Makita Indoor Fireplace EST 48 User Manual

INSTALLATION  
INSTRUCTIONS  
ESTATE SERIES  
48" Wood Burning Fireplaces  
P/N 850,006M REV. D 05/2005  
LENNOX HEARTH PRODUCTS  
MODELS  
EST-48  
EST-48-H  
This installation manual will enable you to obtain a safe, efficient and  
dependable installation of your fireplace system. Please read and under-  
stand 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.  
RETAIN THESE INSTRUCTIONS  
FOR FUTURE REFERENCE  
WH Report No. 629-915173  
 
Note: Illustrations shown reflect typicalinstal-  
lations with nominal dimensions and are for  
design and framing reference only. Actual instal-  
lations may vary due to individual design prefer-  
ences.However,alwaysmaintainminimumclear-  
ances to combustible materials and do not vio-  
late any specific installation requirements.  
When complete these fireplace systems con-  
sists of four basic sub-systems:  
PRECAUTIONS  
Note: These fireplace systems are not difficult  
to install. However, in the interest of safety, it  
is recommended that the installer be a quali-  
fiedorcertifiedtradesmanfamiliarwithcom-  
monlyacceptedfireplaceinstallationandsafety  
techniques as well as prevailing local codes.  
1. The Fireplace  
2. The Chimney and Termination  
3. The Optional Glass Doors  
4. The Optional Combustion Air Kits  
Thesefireplaceshavebeentestedandlistedby  
Warnock Hersey (Report No. 629-915173) to  
U.L. standard 127. These units are intended  
for installation in residential homes and other  
buildings of conventional construction includ-  
ing commercial, not in mobile homes.  
CLEARANCES AND HEIGHT  
REQUIREMENTS  
The most important areas of concern dealing  
with the installation of factory-built fireplaces  
areclearancestocombustiblematerials,proper  
assembly of component parts, height of the  
chimney system, the proper use of accesso-  
ries supplied by the manufacturer and the  
techniques employed in using finishing mate-  
rials applied to the wall surrounding the fire-  
place, hearthextensionsandwallshields. Each  
of these topics will be covered in thorough  
detail throughout this manual. Please give  
each your special attention as you progress  
with your installation.  
The fireplace may be placed on or near normal  
construction materials*. The combustion air  
kit,firestopspacerandroofflashing(notchase  
flashings) may be placed directly on or against  
normal construction materials.* The chimney  
pipe requires a minimum 2" air space to com-  
bustibles, and the fireplace wrapper requires a  
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  
BOCA Basic/National Codes, the Standard Me-  
chanicalCodeandtheUniformBuildingCodes.  
minimum 1" air space to combustibles.  
A
combustiblemantlemaybeinstalled12"above  
the opening of the fireplace as per NFPA 211,  
Section 7-2.3.3.  
INTRODUCTION  
General Information  
The minimum installed height of the completed  
fireplacesystemis15'6". Themaximumheight  
is 80' 0".  
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.  
These fireplaces are conventional radiant heat  
fireplaces with standard bar grates, optional  
outside combustion air kits and optional deco-  
rative glass doors.  
The fireplace and chimney system must be  
enclosed when installed in or passing through  
alivingareawherecombustiblesorpeoplemay  
come in contact with it. This is important to  
prevent possible personal injury or fire hazard.  
TYPICAL INSTALLATION  
For questions, please call your distributor or  
the manufacturer. Special restrictions apply to  
the front and facing of the fireplace and nearby  
walls (See pages 16 and 17 ).  
Chimney and  
Termination  
CHIMNEY SYSTEM  
These fireplaces are designed and code listed  
for use with Security Chimneys FTF13 chimney  
System only. Always use Security Chimneys  
FTF13 chimney components with these fire-  
places. Do not modify or alter these compo-  
nents as this may cause a potential serious  
hazard and void the Warranty.  
