonly
accepted fireplace installation and safety tech-
niques as well as prevailing local codes.
The most important areas of concern dealing
with the installation of factory-built fireplaces
areclearancestocombustiblematerials,proper
assembly of component parts, height of the
chimneysystem,theproperuseofaccessories
supplied by the manufacturer and the tech-
niques employed in using finishing materials
applied to the wall surrounding the fireplace,
hearth extensions and wall shields. Each of
these topics will be covered in thorough detail
throughoutthismanual.Pleasegiveeachyour
special attention as you progress with your
installation.
INTRODUCTION
General Information
The LBR Series fireplace is a traditional wood
burning radiant heat system. The LBC Series
fireplace is a traditional wood burning heat
circulatingsystem. Thesefireplacescomewith
standardbargrates,optionaloutside combus-
tionairkitsandoptionaldecorativeglassdoors.
Note:Illustrationsshownreflect“typical”instal-
lations with nominal dimensions and are for
designandframingreferenceonly.Actualinstal-
lationsmayvaryduetoindividualdesignprefer-
ences.However,alwaysmaintainminimumclear-
ances to combustible materials and do not vio-
late any specific installation requirements.
Thesefireplaceshavebeentestedandlistedby
Warnock Hersey (Report No. 629-915173A)
toU.L.standard127 for US and ULCS610for
Canada. These units are intended for installa-
tion in residential homes and other buildings
of conventional construction including com-
mercial, not in mobile homes.
These fireplace systems are designed for in-
stallation in accordance with the National Fire
Protection Standard for chimneys, fireplaces
and solid fuel burning appliances; NFPA 211
and in accordance with codes such as the
BOCABasic/NationalCodes,theStandardMe-
chanicalCodeandtheUniformBuildingCodes.
CLEARANCES AND HEIGHT
REQUIREMENTS
Thefireplacemaybeplacedonornearnormal
construction materials*. The combustion air
kit,firestopspacerandroofflashing(notchase
flashings)maybeplaceddirectlyonoragainst
normalconstructionmaterials.*Thechimney
requires a minimum 2" air space to combus-
tiblesandthefireplaceouterwrapperrequires
a minimum 1/2" air space to combustibles. A
combustiblemantlemaybeinstalled12"above
the opening of the fireplace as per NFPA 211,
Section 7-2.3.3. In Canada, the minimum is
18" (441mm) above the fireplace opening.
Theminimuminstalledheightofthecompleted
fireplacesystemis14'0". Themaximumheight
is 80' 0".
The fireplace and chimney system must be
enclosed when installed in or passing through
alivingareawherecombustiblesorpeoplemay
come in contact with it. This is important to
preventpossiblepersonal injuryorfirehazard.
For questions, please call your distributor or
the manufacturer. Special restrictions apply to
thefrontand facing of thefireplaceandnearby
walls (See pages 16 and 17 ).
CHIMNEY SYSTEM
Thesefireplacesaredesignedandcodelisted
forusewith Security Chimneys FTF10chim-
neySystemonly.AlwaysuseSecurityChim-
neysFTF10chimneycomponentswiththese
fireplaces.Donotmodifyoralterthesecom-
ponents as this may cause a potential seri-
ous hazard and void the Warranty.
IMPORTANT: WHEN INSTALLING THESE
FIREPLACES IN CANADA, THE CHIMNEY
COLLARENCLOSUREKIT,MODELCCEK,
MUST BE INSTALLED.
When complete these fireplace systems con-
sists of four basic “sub-systems”:
1. The Fireplace
2. The Chimney and Termination
3. Optional Louver Kits and Glass Doors
4. Optional Combustion Air Kit
5. Optional Cold Climate Kit (Mandatory in
Canada).
Chimney and
Termination
38/43 LBR Series Shown
Chimney Air Kit
(Canada Only)
WARNING: FAILURE TO USE MANUFAC-
TUREPROVIDEDPARTS,VARIATIONSIN
TECHNIQUES AND CONSTRUCTION MA-
TERIALS OR PRACTICES OTHER THAN
THOSE DESCRIBED IN THIS MANUAL
MAY CREATE A FIRE HAZARD AND VOID
THE LIMITED WARRANTY.

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
4
Figure 2
Chase Enclosure
A chase is a vertical box-like structure con-
structed to surround the fireplace and chimney.
Refer to
Figure 2
for a typical chase configura-
tion. As with all chimney installations, avoid
overhead obstructions such as trees, power
lines, etc. A chase should be constructed and
insulated just like any outside wall. In a cold
climate, we recommend the base of the chase
should also be insulated between the solid
continuous floor beneath the fireplace and the
chase bottom. Chase insulation in a cold cli-
mate installation is not required for safety.
Chimney Height
The total height of your completed fireplace
system from the surface the fireplace rests on
to the chimney top must not exceed 80 ft
(24.4 m) and must also meet minimum height
requirements. Refer to the minimum system
height chart, below.
Note: Do not insulate the chase cavity with
blown or fill type insulation materials.
LOCATION OF FIREPLACE
Carefully select the proper location for heat
circulation, aesthetics, chimney obstructions
and clearance to side wall(s). With proper pre-
planning, a slight adjustment of a few inches
can save considerable time and expense later
during construction andassembly.
Hearth
Hearth
Optional
Outside Chase
Figure 4
Carefully consider the position of the fireplace
opening with respect to the location of adja-
cent or nearby stairwells, bath or kitchen ex-
haust fans and/or return air registers for forced
air furnaces/air conditioners that could cause
a smoking fireplace condition if the house is
tightly insulated.
Whenlocating the fireplace, consideration must
be given to combustibles and final finishing.
See
Figure 5
and confine the final location of
combustible finish materials to the “Safe Zone.”
Insulate Joists
Same As Ceiling
Draft Stops
Note: Non-
Combustible
Chase
Flashing
must be
Used to
Cover
Chase
Opening
Optional
Insulation
in Outside
Walls of
Chase
Solid
Continuous
Surface
Outside
Base
Insulation
(Thermal Barrier)
8'
(2.4m)
Level
F10FS-2
Firestop
FTF10-CT2
Termination
19"
(483mm)
19"
(483mm)
WARNING: IF INSULATION IS USED, THE
FIREPLACE MUST NOT BE PLACED DI-
RECTLY AGAINST IT. INSULATION OR
VAPORBARRIERS, IFUSED,MUST FIRST
BE COVERED WITH GYPSUM BOARD,
PLYWOOD, PARTICLE BOARD OR OTHER
MATERIAL TO ASSURE INSULATION AND
VAPOR BARRIERS REMAIN IN PLACE.
WARNING: DO NOT PACK OR FILL RE-
QUIRED AIR SPACES WITH INSULATION
OR OTHER MATERIAL. NO MATERIAL IS
ALLOWED IN THESE AREAS.
Note: Local codes may not require firestopping
at the ceiling levels for outside chase installa-
tions. However, it is recommended for safety
and the reduction of heat loss.
MINIMUM SYSTEM HEIGHT
Security FTF10 Pipe
Vertical Installation 14 ft (4.3 m)
One Offset
Two Offsets
16 ft (4.9 m)
24 ft (7.3 m)
Figure 3
ASSEMBLY OUTLINE
Before You Start
Check the inventory list to be sure you have all
necessary parts in good usable condition. Also
check for any concealed damage.
Check the operation of the damper. The dam-
per is controlled through the use of a damper
rod inside the top center of the firebox open-
ing, behind the lintel (Figure 3).
•To CLOSE the damper, PUSH the damper rod
UP and BACK (toward the rear of the fire-
place), until locked in position.
•To OPEN the damper, PULL the damper rod
FORWARD (toward the front of the fireplace)
and DOWN, until locked in position.
To CLOSE damper, PUSH damper rod UP
and BACK (toward rear of fireplace).
To OPEN damper, PULL damper rod DOWN
and FORWARD (toward front of fireplace).
Combustion Air Actuator
Lintel
Damper
CLOSED Damper
OPEN
~
Damper Rod

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 5
DO NOT permanently place furniture or other
items such as decorative pillows within 60" of
the fireplace front face.
ASSEMBLY STEPS
Note:Thefollowingstepsrepresentthenormal
sequence of installation. Each installation is
unique,however, and might requireadifferent
sequence.
1. Position firebox prior to framing or into
prepared framing.
2. Install the chimney system.
3. Install optional outside combustion air kit.
4. Plumb gas line if a decorative gas appliance
will be used. (Gas connections should only be
performed by an experienced, licensed/certi-
fied tradesman.)
5. Complete the installation, finish wall mate-
rial, surround and hearth extension to your
individual taste.
6. Assemble and attach optional glass door
assembly.
Study the three dimensional illustration ( Fig-
ure1 ) togetageneralidea ofeachelementof
your fireplace system.
PRE-INSTALLATION NOTES
The fireplace may be installed directly on a
combustiblefloororraisedonaplatformofan
appropriate height. Do not place fireplace on
carpeting,vinylorothersoftfloorcoverings.It
may, however, be placed on flat wood, ply-
wood, particle board or other hard surfaces.
Figure 5
Figure 7
Figure 6
INSTALLING THE FIREPLACE
Step1. Slidethefireplace intopreparedfram-
ingorpositionfireplaceinitsfinalpositionand
frame later.
Thefireplace maynotbe recessedintoacom-
bustible floor. Maintain the floor to hearth
clearance established by the fireplace lower
front face.
Be sure fireplace rests on a solid continuous
floor or platform with appropriate framing for
support and so that no cold air can enter the
room from under the fireplace.
The fireplace may be positioned and then the
framingbuiltaroundit,ortheframingmay be
constructed and the fireplace positioned into
the opening.
Usually,nospecialfloorsupportisneededfor
the fireplace, however, to be certain:
1. Estimate the total weight of the fireplace
system including chimney and surround ma-
terials such as brick, stone, etc., to be in-
stalled. Shippingweightsforthefireplacemay
be found on page 18.
2. Measure the square footage of the floor
spacetobeoccupiedbythesystem,surrounds
and hearth extensions.
3.Notethefloorconstruction,i.e.2x6’s,2x8’s
or 2 x 10’s, single or double joists, type and
thickness of floor boards.
4. Use this information and consult your local
building code to determine if you need addi-
tional support.
CAUTION: DO NOT BLOCK THE HEAT-CIRCU-
LATING AIR INLET AND OUTLET PORTS ON
CIRCULATINGMODELS. DOINGSO MAY RE-
SULT IN A POTENTIAL FIRE HAZARD.
If you plan to raise the fireplace and hearth
extension, build the platform assembly then
positionfireplaceandhearthextensionontop.
Secure the platform to the floor to prevent
possible shifting.
CLEARANCES
Minimum clearance to combustibles for the
fireplace is as follows; sides and back – 1/2"
(13mm), combustible floor – 0" (0mm), adja-
centwall18"(457mm),adjacentshieldedwall
( K factor of .84 or less 40" W x 40" H ) 12"
(305mm), ceiling – 37-1/2" (953mm). Refer
to page 17 for more detail .
Note: Clearance at the nailing flange for both
fireplace models is 0" (0mm).
Note: Adjacent wall considerations are for an
adjacent wall on only a single side. Walls
should not be placed at minimum distance at
both sides of the fireplace.
Step 2. Inserttheprovidedmetal safety strips,
beneath the fireplace as illustrated ( Figures 6,
7 and 8 ).Thesafetystrips should overlap 1/2"
min. for continual coverage of the floor.
Note: Safety strips are not required when fire-
place rests on a noncombustible surface.
Note:Installthehearthextensiononlyasillus-
trated (see Figures 43 and 44).
Metal Safety Strip Floor
Hearth
Extension
1/2" (13mm)
Maintain
1/2" (13mm)
Air Space
at Sides
and Back
Combustible
Wall
Metal Safety Strip Floor
1/2" (13mm)
Maintain
1/2" (13mm)
Air Space
at Sides
and Back
Combustible
Wall
Platform
Hearth
Extension
Wall
Covering
Black Portion Of Frame
Not To Be Covered With
Combustible Materials
Safe
Zone
45°
18”
Door
Opening
1”
18”

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
6
FIREPLACE SPECIFICATIONS
Figure 10
The safety strips should extend from front of
thefireplaceatleast1-1/2"andshouldextendto
be at least flush with the sides. In the event a
woodensupportisusedtoelevatethefireplace
abovethefloor,a“Z”typesafetystripshouldbe
fabricatedandusedtoprotectthefrontsurface
ofthewoodsupportaswellasthefloorbeneath
the hearth extension (
Figures 8 and 9 ). The
safetystripsshould betackeddownto prevent
possible movement.
Note: The “Z” type safety strip is not supplied.
Step 3. Referto fireplace drawings and specifi-
cationsonpages6and7forframingdimensions
and details. Frame appliance enclosure as illus-
trated in
Figures 11 through 14 on page 7.
IMPORTANT: UNDER NO CIRCUMSTANCES
CAN THE FIREPLACE TOP SPACERS (
FIGURE
10
) BE REMOVED OR MODIFIED, NOR MAY
YOUNOTCHTHEHEADERTOFITAROUNDOR
BE INSTALLED LOWER THAN THE SPACERS.
THE HEADER MAY BE IN DIRECT CONTACT
WITH THE TOP SPACERS BUT MAY NOT BE
SUPPORTED BY THEM.
Metal Safety Strips
with 1/2" (13mm) Min.
Overlap
1-1/2"
(38mm)
Figure 9
Figure 8
Special “Z” Metal Safety
Strips with 1/2" (13mm) Min.
Overlap
2"
(51mm)
Blocking
Top View
Front (LBC Shown)
15"
(381mm)
11-1/2"
(292mm)
38 = 38" (965mm)
43 = 42-3/4" (1085mm)
24-5/8"
(625mm)
8"
(203mm)
38 = 48" (1219mm)
43 = 52-3/4" (1340mm)
5"
(127mm)
10"
(254mm)
38 = 26-5/16" (668mm)
43 = 31-1/16" (788mm)
15" (391mm)
9-3/4"
(248mm)
38 = 48" (1219mm)
43 = 52-3/4" (1340mm) 5/8" (16mm)
25-5/8"
(651mm)
44-1/8"
(1121mm)
6-1/2"
(165mm)
1-3/4"
(44mm)
Right Side
15-1/4"
(387mm) 9-3/4"
(248mm)
5/8"
(16mm)
9-1/4"
(235mm)
25-5/8"
(651mm)
12-1/2"
(318mm)
49-3/4"
(1263mm) Gas Line
Access
11"
(279mm)
15"
(381mm)
12-1/2"
(318mm)
9-1/4"
(235mm)
25-5/8"
(651mm)
49-3/4"
(1263mm)
Combustion
Air Inlet
Left Side

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 7
Note: The framed depth, 25-1/2" (648 mm)
fromaframedwall,mustalwaysbemeasured
fromafinishedsurface.Ifawallcoveringsuch
as drywall is to be attached to the rear wall,
thentheframeddepthmustbemeasuredfrom
the drywall surface. It is important that this
dimension be exact.
If the appliance is to be elevated above floor
level, a solid continuous platform must be
constructed.
The header may rest on the top metal spacers,
but must not be notched to fit around them.
Consult all local codes.
Figure 11
Figure 12
Framing Dimensions for Ceiling
Flue Type A B
FTF10 Vertical 19" 19"
(483 mm) (483 mm)
FTF10 19" 29"
Offset 30°(483 mm) (737 mm)
Figure 13
Framing Dimensions for Roof
Pitch C D*
0/12 19" 19"
(483 mm) (483 mm)
6/12 19" 22"
(483 mm) (559 mm)
12/12 19" 27"
(483 mm) (686 mm)
* Perpendicular to roof ridge
Figure 15
Figure 16
Figure 14
Note: Allframingdimensionscalculatedfor1/2"
dry wall at the fireplace face. If sheathing the
chaseorfinishingwithotherthicknessmaterials,
calculations will need to be made.
FRAMING SPECIFICATIONS
FOAK-4 Combustion
Air Kit
G
A
J
Outside Chase
Back Wall of Chase/Enclosure
Including Finishing Materials
if any
Rough Framing Face
(Unfinished Shown)
A
E
F
D
C
K
Back Wall of Chase/Enclosure
Including Finishing Materials
if any
Rough
Framing Face
(Unfinished Shown)
Corner Installation
FOAK-4 Combustion
Air Kit
A
B
Ceiling Framing
C
D
Roof Framing
Header
Fireplace Framing
B
A
Framing Dimensions
Fireplace Opening Width
38 43
A48-1/8" 52-7/8"
(1222 mm) (1343 mm)
B50" 50"
(1270 mm) (1270 mm)
C26-1/4" 31"
(667 mm) (787 mm)
D13-1/8" 15-1/2"
(334 mm) (394 mm)
E77-1/4" 82"
(1962 mm) (2083 mm)
F38-5/8" 41"
(981 mm) (1041 mm)
G25-1/2" 25-1/2"
(648 mm) (648 mm)
J11" 11"
(279 mm) (279 mm)
K54-5/8" 58"
(1388 mm) (1473 mm)
A
G
Inside Chase
Back Wall of Chase/Enclosure
Including Finising Materials if any
Rough
Framing Face
(Unfinished
Shown)
FOAK
Combustion
Air Kit