*Construction Materials:  
framing materials paneling  
particle board  
millboard  
plywood  
flooring  
dry wall  
etc.  
Figure 1  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
3
 
Insulate Joists  
19"  
Note: Do not insulate the chase cavity with  
blown or fill type insulation materials.  
Same As Ceiling  
(483mm)  
19"  
(483mm)  
Damper  
Closed  
Damper  
Open  
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.  
Draft Stops  
Combustion  
Air Actuator  
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' and  
mustalsomeetminimumheightrequirements.  
Refer to the minimum system height chart.  
F10FS-2  
Firestop  
FTF13-CT2  
Figure 3  
Termination  
Note: Non-  
Combustible  
Chase  
LOCATION OF FIREPLACE  
Minimum System Height  
Security's FTF13 Pipe  
Flashing  
must be  
Used to  
Cover  
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 and assembly.  
Chase  
Opening  
Vertical Installation  
One Offset  
15' 6"  
18' 0"  
20' 0"  
Optional  
Insulation  
in Outside  
Walls of  
Chase  
Two Offsets  
Chase Enclosure  
A chase is a vertical box-like structure con-  
structedtosurroundthefireplaceandchimney.  
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.  
8'  
(2.4m)  
Level  
Hearth  
Hearth  
Solid  
Continuous  
Surface  
Outside  
Base  
Insulation  
(Thermal Barrier)  
Optional  
Figure 2  
Outside Chase  
Figure 4  
WARNING: IF INSULATION IS USED, THE  
FIREPLACE MUST NOT BE PLACED DI-  
RECTLY AGAINST IT. INSULATION OR  
VAPORBARRIERS,IFUSED,MUSTFIRST  
BE COVERED WITH GYPSUM BOARD,  
PLYWOOD,PARTICLEBOARDOROTHER  
MATERIALTOASSUREINSULATIONAND  
VAPOR BARRIERS REMAIN IN PLACE.  
Carefully consider the position of the fireplace  
opening with respect to the location of adja-  
cent or nearby stairwells, bath or kitchen ex-  
haustfansand/orreturnairregistersforforced  
air furnaces/air conditioners that could cause  
a smoking fireplace condition if the house is  
tightly insulated.  
ASSEMBLY OUTLINE  
Before You Start  
Check your inventory list to be sure you have all  
the necessary parts supplied in good usable  
condition.Checkalsoforanyconcealeddamage.  
Whenlocatingthefireplace,considerationmust  
be given to combustibles and final finishing.  
See Figure 5 and confine the final location of  
combustiblefinishmaterialstothe"SafeZone".  
Checktheoperationofthedamper.Thedamper  
is controlled through the use of a control lever  
located within the firebox opening at the top  
center just behind the firebox lintel (Figure 3 ).  
The control lever snaps into place at the ex-  
treme range of motion, up and back in the  
closed position. When pulled forward and  
down, the damper is open.  
WARNING: DO NOT PACK OR FILL RE-  
QUIRED AIR SPACES WITH INSULATION  
OR OTHER MATERIAL. NO MATERIAL IS  
ALLOWED IN THESE AREAS.  
DO NOT permanently place furniture or other  
items such as decorative pillows within 60" of  
the fireplace front face.  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
4
 
The fireplace may be positioned and then the  
framing built around it, or the framing may be  
constructed and the fireplace positioned into  
the opening.  
Black Portion Of Frame  
Not To Be Covered With  
Combustible Materials  
Wall  
Covering  
Combustible  
Wall  
3 ¹⁄₄"  
Usually, no special floor support is needed for  
the fireplace, however, to be certain:  
4 ³⁄₄"  
¹⁄₂”  
15°  
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.  
1"  
Door  
Opening  
Hearth  
Extension  
Safe  
Zone  
12”  
Metal Safety Strip  
Floor  
Figure 5  
2. Measure the square footage of the floor  
space to be occupied by the system, surrounds  
and hearth extensions.  