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
8
Figure 17
Step 5. The fireplace should be secured to the
sideframingmembersthroughthenailingflange
( Figure 18 ).
Figure 18
Note: The nailing flange and the area directly
behind the nailing flange is exempt from the
clearancesdescribedonthefireplaceclearance
label.
For Canadian Installations, Proceed
with Steps 6 through 9
Step 6. Attach the cold climate kit, Model
FTF10-CCK1-LD, around the chimney collar
with the screws provided ( Figure 19 ).
Step4.Thefireplaceshouldbeanchoredtothe
floor. Bend down the four (4) anchor tabs
located at the base of the fireplace and secure
to the floor with 8d nails ( Figure 17 ).
Figure 20
Note:Theoptionalcollarductkit,ModelFTF10-
CDK,shouldbeinstalledafterthechimneyhas
been attached to the flue collar.
Step 2. Using standard construction framing
techniques, construct openings for the chim-
ney through the ceiling(s) and roof or through
anoutsidechase.Allframingmustmaintainthe
minimum air space clearance at all times.
CAUTION: ALLOW A MINIMUM 2" (51 MM)
CHIMNEYAIRSPACETOCOMBUSTIBLEFRAM-
INGMEMBERSTHROUGHOUTVERTICALAND/
OR OFFSET CHIMNEY INSTALLATIONS.
A minimum 2" (51 mm) air space must be
reserved for all combustible and noncombus-
tible materials extending for any continuous
length surrounding the chimney.
Reference
Figures15and16 andcharts“Fram-
ing Dimensions for Ceiling and Roof,” which
specifyminimumceilingandroof dimensions.
Fornewconstruction,todeterminechimneycen-
terline,useplumblinefromceilingorroofabove
fireplace to the center of fireplace flue collar.
For remodeling, plumb to the center of the
fireplace flue collar from the ceiling or roof
above. Drive a nail through the ceiling or roof
frombelowtomarkposition.Markandcutahole
intheceiling(aroundthenail)( Figure20 ).Then
plumbfromceilingorroofdirectlyabovethecut
hole to determine roof hole position.
Step 7. Connect the 4" (102 mm) Class 0 air
duct provided, to the collar on the chimney
collarenclosurewiththescrewsprovidedinthe
kit’s hardware package.
Step 8. Route the Class 0 air duct out the back
or side wall, up through the ceiling or floor
joists to an outside wall. The duct inlet should
be located above snow level or above any
anticipated snow level.
Figure 19
Note: If the fireplace is installed against an
inside wall, the Class 0 air duct may be ex-
tended into a ventilated attic space at least 18"
(457 mm)abovetheatticfloor.Securetheduct
hoodtoaverticalpostwiththeinletpositioned
downward.Ensurethatnothingblocksthehood
opening.Thisductmustneverterminatehigher
than the fireplace chimney.
Step9.Cutorframeaholethroughtheoutside
wallfortheinstallationoftheductinlethood.A
4-1/2" (114 mm) diameter hole is required.
Feed the loose end of the flexible duct through
theholecutfortheinlet hood and attach to the
collar on the inlet hood using (2) two screws.
Insert the hood into the opening. Secure in
place with nails driven through the holes in
hood flange. Seal with noncombustible water-
proofsilicon typecaulking.If additionalductis
needed, use Class 0 metallic air duct.
INSTALLING THE CHIMNEY SYSTEM
Step 1. Check the flue damper for proper op-
eration. When the flue damper is in the fully
closed position, the damper control lever is
pushed all the way to the rear of the firebox.
When the damper is in the fully open position,
the flue damper control lever is pulled all the
way to the front of the firebox.
8d Nail
Framing
Stud
Nailing
Flange
Enclosure Box
Anchor
Tab

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 9
CHIMNEY30°OFFSETTHROUGH FLOOR
OR CEILING
Itmaybenecessarytoassemblethechimneyat
30°when passing through the floor or ceiling
area. Use the F10FS30-2 firestop spacer as
shown in Figures 23 and 24 . Support the
chimney at floor or ceiling penetration with a
FTF10 stabilizer if distance of chimney below
ceilingis10'ormore.Maintain2"minimumair
spacetocombustiblesfromchimneysections.
F10FS30-2
Firestop Spacer
FTF10-S4
Stabilizer
2" Min.
Air Space
30°Firestop
And Attic Above
10'
Max.
Attic Space
2" Min.
Air Space
F10FS30-2
Firestop Spacer
FTF10-S4
Stabilizer
30°Firestop
And Room Above
10'
Max.
Room Above
2" Min.
Air Space
2" Min.
Air Space
Figure 21
Figure 22
Firestop Spacer
Room Above
Firestop Spacer
Attic Above
Figure 23
Figure 24
For Canada Only
When installing the chimney system through
an open attic space, the attic shield assembly-
firestopspacermustbeused( Figure25 ).This
installation is required only for use in Canada.
Locking
Tabs
(Lances)
Note: For Canadian installations, all chimney
installedoutsidethebuildingmustbeconstructed
with galvalume (outer sections only) effective
January 1, 1992. The appropriate model desig-
nations are located in the back of this manual.
TheFTF10chimneysystemisatwopiecechim-
ney that snap locks together from the fireplace
up. Alwaysstartwiththeinnerfluesection.With
the lanced end up, snap lock the joint into the
matching collar on top of the fireplace. At all
subsequentjoints,theupperfluesectionfitsinto
thelowerorprecedingfluesection.Eachsection
snapstogetherbymeansoflockingtabs(9tabs
per joint). Check each section by pulling up
slightly from the top to ensure proper engage-
ment before installing succeeding sections. If
the flue has been installed correctly, it will not
separate when tested. Also, the inner flue joint
whereeachsectionisjoinedshouldbetightand
flat without gaps ( Figure 26 ).
Figure 26
Theouterchimneysectioninstallstheopposite
way; the lanced end goes down and each new
section installs OVER the outside of the previ-
ous section ( Figure 27 ).
Figure 27
Figure 25
Step 4. Note: All chimney sections are con-
structed with a unique locking tabs and hem
design, which ensures and immediate, tight
assemblybetweensections.Planyourchimney
requirementscarefullybeforeassembly,asthe
chimneyisdifficult to disassemble after instal-
lation.Ifdisassembled, the tabsmightbecome
damaged. Be certain that the tabs are properly
formed to ensure they engage properly.
Step 3. Position the appropriate firestop
spacer at the ceiling and nail temporarily with
two (2) 8d nails. Use a flat firestop spacer,
Model F10FS-2, for the FTF10 system if chim-
ney penetrates vertically. If the chimney pen-
etratesthroughtheceilingata30°angle(offset
chimney)thenusea30°firestopspacer,Model
F10FS30-2. Use one nail on opposite sides of
the firestop to hold in position. Nail perma-
nently, using at least two (2) more 8d nails,
afterthechimneysectionshavebeenassembled
throughthefirestopspacerandafternecessary
adjustments have been made. The firestop
spacermustbesecuredinplacebyatleastfour
(4) 8d nails when completely installed.
Note: Ifthere is aroomabove the ceiling level,
the firestop spacer must be installed on the
bottomsideoftheceiling.Ifanatticisabovethe
ceiling level, the firestop spacer must be in-
stalled on the top side of the ceiling joists
(Figures 21 and 22 ).
Open Attic Space

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
10
Locking Band
Waterproof
Caulk
Figure 32
Step 9. Security Chimneys locking bands,
Model FLB, may be required if the chimney
extendstoohighabovetheroofflashing. Asa
generalrule,ifthechimneyextendsmorethan
6' above the roof flashing, the use of locking
bands is advisable to strengthen the chimney
assembly. Alignthelockingbandatthechim-
ney joint. Locking bands wrap around pipe
joints equally covering the joints of both pipe
sections. Use the nut provided and TIGHTEN
snugly.Donotovertighten asthismightdam-
age the chimney section (
refer to Figure 29 ).
Note: If chimney extends more than 8' above
roofsurface,guywiresarealsorecommended.
Usethree(3)guywires,attachtolockingband
assembly, extend and secure to roof in a
triangular pattern (Figure 33 ). Guy wires are
not supplied by the manufacturer.
Roof Ridge
120°
Step8.ThestandardSecurityFTF10roofflash-
ingassembliesincludeastormcollar.Slidethe
stormcollaroverouter chimney, rest onflash-
ingspacers andalignwith topsurfaceof flash-
ing. Insert tab in slot, pull tight and bend tab
backoverslot.Sealstormcollartoouterchim-
ney with roof caulking or mastic around entire
circumference of pipe. Also add extra roof
caulkingto the tab/slot area tosealcompletely
against water penetration (
Figure 32 ). Check
all joints very carefully to ensure no water
intrusion can take place.
Figure 33
1" Min. Air Space
To Combustibles
FTF8-S4 Stabilizer
Figure 28
Security's chimney sections do not need to be
screwed together. Additional reinforcement is
not necessary except in certain offset condi-
tions (refer to page 12, Figure 39 ).
Step 5. The height of vertical chimney pipe
supported only by the fireplace must not ex-
ceed 30'. Chimney heights above 30' must be
supported by a Model FTF10-S4 stabilizer in-
stalled at 30' intervals.
Note:TheModelFTF10-S4adds3"neteffective
height to the total chimney system.
Install the Model FTF10-S4 stabilizer by fitting
inner section down into respective section of
proceeding flue pipe and locking outer stabi-
lizer section into place over the outer chimney
pipe. Position for proper clearance through
framedopeningandnailstrapssecurely(under
tension in “shear”) into place on framing. Use
8dnails.Attachsuccessivelengthsofchimney
pipe directly to stabilizer using same tech-
niques as described in Step 4 ( Figure 29 ).
Figure 29 Figure 31
Next,slideroofflashingoverextendedchimney
sectionthatpreviouslyhasbeeninstalledabove
the roof opening in Step 4. FTF10 flashings
require flashing spacers. Slide flashing all the
way down until the flashing base rests flat on
the roof ( Figure 30 ). Again, check the vertical
positionofthechimneyandthe2"minimumair
space to combustibles.
Figure 30
Note:Donotcaulkorsealtheventilatingopenings.
Step 7. Secure flashing by nailing along the
perimeter into roof using 8d nails. If shingled
roof,slideupper endandsidesof roofflashing
undershingles(trimif necessary), seal thetop
and both sides of the flashing to the roof with
roofcaulking.Covernailheadswithroofcaulk-
ing (
Figure 31 ).
FTF10 Chimney
FTF10 Flashing
Flashing Spacers
Do Not Seal
Note: Do not apply excessive pressure to any
subsequent chimney sections following the
stabilizer when installing. Ensure each subse-
quent chimney section is securely attached by
testing as noted in Step 4.
Step 6. Select the proper Security Chimneys
roofflashing basedonpitch ofroof.Use chart
below for selection:
Roof Pitch Model
Flat to 6/12 F10F6
6/12 to 12/12 F10F12
Note:Assembleonecomponentofchimneyata
time(innersectionfirst;then outer section last)
beforeprecedingwiththenextcompletesection.
Continue to assemble the chimney up through
framedopening.Assemblejustenoughtopen-
etrate the roof flashing openings ( Figure 28 ).
Alwaysmaintain2"minimumairspacetocom-
bustiblematerialsandalwayscheckeachchim-
ney joint (inner and outer) to ensure proper
engagement.Checkverticalalignmentofchim-
ney so that it projects from the roof in true
vertical position.