ASSEMBLY STEPS  
Figure 6  
Note: The following steps represent the normal  
sequence of installation. Each installation is  
unique, however, and might require a different  
sequence.  
3.Notethefloorconstruction,i.e.2x6s,2x8s  
or 2 x 10s, single or double joists, type and  
thickness of floor boards.  
Zero Clearance  
to Rear and  
Side Spacers  
1"  
4. Use this information and consult your local  
building code to determine if you need addi-  
tional support.  
1. Position firebox prior to framing or into  
prepared framing.  
Combustible  
Wall  
2. Install the chimney system.  
CAUTION: DO NOT BLOCK THE HEAT-CIRCU-  
LATING AIR INLET AND OUTLET PORTS ON  
FACE SIDES. DOING SO MAY RESULT IN A  
POTENTIAL FIRE HAZARD.  
Hearth  
Extension  
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.)  
If you plan to raise the fireplace and hearth  
extension, build the platform assembly then  
position fireplace and hearth extension on top.  
Secure the platform to the floor to prevent  
possible shifting.  
Metal Safety Strip  
Figure 7  
Platform  
Floor  
5. Complete the installation, finish wall mate-  
rial, surround and hearth extension to your  
individual taste.  
The safety strips should extend from front of  
the fireplace at least 2" and should extend to be  
at least flush with the sides. In the event a  
wooden support is used to elevate the fireplace  
abovethefloor,aZtypesafetystripshouldbe  
fabricated and used to protect the front surface  
ofthewoodsupportaswellasthefloorbeneath  
the hearth extension (Figures 8 and 9 ). The  
safety strips should be tacked down to prevent  
possible movement.  
INSTALLING THE FIREPLACE  
6. Assemble and attach optional glass door  
assembly.  
Step 1. Slide the fireplace into prepared fram-  
ing or position fireplace in its final position and  
frame later.  
Study the three dimensional illustration (Fig-  
ure 1 ) to get a general idea of each element of  
your fireplace system.  
The fireplace may not be recessed into a com-  
bustible floor. Maintain the floor to hearth  
clearance established by the fireplace lower  
front face.  
PRE-INSTALLATION NOTES  
Note: The Ztype safety strip is not supplied.  
The fireplace may be installed directly on a  
combustible floor or raised on a platform of an  
appropriate height. Do not place fireplace on  
carpeting, vinyl or other soft floor coverings. It  
may, however, be placed on flat wood, ply-  
wood, particle board or other hard surfaces.  
Step 2. Insert the provided metal safety strips,  
beneath the fireplace as illustrated (Figures 6, 7  
and 8 ). The safety strips should overlap ¹⁄₂" for  
continual coverage of the floor.  
Step 3. Refer to fireplace drawings and specifi-  
cationsonpages6and7forframingdimensions  
and details. Frame appliance enclosure as illus-  
trated in Figures 11 through 14 on page 7.  
Note: Safety strips are not required when fire-  
place rests on a noncombustible surface.  
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.  
Note: Install the hearth extension only as illus-  
trated.  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
5
 
FIREPLACE SPECIFICATIONS  
15"  
8 ⁹⁄₁₆"  
48"  
2"  
Metal Safety Strips  
with 1" Overlap  
45 ¹⁄₈"  
28"  
Figure 8  
8 ⁹⁄₁₆"  
59 ³⁄₈"  
Platform  
Front  
14 ¹ꢀ₄"  
14 ¹ꢀ₄"  
2"  
Special ZMetal Safety  
Strips with 1" Overlap  
1"  
1"  
Figure 9  
IMPORTANT: UNDER NO CIRCUMSTANCES  
CAN THE FIREPLACE TOP SPACERS (FIGURE  
10 ) BE REMOVED OR MODIFIED, NOR MAY  
YOU NOTCH THE HEADER TO FIT AROUND OR  
BE INSTALLED LOWER THAN THE SPACERS.  
THE HEADER MAY BE IN DIRECT CONTACT  
WITH THE TOP SPACERS BUT MAY NOT BE  
SUPPORTED BY THEM.  
53 ¹⁄₄"  
53 ¹⁄₄"  
Gas  
Line  
Combustion  
Air Access  
Access  
11 ⁵⁄₈"  
13 ³⁄₄"  
Gas Line  
Access  
11 ¹⁄₈"  
10"  
10"  
13 ³⁄₄"  
Note: The framed depth, 29 ³⁄₄" (755 mm)  
from a framed wall, must always be measured  
from a finished surface. If a wall covering such  
as drywall is to be attached to the rear wall,  
then the framed depth must be measured from  
the drywall surface. It is important that this  
dimension be exact.  
30 ³⁄₈"  
30 ³⁄₈"  
Left Side  
Right Side  
44 ¹⁄₂"  
If the appliance is to be elevated above floor  
level, a solid continuous platform must be  
constructed.  
15"  
13 ¹ꢀ₄"  
29 ³⁄₈"  
The header may rest on the top metal spacers,  
but must not be notched to fit around them.  
12 ¹⁄₂"  
Consult all local codes.  
6"  
⁵⁄₈"  
Top View  
Figure 10  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
6
 
FRAMING SPECIFICATIONS  
Framing Dimensions  
Model EST-48  
Back Wall of  
Chase/Enclosure  
Including Finising  
Materials  
FOAK Combustion  
Air Kit - Optional  
if any  
A
59 ¹⁄₂" 1511 mm  
D
B
C
D
E
F
G
J
53 ³⁄₈" 1346 mm  
K
F
44 ꢀ⁄₂"  
22 ¹⁄₄"  
104"  
1130 mm  
565 mm  
2641 mm  
1321 mm  
755 mm  
806 mm  
A
E
Rough  
Framing Face  
(Unfinished Shown)  
52"  
Corner Installation  
29 ³⁄₄"  
31 ³⁄₄"  
B
Figure 14  
K
73 ¹⁄₂" 1867 mm  
A
Note: All framing dimensions calculated for 1/2"  
dry wall at the fireplace face. If sheathing the  
chaseorfinishingwithotherthicknessmaterials,  
calculations will need to be made. False header  
should be constructed of 2 x material only.  
Figure 11  
Back Wall of Chase/Enclosure  
FOAK  
Including Finising Materials if any  
Combustion  
Air Kit  
Framing Dimensions for Ceiling  
B
A
Flue Type  
A
B
G
Ceiling Framing  
FTF13 Vertical  
19"  
19"  
(483 mm) (483 mm)  
Figure 15  
A
Rough  
Framing Face  
(Unfinished  
Shown)  
FTF13  
Offset 30°  
19"  
29"  
Inside Chase  
(483 mm) (737 mm)  
Figure 12  
Framing Dimensions for Roof  
Back Wall of Chase/Enclosure  
Including Finising Materials  
if any  
FOAK  
Combustion  
Air Kit - Optional  
Pitch  
0/12  
C
D*  
C
19"  
19"  
(483 mm)  
(483 mm)  
G
J
6/12  
19"  
(483 mm)  
22"  
(559 mm)  
C
A
Rough  
D
Framing Face  
12/12  
19"  
(483 mm)  
27"  
(686 mm)  
Outside Chase  
(Unfinished Shown)  
Roof Framing  
* Perpendicular to roof ridge  
Figure 13  
Figure 16  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
7
 
CAUTION: ALLOW MINIMUM 2" CHIMNEY  
AIRSPACETOCOMBUSTIBLEFRAMINGMEM-  
BERS THROUGHOUT VERTICAL OR OFFSET  
CHIMNEY INSTALLATION.  
Room Above  
Anchor Tab  
A minimum 2" air space must be reserved for  
all combustible materials extending for any  
continuous length surrounding the chimney.  