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 11
Figure 34
3. Center the outer locking section over outer
flue pipe. Push down until all locking tabs are
firmly engaged and locked.
4. Pull up slightly on CTDTM to ensure the
locking joint is firmly engaged and locked.
Using a FTF10-CT1 Chase Termination:
Refer to specific installation instructions in-
cluded with FTF10-CT1 chase terminations for
clearance and installation details.
Using a FTF10-CT2 Chase Termination:
Refer to specific installation instructions in-
cluded with FTF10-CT2 chase terminations for
clearance and installation details.
Note: It is recommended that all exterior ex-
posed metal fireplace components; such as
terminations, flashings, storm collars and/or
flue be painted with a premium quality, high
temperature,rustpreventativepaintdesigned
for metal. This is especially important when
installations are made in abnormally adverse
orcorrosiveenvironments;suchasnearlakes,
oceans or in areas with consistently high hu-
midityconditions.Consult thepaintmanufac-
turersinstructionsforproperpreparationand
application.
TEN FOOT RULE SUMMARY
The minimum chimney height above the roof
and/ortoadjacentwallsandbuildingsisspeci-
fied by all major building codes.
If the horizontal distance from the peak of the
roof is less then 10', the top of the chimney
must be at least 2' above the peak of the roof.
If the horizontal distance from the chimney
edgetothepeakof the roof is more than10'a
chimney height reference point is established
on the roof surface 10' horizontally from the
chimneyedge.Thetopofthechimneymustbe
at least 2' above this reference point. In all
cases, the chimney cannot be less then 3'
above the roof at the edge of the chimney.
The2'in10'ruleisnecessaryintheinterestof
safetybutdoesnotensuresmoke-freeopera-
tion. Trees, buildings, adjoining roof lines,
adverse wind conditions, etc., may require a
taller chimney should the fireplace not draft
properly ( see Figure 35 ).
Figure 35
MULTIPLE TERMINATIONS
If more than one termination is located in the
samechaseorwithinthesamegeneralproxim-
ity, we suggest they should be separated in
distanceatleast24"horizontallyfromfluecen-
ter to flue center and stacked or staggered
vertically at least 18" apart, from the termina-
tion of one smoke exit to the termination of
another smoke exit ( Figure 36 ).
This suggestion is provided in the interest of
betteroperation.Iftheterminationsarelocated
too close to each other, smoke may migrate
from one flue into the other.
Figure 36
FTF10 CHIMNEY COMPONENT
CALCULATIONS
The minimum installed height of the com-
pleted fireplace system is 15' 0". The maxi-
mum height is 60' 0".
Todeterminethenumberofchimneysections
and chimney components required, follow
these steps:
1. Determine total vertical height of the fire-
place installation. This dimension is the dis-
tance from the surface the fireplace sets on
to the point where smoke exits from the
termination.
2. Determine the number of chimney compo-
nents required, except chimney sections. This
wouldincludefirestopspacers,stabilizers,roof
flashing, etc.
Step 10. Installing a FTF10 CTDTM Round
Termination:
1. Hold the FTF10 CTDTM over the top of the
last chimney section installed (
Figure 34 ).
2. Center the inner slip section into inner flue
pipe and slip down.
20"
(508mm)
CTDTM
Termination
18"
(457mm)
18"
(457mm)
24"
(610mm)
Less Than 10'
3'
Min
2' Min.
10' 3'
Min

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
12
Figure 38
A1
C1
B1
B2
C2
A2
A1
C1
B1
B2
C2
A2
Figure 39
Chimney
Section
Joints
No. 8 x 1/2" SMS
Screws Required At
Every Joint Past 6'
No Screws Required In
Joints For First 6' of Offset
4'
6'
A 1/8" diameter hole must be drilled in the
chimney joint using a 1/8" diameter drill. Hole
shouldbedrilledincenterofjointoverlap(
see
Figure 40 ). Be sure to drill only through the
outer chimney casting. Do not puncture the
inner flue.
Maximum offset of chimney system is 30°.
Two offsets must not be assembled to form a
60°offset. However, two sets of offset and
return elbows may be used on a single flue
system, provided the total height of the sys-
tem exceeds 25'.
Returnelbowsupportstrapsmustbesecurely
attachedundertension(inshear)tostructural
framing members above. Do not substitute a
FTF10-30offsetelbowinplaceofaFTF10-E30
return elbow.
OFFSET CALCULATIONS
Step1.UseOffsetChartto determineamount
of horizontal offset (A) and height (B) for
various chimney section assemblies.
Step2.Use“HeightofChimneyOnly”column
in The Vertical Elevation Chart to determine
combinations of chimney used above return
elbow to achieve desired heights. Reference
Components Effective Height Chart in vertical
elevation chart section on page 13.
Step 3. Use Elevation Chart as job estimator
only.Add necessary firestop spacers and sta-
bilizers as required. Firestop spacers must be
used as shown in Figures 23 and 24 and
stabilizers as shown in Figure 29 .
3.Theeffectiveheightsofthecomponentsare:
The Fireplace = 48-3/8"
FTF10-12 = 10-1/4"
FTF10-18 = 16-1/4"
FTF10-36 = 34-1/4"
FTF10-CTDTM Termination = 13"
FTF10-CT1 Termination = 12" to 18"
FTF10-CT2 Termination = 15" to 23"
FTF10-S4 Stabilizer * = 3"*
* Required for every 30' of vertical chimney
and/or 10' of offset chimney.
4. Determine amount of chimney height re-
quiredby subtracting total combined height of
all pre-selected components (fireplace and
chimneycomponentsfromtotaldesiredheight.)
Reference Vertical Elevation Chart and deter-
minethenumberofchimneysections(quantity
and length) required.
SPECIAL OFFSET INSTRUCTIONS
To clear any overhead obstructions, you may
offset your chimney system using Security's
30°offsetandreturnelbows.Usetwoelbows-
anoffsetelbowtoinitiatetheoffsetandareturn
elbow to terminate it. A 30°offset elbow, an-
gling in any direction, may be the first compo-
nentusedoffthetopofthefireplacefluecollar.
Theoffset and return elbows may be attached
together, or a section or sections of chimney
maybeusedbetween,butdonotexceed20'in
total length between elbows. If sections of
pipe exceed 10' between elbows, a chimney
stabilizermustbeusedatthemidpoint( Figure
37 ). The stabilizer support straps must be
attachedundertension(inshear)tostructural
framing members above. When two sets of
elbows are used, the maximum combined
length of chimney used between elbows can-
not exceed 20' ( Figure 38 ). Example: If C1=
10' then C2cannot exceed 10'.
Ifanoffsetexceeds6'inlength,eachchimney
joint beyond the first 6' of offset to the return
elbow,mustbesecuredbyaNo.8x1/2"sheet
metal screw located at the underside of the
joint ( Figure 39 ).
Figure 37
Stabilizer
A
1
20'
Max.
B
1
10' Max.
Offset
Elbow
Return
Elbow