Firestop Spacer  
Reference Figures 15 and 16 and charts Fram-  
ing Dimensions for Ceiling and Roof, which  
specify minimum ceiling and roof dimensions.  
Figure 20  
Attic Above  
Figure 17  
In new construction, to determine chimney cen-  
terline, useplumblinefromrooforceilingabove  
fireplace to center of flue collar on fireplace.  
Step 4. The fireplace should be secured to the  
side framing members using the nailing flange.  
Use 8d nails (Figure 18 ).  
For remodeling, plumb to center of flue collar  
from ceiling above, drive nail through ceiling  
from below to mark position, then mark and  
cut to passage from above ceiling (around  
nail) (Figure 19 ). Then plumb from ceiling or  
roof level directly above hole which has just  
been completed.  
Firestop Spacer  
Figure 21  
Nailing  
Flange  
CHIMNEY 30° OFFSET THROUGH FLOOR  
OR CEILING  
Framing  
Stud  
8d Nail  
Itmaybenecessarytoassemblethechimneyat  
30° when passing through the floor or ceiling  
area. Use the F10FS30-2 firestop spacer as  
shown in Figures 22 and 23. Support the  
chimney at floor or ceiling penetration with a  
FTF10 stabilizer if distance of chimney below  
ceiling is 10' or more. Maintain 2" minimum air  
space to combustibles from chimney sections.  
Plumb Line  
Figure 18  
Note: The nailing flange and the area directly  
behind the nailing flange is exempt from the  
clearancesdescribedonthefireplaceclearance  
label.  
Attic Space  
F10FS30-2  
2" Min.  
Firestop Spacer  
Air Space  
Note: The nailing tabs and the area directly  
behind the nailing tabs are exempt from the  
clearances described on page 5. Maintain at  
least 1/2" clearance from the firebox wrapper to  
the framing at the closest point of contact,  
directly adjacent to the flange.  
Figure 19  
FTF10-S4  
2" Min.  
Step 3. Position appropriate firestop spacer at  
ceiling and nail temporarily with two (2) 8d nails.  
Use flat firestop spacer, Model F10FS-2, if chim-  
ney penetrates ceiling vertically. If chimney pen-  
etrates ceiling at 30° angle (offset chimney), use  
30° firestop spacer, Model F10FS30-2. Use one  
nail on opposite sides to hold firestop spacer in  
position. Nail permanently, using at least two (2)  
more 8d nails, after chimney sections have been  
assembled through the firestop spacer and after  
any necessary adjustments have been made.  
Firestop spacer must be secured by at least four  
(4) 8d nails when completely installed.  
Stabilizer  
Air Space  
10'  
Max.  
30° Firestop  
And Attic Above  
INSTALLING THE CHIMNEY SYSTEM  
Figure 22  
Step 1. Before continuing, check the operation  
of the damper, as described on page 4, (refer to  
Figure 3 ).  
Room Above  
F10FS30-2  
2" Min.  
Firestop Spacer  
Air Space  
Step 2. Using standard construction framing  
techniques,constructopeningforchimneyroute  
upthroughtheceiling(s)androoforthroughan  
outside chase.  
2" Min.  
FTF10-S4  
Stabilizer  
Note: If there is a room above ceiling level,  
firestop spacer must be installed on the bottom  
side of the ceiling. If an attic is above ceiling  
level, firestop spacer must be installed on top  
side of ceiling joist (Figures 20 and 21 ).  
Air Space  
Framing must maintain adequate minimum air  
space clearance at all times.  
30° Firestop  
10'  
Max.  
And Room Above  
Figure 23  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
8
 
Step4.Note:Chimneysectionsareconstructed  
with a unique locking tab design, which en-  
sures an immediate, tight assembly between  
sections.Planyourchimneyrequirementscare-  
fully before assembly as chimney is difficult to  
disassembleafterinstallation. Ifdisassembled,  
the tabs might become damaged. Be certain  
tabsareproperlyformedtoensurelockingtabs  
engage properly.  
Note: Assemble one component of chimney at  
a time (inner section first, then outer section  
last) before proceeding with the next complete  
section.  
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.  
Continue to assemble the chimney up through  
framed opening. Assemble just enough to pen-  
etrate the roof flashing openings (Figure 26 ).  
Always maintain 2" minimum air space to com-  
bustiblematerialsandalwayscheckeachchim-  
ney joint (inner and outer) to ensure proper  
engagement. Checkverticalalignmentofchim-  
ney so that it projects from the roof in true  
vertical position.  
Step 6. Select the proper Security Chimneys  
roof flashing based on pitch of roof. Use chart  
below for selection:  
The Security Chimneys FTF13 chimney system  
is a two piece chimney, which snap together  
from the fireplace up. Start with the inner flue  
section with the lanced end up, snap lock it in to  
thematchingcollarontopofthefireplace. Atall  
subsequent joints, the upper flue section fits  
into the preceding flue section. Each piece  
snaps together by means of locking tabs (9  
locking tabs per joint). Check each piece by  
pullingupslightlyfromthetoptoensureproper  
engagement before installing the next section.  
If the flue has been installed correctly, it will not  
separate when you test it. Also, the inner flue  
joint where each section is joined should be  
tight and flat without gaps (Figure 24 ).  
Roof Pitch  
Model  
F10F6  
Flat to 6/12  
6/12 to 12/12  
F10F12  
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 28 ). Again, check the vertical  
position of the chimney and the 2" minimum air  
space to combustibles.  
2" Min. Air Space  
To Combustibles  
Figure 26  
FTF13 Chimney  
Do Not Seal  
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 36 ).  
Flashing Spacers  
FTF10 Flashing  
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 FTF13-S4 stabilizer in-  
stalled at 30' intervals.  
Figure 28  
Note:TheModelFTF13-S4adds3"neteffective  
height to the total chimney system.  
Figure 24  
Note:Donotcaulkorsealtheventilatingopenings.  
Outer pipe section installs in just the opposite  
way; the lanced end goes down and each new  
section goes OVER the outside of the previous  
section installed (Figure 25 ).  
Step 7. Secure flashing by nailing along the  
perimeter into roof using 8d nails. If shingled  
roof, slide upper end and sides of roof flashing  
under shingles (trim if necessary), seal the top  
and both sides of the flashing to the roof with  
roof caulking. Cover nail heads with roof caulk-  
ing (Figure 29 ).  
Install the Model FTF13-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  
8d nails. Attach successive lengths of chimney  
pipe directly to stabilizer using same tech-  
niques as described in Step 4 (Figure 27 ).  
Locking  
Tabs  
(Lances)  
Figure 25  
Stabiliezr  
Figure 29  
Note: F10 flashings and firestops are compat-  
ible with FTF13 chimney.  
Figure 27  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
9
 
Step 8. The standard Security Chimneys F10  
roofflashingassembliesincludeastormcollar.  
Slide the storm collar over outer chimney, rest  
on flashing spacers and align with top surface  
offlashing. Inserttabinslot, pulltightandbend  
tab back over slot. Seal storm collar to outer  
chimney with roof caulking or mastic around  
entire circumference of pipe. Also add extra  
roof caulking to the tab/slot area to seal com-  
pletely against water penetration (Figure 30 ).  
Check all joints very carefully to ensure no  
water intrusion can take place.  
Step10.UsingaFTF13-CTDRoundTermination:  
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, rust preventative paint designed  
for metal. This is especially important when  
installationsaremadeinabnormallyadverseor  
corrosive environments; such as near lakes,  
oceans or in areas with consistently high hu-  
midity conditions. Consult the paint manufac-  
turers instructions for proper preparation and  
application.  