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 13
FTF10 VERTICAL ELEVATION CHART
11 0 11 1 0 0 279 0.28
17 1 5 0 1 0 432 0.43
21 ¹⁄₄ 19¹⁄₄ 2 0 0 540 0.54
27 ¹⁄₄ 23¹⁄₄ 1 1 0 692 0.69
33 ¹⁄₄ 29¹⁄₄ 0 2 0 845 0.85
35 2 11 0 0 1 889 0.89
37 ¹⁄₄ 31¹⁄₄ 2 1 0 946 0.95
43 ¹⁄₄ 37¹⁄₄ 1 2 0 1099 1.10
51 ¹⁄₄ 43¹⁄₄ 0 1 1 1302 1.30
55 ¹⁄₄ 47¹⁄₄ 2 0 1 1403 1.40
61 ¹⁄₄ 51¹⁄₄ 1 1 1 1556 1.56
67 ¹⁄₄ 57¹⁄₄ 0 2 1 1708 1.71
69 ¹⁄₄ 59¹⁄₄ 0 0 2 1759 1.76
79 ¹⁄₄ 67¹⁄₄ 1 0 2 2013 2.01
85 ¹⁄₄ 71¹⁄₄ 0 1 2 2165 2.17
89 ¹⁄₂ 75¹⁄₂ 2 0 2 2273 2.27
95 ¹⁄₂ 711¹⁄₂ 1 1 2 2426 2.43
103 ¹⁄₄ 87¹⁄₄ 0 0 3 2622 2.62
113 ¹⁄₂ 95¹⁄₂ 1 0 3 2883 2.88
119 ¹⁄₂ 911¹⁄₂ 0 1 3 3035 3.03
123 ³⁄₄ 10 3 ³⁄₄ 2 0 3 3143 3.14
129 ³⁄₄ 10 9 ³⁄₄ 1 1 3 3296 3.30
137 ¹⁄₂ 11 5 ¹⁄₂ 0 0 4 3493 3.49
147 ³⁄₄ 12 3 ³⁄₄ 1 0 4 3753 3.75
153 ³⁄₄ 12 9 ³⁄₄ 0 1 4 3905 4.91
158 13 2 2 0 4 4013 4.01
164 13 8 1 1 4 4166 4.17
171 ³⁄₄ 14 3 ³⁄₄ 0 0 5 4362 4.36
182 15 2 1 0 5 4623 4.62
188 15 8 0 1 5 4775 4.78
192 16 0 2 0 5 4877 4.88
198 16 6 1 1 5 5029 5.03
206 17 2 0 0 6 5232 5.23
215 ³⁄₄ 17 11 ³⁄₄ 1 0 6 5480 5.48
222 18 6 0 1 6 5639 5.64
226 ¹⁄₄ 18 10 ¹⁄₄ 2 0 6 5747 5.75
232 ¹⁄₄ 19 4 ¹⁄₄ 1 1 6 5899 5.90
240 20 0 0 0 7 6096 6.10
250 ¹⁄₄ 20 10 ¹⁄₄ 1 0 7 6356 6.36
256 ¹⁄₄ 21 4 ¹⁄₄ 0 1 7 6509 6.51
260 ¹⁄₂ 21 8 ¹⁄₂ 2 0 7 6617 6.62
266 ¹⁄₂ 22 2 ¹⁄₂ 1 1 7 6769 6.77
274 ¹⁄₄ 22 10 ¹⁄₄ 0 0 8 6966 6.97
284 ¹⁄₂ 23 8 ¹⁄₂ 1 0 8 7226 7.23
290 ¹⁄₂ 24 2 ¹⁄₂ 0 1 8 7379 7.38
294 ³⁄₄ 24 6 ³⁄₄ 2 0 8 7487 7.49
300 ³⁄₄ 25 0 ³⁄₄ 1 1 8 7639 7.64
308 ¹⁄₂ 25 8 ¹⁄₂ 0 0 9 7836 7.84
318 ³⁄₄ 26 8 ³⁄₄ 1 0 9 8096 8.10
324 ³⁄₄ 27 0 ³⁄₄ 0 1 9 8249 8.25
328 ³⁄₄ 27 4 ³⁄₄ 2 0 9 8350 8.35
334 ³⁄₄ 27 10 ³⁄₄ 1 1 9 8503 8.50
342 ³⁄₄ 28 6 ³⁄₄ 0 0 10 8706 8.71
352 ³⁄₄ 29 4 ³⁄₄ 1 0 10 8960 8.96
358 ³⁄₄ 29 10 ³⁄₄ 0 1 10 9112 9.11
363 30 3 2 0 10 9220 9.22
369 30 9 1 1 10 9373 9.37
376 ³⁄₄ 31 4 ³⁄₄ 0 0 11 9569 9.57
387 32 3 1 0 11 9829 9.83
393 32 9 0 1 11 9982 9.98
397 ¹⁄₄ 33 1 ¹⁄₄ 2 0 11 10090 10.09
403 ¹⁄₄ 33 7 ¹⁄₄ 1 1 11 10243 10.24
411 34 3 0 0 12 10439 10.44
421 ¹⁄₄ 35 1 ¹⁄₄ 1 0 12 10700 10.70
427 ¹⁄₄ 35 7 ¹⁄₄ 0 1 12 10852 10.85
431 ¹⁄₂ 35 11 ¹⁄₂ 2 0 12 10960 10.96
437 ¹⁄₂ 36 5 ¹⁄₂ 1 1 12 11113 11.11
445 ¹⁄₄ 37 1 ¹⁄₄ 0 0 13 11309 11.31
455 ¹⁄₂ 37 11 ¹⁄₂ 1 0 13 11570 11.57
Height Of Number Of FTF10 Height Of
Chimney Only Chimney Lengths Chimney Only
Inches Feet/Inches 12" 18" 36" MM M 461 ¹⁄₂ 38 5 ¹⁄₂ 0 1 13 11722 11.72
465 ¹⁄₂ 38 9 ¹⁄₂ 2 0 13 11824 11.82
471 ¹⁄₂ 39 3 ¹⁄₂ 1 1 13 11976 11.98
479 ¹⁄₂ 39 11 ¹⁄₂ 0 0 14 12179 12.18
489 ¹⁄₂ 40 9 ¹⁄₂ 1 0 14 12433 12.43
495 ¹⁄₂ 41 3 ¹⁄₂ 0 1 14 12586 12.59
499 ³⁄₄ 41 7 ³⁄₄ 2 0 14 12694 12.69
505 ³⁄₄ 42 1 ³⁄₄ 1 1 14 12846 12.85
513 ¹⁄₂ 42 9 ¹⁄₂ 0 0 15 13043 13.04
523 ³⁄₄ 43 7 ³⁄₄ 1 0 15 13303 13.30
529 ³⁄₄ 44 1 ³⁄₄ 0 1 15 13456 13.46
534 44 6 2 0 15 13564 13.56
540 45 0 1 1 15 13716 13.71
547 ³⁄₄ 45 7 ³⁄₄ 0 0 16 13913 13.91
558 46 6 1 0 16 14173 14.17
564 47 0 0 1 16 14326 14.33
568 ¹⁄₄ 47 4 ¹⁄₄ 2 0 16 14434 14.43
574 ¹⁄₄ 47 10 ¹⁄₄ 1 1 16 14586 14.59
582 48 6 0 0 17 14783 14.78
592 ¹⁄₄ 49 4 ¹⁄₄ 1 0 17 15043 15.04
598 ¹⁄₄ 49 10 ¹⁄₄ 0 1 17 15196 15.20
602 ¹⁄₄ 50 2 ¹⁄₄ 2 0 17 15297 15.30
608 ¹⁄₄ 50 8 ¹⁄₄ 1 1 17 15450 15.45
616 ¹⁄₄ 51 4 ¹⁄₄ 0 0 18 15653 15.65
626 ¹⁄₄ 52 2 ¹⁄₄ 1 0 18 15907 15.91
632 ¹⁄₄ 52 8 ¹⁄₄ 0 1 18 16059 16.06
636 ¹⁄₂ 53 0 ¹⁄₂ 2 0 18 16167 16.17
642 ¹⁄₂ 53 6 ¹⁄₂ 1 1 18 16320 16.32
650 ¹⁄₄ 54 2 ¹⁄₂ 0 0 19 16516 16.52
660 ¹⁄₂ 55 0 ¹⁄₂ 1 0 19 16777 16.78
666 ¹⁄₂ 55 6 ¹⁄₂ 0 1 19 16929 16.93
670 ³⁄₄ 55 10 ³⁄₄ 2 0 19 17037 17.04
676 ³⁄₄ 56 4 ³⁄₄ 1 1 19 17189 17.19
684 ¹⁄₂ 57 0 ¹⁄₂ 0 0 20 17386 17.39
694 ³⁄₄ 57 10 ³⁄₄ 1 0 20 17647 17.65
700 ³⁄₄ 58 4 ³⁄₄ 0 1 20 17799 17.80
705 58 9 2 0 20 17907 17.91
711 59 3 1 1 20 18059 18.06
718 ³⁄₄ 59 10 ³⁄₄ 0 0 21 18256 18.26
729 60 9 1 0 21 18517 18.52
735 61 3 0 1 21 18669 18.67
739 61 72 0 21 18771 18.77
745 62 1 1 1 21 18923 18.92
753 62 9 0 0 22 19126 19.13
763 63 7 1 0 22 19380 19.38
769 64 1 0 1 22 19533 19.53
773 ¹⁄₄ 64 5 ¹⁄₄ 2 0 22 19641 19.64
779 ¹⁄₄ 64 11 ¹⁄₄ 1 1 22 19793 19.79
787 65 7 0 0 23 19990 19.99
797 ¹⁄₄ 66 5 ¹⁄₄ 1 0 23 20250 20.25
803 ¹⁄₄ 66 11 ¹⁄₄ 0 1 23 20403 20.40
807 ¹⁄₂ 67 3 ¹⁄₂ 2 0 23 20511 20.51
813 ¹⁄₂ 67 9 ¹⁄₂ 1 1 23 20663 20.66
821 ¹⁄₄ 68 5 ¹⁄₄ 0 0 24 20860 20.86
831 ¹⁄₂ 69 3 ¹⁄₂ 1 0 24 21120 21.12
837 ¹⁄₂ 69 9 ¹⁄₂ 0 1 24 21273 21.27
841 ³⁄₄ 70 1 ³⁄₄ 2 0 24 21380 21.38
847 ³⁄₄ 70 7 ³⁄₄ 1 1 24 21533 21.53
855 ¹⁄₂ 71 3 ¹⁄₂ 0 0 25 21730 21.73
865 ³⁄₄ 72 1 ³⁄₄ 1 0 25 21990 21.99
871 ³⁄₄ 72 6 ³⁄₄ 0 1 25 22142 22.14
875 ³⁄₄ 72 11 ³⁄₄ 2 0 25 22244 22.24
881 ³⁄₄ 73 5 ³⁄₄ 1 1 25 22396 22.40
889 ³⁄₄ 74 1 ³⁄₄ 0 0 26 22600 22.60
899 ³⁄₄ 74 11 ³⁄₄ 1 0 26 22854 22.85
905 ³⁄₄ 75 5 ³⁄₄ 0 1 26 23006 23.01
910 75 10 2 0 26 23114 23.11
916 76 4 1 1 26 23266 23.27
924 77 0 0 0 27 23470 23.47
Height Of Number Of FTF10 Height Of
Chimney Only Chimney Lengths Chimney Only
Inches Feet/Inches 12" 18" 36" MM M