1. HoldtheFTF13-CTDovertopoflastchimney  
section (Figure 32 ).  
2. Center inner slip section in inner flue pipe-  
slip down.  
TEN FOOT RULE SUMMARY  
CTD  
Termination  
Chimney  
Locking Band  
Mastic  
The minimum chimney height above the roof  
and/or to adjacent walls and buildings is speci-  
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.  
Figure 32  
3. Center outer locking section over outer flue  
pipe. Push down until locking tabs are firmly  
engaged.  
If the horizontal distance from the chimney  
edge to the peak of the roof is more than 10' a  
chimney height reference point is established  
on the roof surface 10' horizontally from the  
chimney edge. The top of the chimney must be  
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.  
4.PullupslightlyonCTDtoensurelockingjoint  
has firmly engaged.  
Figure 30  
Using a FTF13-CT1 Chase Termination:  
Step 9. Security Chimneys locking bands,  
Model FLB, may be required if the chimney  
extends too high above the roof flashing. As a  
general rule, if the chimney extends more than  
6' above the roof flashing, the use of locking  
bands is advisable to strengthen the chimney  
assembly. Align the locking band at the chim-  
ney joint. Locking bands wrap around pipe  
joints equally covering the joints of both pipe  
sections. Use the nut provided and TIGHTEN  
snugly. Do not overtighten as this might dam-  
age the chimney section (refer to Figure 30 ).  
Refer to specific installation instructions in-  
cluded with FTF13-CT1 chase terminations for  
clearance and installation details.  
The 2' in 10' rule is necessary in the interest of  
safety but does not ensure smoke-free opera-  
tion. Trees, buildings, adjoining roof lines, ad-  
verse wind conditions, etc., may require a taller  
chimney should the fireplace not draft properly  
(see Figure 33 ).  
Using a FTF13-CT2 Chase Termination:  
Refer to specific installation instructions in-  
cluded with FTF13-CT2 chase terminations for  
clearance and installation details.  
Less Than 10'  
Note: If chimney extends more than 8' above  
roof surface, guy wires are also recommended.  
Use three (3) guy wires, attach to locking band  
assembly, extend and secure to roof in a trian-  
gular pattern (Figure 31 ). Guy wires are not  
supplied by the manufacturer.  
2' Min.  
3'  
Min  
10'  
3'  
Min  
Roof Ridge  
Figure 33  
120°  
Figure 31  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
10  
 
3. The effective heights of various components  
are:  
A ¹⁄₈" diameter hole must be drilled in the  
chimney joint using a ¹⁄₈" diameter drill. Hole  
should be drilled in center of joint overlap (see  
Figure 38 ). Be sure to drill only through the  
outer chimney casting. Do not puncture the  
inner flue.  
MULTIPLE TERMINATIONS  
If more than one termination is located in the  
samechaseorwithinthesamegeneralproxim-  
ity, we suggest they should be separated in  
distance at least 24" horizontally from flue cen-  
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 34 ).  
The Fireplace  
FTF13-12  
FTF13-18  
FTF13-36  
= 52 ¹⁄₂"  
= 10 1/4"  
= 16 1/4"  
= 34 1/4"  
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'.  
FTF13-CTD termination = 4"  
FTF13-CTDT termination = 12" to 18"  
FTF13-CT1 termination = 12" to 18"  
FTF13-CT2 termination = 15" to 23"  
This suggestion is provided in the interest of  
better operation. If the terminations are located  
too close to each other, smoke may migrate  
from one flue into the other.  
FTF13-S4 stabilizer*  
= 3"  
Return elbow support straps must be securely  
attached under tension (in shear) to structural  
framing members above. Do not substitute a  
FTF13-30 offset elbow in place of a FTF13-E30  
return elbow.  
* Required for every 30' of vertical chimney  
and/or 10' of offset chimney.  