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
14
Figure 40
Figure 41
Underside Of Chimney
Chimney Section (S)
FTF10-E30 Return Elbow*
FTF10-30 Offset Elbow* B
A
*Part of Offset/Return Package Model FTF10-ES30
INSTALLING OFFSETS
First, review the Offset Elevation Chart and
Figure 41 for reference.
Step 1. Determine the offset distance where
chimney is to pass through the first ceiling-
dimension “A.” To find this point on your ceil-
ing, first determine the center point for a verti-
cal chimney following the instructions for ver-
tical installation.
Measure height to the ceiling from the top of
fireplace-dimension “B.” Use the appropriate
Offset Elevation Chart to find dimension “A.”
Mark point where you will drive your nail to
showthecenterpointforyouroffsetceilingcut.
Step2.ProceedbyusingtheStraightUpInstal-
lationInstructionsforcuttingandframingceil-
ing and roof openings.
Note: See Framing and Dimension Chart for
thesizesoftheceilingandroofopenings. The
sizeof theroofopeningvarieswiththedegree
of pitch of the roof.
A B FTF10-ES30 Number of FTF10 A B
Offset Height Offset/Return FTF10-S4 Chimney Sections Offset Height
(Inches) (Inches) Elbow Set Stabilizer 12" 18" 36" (mm) (mm)
415³⁄₄ 1 0 0 0 0 102 400
924¹⁄₂ 1 0 1 0 0 229 622
12 29 ³⁄₄ 1 0 0 1 0 305 756
14 ¹⁄₄ 33 ¹⁄₂ 1 0 2 0 0 362 851
17 ¹⁄₄ 38 ¹⁄₂ 1 0 1 1 0 438 978
20 ¹⁄₄ 43 ³⁄₄ 1 0 0 2 0 514 1111
21 45 ¹⁄₄ 1 0 0 0 1 533 1149
22 ¹⁄₄ 47 ¹⁄₂ 1 0 2 1 0 565 1207
25 ¹⁄₄ 52 ¹⁄₂ 1 0 1 2 0 641 1334
26 ¹⁄₄ 54 ¹⁄₄ 1 0 1 0 1 667 1378
28 ¹⁄₄ 57 ³⁄₄ 1 0 0 3 0 718 1467
29 ¹⁄₄ 59 ¹⁄₄ 1 0 0 1 1 743 1505
31 ¹⁄₄ 63 1 0 2 0 1 794 1600
32 ¹⁄₂ 65 1 0 4 1 0 826 1651
34 ¹⁄₄ 68 ¹⁄₄ 1 0 1 1 1 870 1734
36 ¹⁄₄ 71 ³⁄₄ 1 0 3 0 1 921 1822
37 ¹⁄₄ 73 ¹⁄₄ 1 0 0 2 1 946 1861
38 ¹⁄₄ 75 1 0 0 0 2 972 1905
39 ¹⁄₄ 77 1 0 2 1 1 997 1956
41 ¹⁄₂ 80 ¹⁄₂ 1 0 1 4 0 1054 2045
43 ¹⁄₄ 83 ³⁄₄ 1 0 1 0 2 1099 2127
44 ¹⁄₂ 85 ³⁄₄ 1 0 3 1 1 1130 2178
45 ¹⁄₄ 87 ¹⁄₂ 1 0 0 3 1 1149 2223
46 ¹⁄₄ 89 1 0 0 1 2 1175 2261
48 ¹⁄₄ 91 ¹⁄₂ 1 0 2 0 2 1226 2324
49 ¹⁄₂ 94 ¹⁄₂ 1 0 1 5 0 1257 2400
51 ¹⁄₄ 97 ³⁄₄ 1 0 1 1 2 1302 2483
54 ¹⁄₄ 103 1 0 0 2 2 1378 2616
55 ¹⁄₄ 104 ¹⁄₂ 1 0 0 0 3 1403 2654
56 ¹⁄₂ 106 ¹⁄₂ 1 0 2 1 2 1435 2705
59 ¹⁄₂ 111 ³⁄₄ 1 0 1 2 2 1511 2838
62 ¹⁄₂ 116 ³⁄₄ 1 1 1 0 3 1588 2965
65 ³⁄₄ 122 1 1 0 1 3 1664 3099
67 ³⁄₄ 125 ¹⁄₂ 1 1 2 0 3 1721 3188
69 ³⁄₄ 128 ¹⁄₂ 1 1 1 3 2 1772 3264
70 ³⁄₄ 130 ³⁄₄ 1 1 1 1 3 1797 3321
73 ³⁄₄ 136 1 1 0 2 3 1873 3454
75 ³⁄₄ 139 ¹⁄₂ 1 1 2 1 3 1924 3543
79 ³⁄₄ 146 ¹⁄₄ 1 1 1 0 4 2026 3715
81 148 ¹⁄₄ 1 1 3 1 3 2057 3766
82 ³⁄₄ 151 ¹⁄₂ 1 1 0 1 4 2102 3848
87 ³⁄₄ 160 ¹⁄₄ 1 1 1 1 4 2229 4070
FTF10 OFFSET ELEVATION CHART

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 15
Offset Elbow Assembly
Offset elbows install the same as chimney
sections.First,snapthe innersectionINTOthe
precedinginnersectionofflue.Checkconnec-
tion by pulling up slightly to ensure a tight fit.
Next, the outer sections snap lock OVER the
preceding outer section of chimney. Again,
check outer section by pulling up slightly to
ensure proper connection is made.
Return Elbow Assembly
Return elbows install the same way as round
terminations and stabilizers:
Step 1. Hold return elbow over top of last
chimney section.
Step 2. Centerinnerslip section intoinnerflue
pipe-slip down.
Step3.Centerouter-lockingsectionoverouter
chimneypipe.Pushdownuntillockingjointhas
firmly engaged.
Step 4. Pull up slightly on return elbow to
ensure locking joint has firmly engaged.
Step 5. Secure support straps to framing
members by nailing under tension in sheer
( Figure 42 ).
Return
Elbow
Combustion Air Kits
You may use the combustion air kit, Model
FOAK-4orFOAK-4LD,withtheLBR/LBCSeries
fireplaces.Refertotheinstallationinstructions
packed with the air kit for specific installation
information. The outside air kit must be in-
stalledbeforethefireplaceistotallyframedand
enclosed within the finished walls.
The combustion air kit provides for outside air
to be drawn into the fireplace as an aid for
combustion. If installed, only one combustion
airkitisneededanditwillbeinstalledontheleft
side of the fireplace. If additional length of air
duct is necessary, purchase locally available
U.L. Class 0 or Class 1 metallic duct. The duct
mayextendupto50'(15.24m)inanydirection.
Note: When installing the air duct vertically,
DO NOT terminate the air duct closer than 3'
(914 mm) below the chimney top.
Thereisahandoperatedshut-offleverlocatedin
the left side of the fireplace opening behind the
screen. To open, pull all the way. The combus-
tion air damper should be fully open when the
fireplace is in use and completely closed when
thefireplaceisnotbeingused.Thiswillprevent
outside cold air from entering the dwelling.
Operate the actuator through several cycles
including the "lock position. Ensuring proper
operation and freedom of movement. Return
the actuator arm to the locked position.
CAUTION: NEVER LOCATE THE AIR INLET
WHERE IT COULD BE BLOCKED BY SHRUBS,
SNOWDRIFTS,ETC.NEVERLOCATEAIRINLET
INA GARAGE ORIN ANY AREAWHERE THERE
IS ANOTHER FUEL BURNING APPLIANCE OR
PRODUCTS EMITTING COMBUSTIBLE GASES
SUCH AS PAINT, GASOLINE, ETC. IN COLD
CLIMATES IT IS RECOMMENDED THAT THE
COMBUSTION AIR DUCT BE INSULATED.
Theoutsideairductingmaybeinstalledupwards
throughframingandceiling joists,withtheinlet
hoodinstalledthroughanoutsidewall.Airduct-
ing may also be installed downward through
floorjoistsandunderthedwellingtoaventilated
crawlspacenotconsideredpartofthelivingarea.
Note: Do Not terminate the combustion air kit
in an attic space under any circumstances.
Figure 42
Note: The return elbow assembly performs
thesamefunctionasastabilizer.Considerthis
when determining the need for a stabilizer.
Note: Do not apply excessive pressure to any
subsequent chimney section following return
elbow assembly when installing. Ensure that
each subsequent chimney section is securely
attached by testing as noted above.
Forced Air Kit
If you are installing the Lennox Forced Air Kit,
Model LFAK-2000, see the instruction sheet
provided with the kit for electrical wiring re-
quirements. The fireplace has been pre-wired
at the factory but must be connected to main
power supply at the time of installation if the
LFAK-2000istobeinstalledlater.Theelectrical
connectionsmustbemadebeforethefireplace
is framed and enclosed in the finished walls.
CAUTION: ELECTRICAL CONNECTIONS
SHOULD ONLY BE PERFORMED BY A QUALI-
FIED,LICENSEDELECTRICIAN.MAINPOWER
MUST BE OFF WHEN CONNECTING FANS TO
MAIN ELECTRICAL POWER SUPPLY OR PER-
FORMING SERVICE.
Variable Speed Wall Switch
Refer to the installation instructions provided
with the Variable Speed Wall Switch, Model
VSWS, for installation details.
OPTIONAL EQUIPMENT
CONSIDERATIONS
Gas Line Connection
Always plumb gas line installation per local
codes. Check all connections with soap suds;
leaks will bubble. Never test any gas line con-
nection with a match or open flame.
This provision is intended for connection to a
decorative gas appliance incorporating an au-
tomaticshut-offdeviceandcomplyingwiththe
Standard for Decorative Gas Appliances for
installation in vented fireplaces, ANSI Z21.60
(1991) or American Gas Association draft re-
quirementsforGas-FiredLogLightersforWood
Burning Fireplaces, Draft No. 4 dated August,
1993. Install in accordance with the National
Fuel Gas Code, ANSI Z223.1. This complies
with the revised U.L. 127 standard.

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
16
Vent Free Appliances
Theseunitshavebeentested and approved to
ANSI/IAS/AGAZ21.11.2forusewithunvented
gas appliances and complies with the stan-
dard for Factory-Built fireplaces, UL 127.
The unit has been tested for use with any
unventedgaslogsetshavingamaximumrating
of40,000BTU. Theminimummantleconfigu-
rations are outlined in
Figures 43 and 44 .
These fireplaces have been marked with a
maximumratingof 40,000 BTU toassurethat
homeownersdo notexceedtheallowablelim-
its for all allowed installations of mantles.
NEVER INSTALL AN UNVENTED GAS LOG
SET WITH A BTU GREATER THAN 40,000.
CAUTION: WHEN USING THE DECORATIVE
GAS APPLIANCE, THE FIREPLACE DAMPER
MUSTBESETINTHEFULLYOPENPOSITION.
CAUTION:PLUMBINGCONNECTIONSSHOULD
ONLY BE PERFORMED BY A QUALIFIED, LI-
CENSEDPLUMBER.MAINGASSUPPLYMUST
BEOFF WHENPLUMBING GASLINE TOFIRE-
PLACE OR PERFORMING SERVICE.
Ifyou’re installingagasline,connect itbefore
the fireplace is framed and enclosed in the
finishedwall.Thegas knockout is determined
by the indentation located at the bottom and
slightlyoffcenterinthesiderefractories. THE
KNOCKOUT IS ALWAYS REMOVED FROM IN-
SIDE THE FIREPLACE. DO NOT REMOVE THE
KNOCKOUT UNLESS YOU ARE INSTALLING A
GAS LINE. If removal is attempted from the
outer wrapper, side refractory damage may
occur. With a medium-sized hammer, lightly
tap the surface of the indentation. The refrac-
torymaterialisverythininthisareaandiseasily
removed. Once a small hole has been made,
continue tapping until you have reached suffi-
cientdiameterforthegaslinetofitthrough.The
entire knockout does not have to be removed.
Remove insulation in the gas line channel.
IMPORTANT:REPACKINSULATIONMATERIAL
IN SQUARE HOLE AROUND GAS LINE, INTE-
RIORANDEXTERIOROFFIREPLACE,TOSEAL.
Glass Doors
If glass doors are to be installed on these
fireplaces,refertospecificinstallationinstruc-
tionspackedwiththeglassdoors.Useonlythe
doors that are listed for use with these fire-
places. Use of other non-listed glass door on
thesefireplacesmayconstituteapotentialfire
hazard and is not recommended.
CAUTION: CERTAIN GLASS DOORS OVER-
LAPTHEBLACKMETALFACINGOFTHEFIRE-
PLACE.IF THE FIREPLACEHASBEEN FACED
WITH NONCOMBUSTIBLE MATERIALS,
THERE MIGHT NOT BE SUFFICIENT CLEAR-
ANCE TO INSTALL THE GLASS DOORS OF
YOUR CHOICE. ENSURE ADEQUATE CLEAR-
ANCE IS MAINTAINED AT ALL TIMES SO AS
NOT TO INTERFERE WITH THE INSTALLA-
TION AND OPERATION OF GLASS DOORS.
COLD CLIMATE INSULATION
If you live in a cold climate, it is especially
important to seal all cracks around the fire-
place opening with noncombustible material
and wherever cold air could enter the room.
Surroundingmaterialsmustbecaulkedwhere
itmeetstheblack metal facing of the fireplace
to avoid cold air intrusion. Use noncombus-
tiblecaulking materialonlyon fireplacefacing
to seal. Also, the outside air inlet duct should
bewrappedwithnoncombustibleinsulationto
minimize the formation of condensation. Do
not place insulation materials on top of fire-
place or against chimney sections.
Note: A 2" air space must be preserved for all
combustible materials extending for any con-
tinuous length adjacent to the chimney.
It is especially important to insulate between
the studs of an outside chase cavity and under
the floor if the floor is above ground level. Do
not place insulation directly against the fire-
place or chimney system.
The installation of the CCK1 is recommended.
Refer to Steps 6 thru 9 on Page 8.
FIREPLACE FINISHES
It is sometimes best to frame your fireplace
after it is positioned and the chimney is in-
stalled. Frame enclosure for chimney and fire-
place with 2 x 4’s (or heavier) lumber.
Note:Theheadermayrestonthetwo(2)metal
top spacers on top of the unit but the header
must not be notched to fit around the spacers.
Mantels and Trim
These fireplaces may sit directly on a combus-
tiblesurface.A2"airspaceisrequiredbetween
combustible framing and the chimney. In
Canada,theminimumheightforacombustible
mantel is 18" (457 mm) above the fireplace
opening.
Figure 43 shows typical Canadian
installations. ForinstallationsotherthanCanada,
combustiblemantelsandtrimmayeitherproject
infrontorbe flush withthefinishedwallasper
NFPA 211 section 7-2.3.3. and
Figure 44 .
Figure 43
Figure 44
Finished
Wall
Header
8" Max.
(203mm)
Noncombustible
Wall Covering
Fireplace Opening
Canadian Installation
18" Min.
(457mm)
Combustible
Mantel
Spacer
Finished
Wall
Header
Noncombustible
Wall Covering
Fireplace Opening
U.S. Installation
12"
Min.
Combustible
Mantel
Spacer
*A 1-1/2” Projection Is Permitted
Between The Face Top And Mantle
*
12"
Max.
If a mantel is of a noncombustible material, it
isexemptfromtheserequirementsas long as
it does not interfere with the installation or
operation of glass doors, or block the air
circulating opening of the fireplace
Hearth Extensions and Wall Shields
A hearth extension must be installed with
all fireplaces. It is to protect the combustible
floorinfrontofthefireplacefrombothradiant
heat and sparks. The hearth extension must
extend 12" beyond both sides of the fireplace
opening and 20" beyond the front ( see Figure
45 ) . Use a hearth extension constructed of a
durable noncombustible material having an
equalorbetter(lowerkvalue)insulatingvalue
of k = .84 BTU IN/FT2 HR °F or a thermal
resistance that equals or exceeds r = 1.19 HR
°F FT2/BTU IN. With these values, determine
the minimum thickness/material required us-
ing the formula and Page 17 .

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 17
Answer - The minimum required thickness of the Micore 160 is .417”,
therefore round up to nearest standard thickness available which is 1/2”.
** If the hearth extension material(s) that is intended to be used is NOT listed
onTable 1, the materialcan still be usedifthe material(s) isnoncombustible.
However, the manufacturer of the material must provide either the listed k-
value per inch or r-value per inch with listed thickness so that the minimum
thickness required for the hearth can be calculated (per instructions on this
Page and/or as specified in the NFI Certification manuals).
Note:AlsoseeNFI(NationalFireplaceInstitute)CertificationManualsshowing
other acceptable calculation methods and acceptable alternate materials
which can be used.
Listed Material
k (per inch) r (per inch) Listed Min.Thickness
Listed Material .84
K
L
1.19
r
L
1"
T
L
** Approved Alternate Materials for Floor/Hearth Protection
AlternativeMaterials Thermal Values MinimumThickness
(rounded to nearest 1/8 inch)
k (per inch)
K
M
r (per inch)
r
M
Min. Thickness
T
M
Kaowool M Board .47 2.13 .56" (1/2")
Micore 160™
U.S. Gypsum
.35 2.86 .42" (3/8")
Micore 300™
U.S. Gypsum
.46 2.17 .55" (1/2")
Durock™ Cement Board
U.S. Gypsum
1.92 .52 2.29" (2-1/4")
Hardibacker™ 1.95 .513 2.32" (2-3/8")
Hardibacker 500™ 2.30 .435 2.74" (2-3/4")
Cultered Stone Hearth-
stone™ 2.82 .355 3.36" (3-3/8")
Wonderboard 3.23 .31 3.85" (3-7/8")
Super Firetemp M
Johns-Manville
.61 1.64 .73" (3/4")
Super Firetemp L
Johns-Manville
.54 1.85 .64" (5/8")
Face brick 9.00 .111 10.71" (10-3/4")
Common brick 5.00 .20 5.95" (6")
Cement mortar 5.00 .20 5.95" (6")
Ceramic tile 12.5 .08 14.88" (14-7/8")
Marble ~11 ~.09 13.10" (13-1/8")
Table 1
Methods of Determining Hearth Extension and Wall Shield
Equivalents - To determine the thickness required for the alternate
material when either the “k” value or “r” value is known, use either the
k formula or r formula.
Example: If Micore 160 is to be used for the hearth extension fireplace,
how thick must this material be?
kM= k value per inch of
alternate material
rM= r value per inch of alternate material
TM= minimum thickness required for alternate material
TS = standard thickness of the alternate material
kL= k value per inch of listed material
rL= r value per inch of listed material
TL= minimum thickness of listed material
Note: An asterix “*” indicates, it is a value taken from Table 1 .
Using the k formula:
Minimum k-value (per Inch) of Specified min.
thickness of = alternate material (kM) x thickness
alternate k-value (per inch) of listed
material (TM) of listed material (kM) material (TL)
TM(inches) = kMxT
L
*.84
TM(inches) = *.35 x 1"
*.84
.416 (inches) = .416 x 1"
Answer - The minimum required thickness of the Micore 160 is .417”,
thereforerounduptoneareststandardthicknessavailablewhichis1/2”.
Using the r formula:
Minimum r-value (per Inch) Specified min.
thickness of = of listed material x thickness
alternate r-value (per inch) of listed
material of alternate material material
TM(inches) = rLxT
L
rM
TM(inches) = *1.19 x 1"
*2.86
.416 (inches)= .416 x 1"
Figure 45
A
B
D
CC
Hearth Extension Dimensions
A20" 20"
(508 mm) (508 mm)
B38" 43"
(965 mm) (1092 mm)
C12" 12"
(305 mm) (305 mm)
D62" 67"
(1575 mm) (1702 mm)
Opening
Width 38" 43"

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
18
Figure 47
FINISH TO YOUR TASTE
There are a wide variety of “finished looks” for
these fireplaces, from formal wall decor with
elaborate mantels to rustic wood paneling or
warm brick facings.
Only noncombustible materials like stone, tile,
brick, etc., may overlap the black front facing.
Donotextendthesematerialsbeyondtheblack
facing and into the firebox area. Be sure not to
interfere with the installation and operation of
glassdoorsor blocktheupperor lowergrilles.
Sealalljointsbetweentheblackfacingandwall
surrounds to prevent air intrusion. Use non-
combustible caulking material only to seal the
black metal facing to the surround material on
the finished wall.
7-3/4"
(197mm)
Max. Thickness of Hearth Extension when
LBR Models are on the Floor
Figure 48
1-1/2"
(38mm)
Max. Thickness of Hearth Extension when
LBC Models are on the Floor
WARNING: THE CRACK BETWEEN THE
FIREPLACE AND THE HEARTH EXTEN-
SION MUST BE SEALED WITH A NON-
COMBUSTIBLE MATERIAL.
WARNING:WHENINSTALLINGHEARTH
EXTENSION IN FRONT, THE FIREPLACE
MUSTBERAISEDIFHEIGHTOFHEARTH
EXTENSION EXCEEDS 7-3/4" (197MM)
(LBRMODELS)ABOVE THEBOTTOMOF
FIREPLACE ( FIGURE 47 ).
WARNING: THE FIREPLACE MUST BE
RAISED IF THE HEIGHT OF THE HEARTH
EXTENSION EXCEEDS 1-1/2" (38 MM)
(LBC MODELS) ABOVE THE BOTTOM OF
THE FIREPLACE ( FIGURE 48 ).
Secure the hearth extension to the floor to
prevent possible shifting.
Figure 46
Side Wall cannot
be Closer than 12"
(305mm) under
any Circumstances
A
B
C
C
D
Wall
Shield
Note: Any noncombustible material whose k
value is less than .84 or whose r value is more
than 1.19 is acceptable.
If the fireplace is installed on a combustible
floor, use the metal safety strips (provided)
on the floor extending half under the fire-
place and half under the hearth extension
(refer to
Figures 6 & 7) .
A wall shield is required where a continuous
perpendicular side wall is within 12" of the
fireplace opening ( Figure 46 ) . Use a 36" W x
36" H wall shield constructed of a durable,
noncombustible material having an equal or
better(lowerkvalue) insulatingvaluethank=
.54 BTU IN/FT2HR °F. At no time may a
perpendicularsidewallbelocatedcloserthan
9" from the fireplace opening.
Iffireplaceis installeddiagonallyacrossa 90°
corner; no wall shields are required.
Calculating Minimum Thickness if Multiple
Materials are Used
At times it is important to know what
combination of materials are acceptable for
use as floor protection. The “R values” are
usedtodetermineacceptablecombinationsof
materialsbecause“Rvalues”areadditivewhere
r and k values are not.
“Rvalue”= 1/k = “r”xthicknessofmaterial
used
Example: Given that the required “R value”
for a suitable floor protector used must be
equal to or greater than:
“R” = rLx TL= 1.19 x 1” = 1.19.”
If it is desired to elevate a marble hearth ex-
tensionto alevelof5”ormoreabove thefloor
surface. What combination of noncombus-
tiblematerialscanbeusedtoaccomplishthis?
If common brick is used so that the 3 1/2”
dimension is the height, “R” for the common
brick becomes:
brick
“R”M= rMx TS= 0.20 x 3 1/2" = .70
Using 1/2” of mortar to set the brick, “R” for
the mortar is calculated as follows:
mortar
“R”M= rMx TS= 0.20 x 1/2" = .10
Next,a 3/4"marbleslabsetin1/2"mortarcov-
ers the brick, “R” for the marble and mortar
becomes:
marble
“R”M= rMx TS= 0.05 x 3/4" = .038
mortar
“R”M= rMx TS= 0.20 x 1/2" = .10
The sum of all “R values” is: .70 + .10 +. 038
+ .10 = .938
ThiswouldNOTbeanacceptablecombination
of material for the hearth extension since the
totalcalculated“Rvalue”ofthematerialsused
is under the required “R value” of 1.19. An
additional layer of insulating materials must
be used.
Note: Also see NFI Certification Manuals for
expanded explanation on calculating “R val-
ues” when multiple materials are used.

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 19
Storm Collar 63L59 FSC
Figure 49
Outside Combustion Air Kits
(with duct) 81L87 FOAK
(without duct) 81L88 FOAK-LD
Firestop Spacer (30°) 63L37 F10FS30-2
INSTALLATION COMPONENTS
The following items are available for use in the
installation of this appliance.
Model Catalog Number Weight
LBR-3824 11M70 225 lbs.
LBC-3824 11M72 225 lbs.
LBR-3824-H 11M74 225 lbs.
LBC-3824-H 11M76 225 lbs
LBR-4324 11M71 250 lbs.
LBC-4324 11M73 250 lbs.
LBR-4324-H 11M75 250 lbs.
LBC-4324-H 11M77 250 lbs.
18"
(457mm) 45˚
Combustible Materials
Allowed in Shaded
Area
1"
(25mm)
18" (457mm)
Minimum Distance
to Protected Side Wall
LBR Models
Figure 50
4-17/32"
(115mm) 30˚
Combustible Materials
Allowed in Shaded
Area
1/2"
(13mm)
12" (305mm)
Minimum Distance
to Protected Side Wall
LBC Models
Firestop Spacer (Flat) 63L36 F10FS-2
Chimney Section 63L16 FTF10-12
63L17 FTF10-18
63L18 FTF10-36
Canadian 62L94 FTF10-18C
Outside Chimney 62L95 FTF10-36C
63L40 F10F6
Flashing 63L41 F10F12
Chase Termination
(Square) 63L49 FTF10-CT1
Chase Termination
(Round) 63L55 FTF10-CTDTM
Locking Band 63L60 FLB
Stabilizer 63L26 FTF10-S4
Combustible materials may project beyond
the sides of the fireplace opening as long as
they are kept within the shaded area, as
illustrated in
Figure 49 for LBR models and
Figure 50 for LBC models.

20
INSTALLATION COMPONENTS
(continued)
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Forced Air Kit 12M73 LFAK-2000
Cold Climate Kit 63L63 FTF10-CCK1-LD
Chase Termination 96L21 FTF10-CTT Arch Type Termination 96L23 FTF10-ATT
Variable Speed
Wall Switch 045571H VSWS
Firestop Attic Shield
(Canada Only) 63L68 FTF10-FSAS
Offset/ Return
Package (30°) 63L23 FTF10-ES30
Chase Termination
(Square) 63L52 FTF10-CT2
Combination
Offset/Return Elbow 63L34 FTF10-OR15
Printed in U.S.A. © 2001/2011 LENNOX HEARTH PRODUCTS
P/N 850003M Rev. H 10/2011
Lennox Hearth Products reserves the right to make changes at any time, without notice, in design,
materials, specifications, and prices, and also to discontinue colors, styles, and products.
Consult your local distributor for fireplace code information.
1508 Elm Hill Pike, Suite 108 •Nashville, TN 37210