4. Determine the amount of chimney height  
required by subtracting the total combined  
height of all pre-selected components (fire-  
place and chimney components from the total  
desired height).  
18"  
OFFSET CALCULATIONS  
18"  
Step 1. Use Offset Chart to determine amount  
of horizontal offset (A) and height (B) for  
various chimney section assemblies.  
5. Reference the Vertical Elevation Chart and  
determine the number of chimney sections  
(quantity and length) required.  
Step 2. Use Height of Chimney Onlycolumn  
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.  
SPECIAL OFFSET INSTRUCTIONS  
24"  
24"  
To clear any overhead obstructions, you may  
offset your chimney system using Security's  
30° offset and return elbows. Use two elbows -  
an offset elbow to initiate the offset and a return  
elbow to terminate it. A 30° offset elbow, an-  
gling in any direction, may be the first compo-  
nent used off the top of the fireplace flue collar.  
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 22 and 23 and  
stabilizers as shown in Figure 27.  
Figure 34  
FTF13 CHIMNEY COMPONENT  
CALCULATIONS  
The offset and return elbows may be attached  
together, or a section or sections of chimney  
may be used between, but do not exceed 20' in  
total length between elbows. If sections of  
pipe exceed 10' between elbows, a chimney  
stabilizer must be used at the midpoint (Figure  
35 ). The stabilizer support straps must be  
attached under tension (in shear) to structural  
framing members above. When two sets of  
elbows are used, the maximum combined  
length of chimney used between elbows can-  
not exceed 20' (see Figure 36 ). Example: If C1  
= 10' then C2 cannot exceed 10'.  
The minimum installed height of the EST-48  
fireplaces system is 15' 6", higher with offsets.  
The maximum height for the system is 80'.  
A1  
Return  
Elbow  
To determine the number of chimney sections  
andchimneycomponentsrequired,followthese  
steps:  
20'  
Max.  
B1  
1. Determine the total vertical height of the  
fireplaceinstallation.Thisdistanceismeasured  
from the surface the fireplace rests on to the  
point where smoke exits the termination.  
Stabilizer  
10' Max.  
2. Determine the number of chimney compo-  
nents required, except chimney sections. This  
wouldincludefirestopspacers,stabilizers,roof  
flashing, etc.  
Offset  
Elbow  
If an offset exceeds 6' in length, each chimney  
joint beyond the first 6' of offset to the return  
elbow, must be secured by a No. 8 x ¹⁄₂" sheet  
metal screw located at the underside of the  
joint (see Figure 37 ).  
Figure 35  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
11  
 
FTF13 VERTICAL ELEVATION CHART  
Height Of  
Chimney Only  
Number Of FTF13  
Chimney Lengths  
Height Of  
Chimney Only  
Height Of  
Chimney Only  
Number Of FTF13  
Chimney Lengths  
Height Of  
Chimney Only  
Inches Feet/Inches 12"  
18"  
36"  
MM  
M
Inches Feet/Inches 12"  
18"  
36"  
MM  
M
11  
17  
21 ¹⁄₄  
27 ¹⁄₄  
33 ¹⁄₄  
35  
0
1
1
2
2
2
3
3
4
4
5
5
5
6
7
7
7
8
9
9
11  
5
9 ¹⁄₄  
3 ¹⁄₄  
9 ¹⁄₄  
11  
1 ¹⁄₄  
7 ¹⁄₄  
3 ¹⁄₄  
7 ¹⁄₄  
1 ¹⁄₄  
7 ¹⁄₄  
9 ¹⁄₄  
7 ¹⁄₄  
1 ¹⁄₄  
5 ¹⁄₂  
11 ¹⁄₂  
7 ¹⁄₄  
5 ¹⁄₂  
11 ¹⁄₂  
1
0
2
1
0
0
2
1
0
2
1
0
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
1
0
1
2
0
1
2
1
0
1
2
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
0
0
0
0
0
1
0
0
1
1
1
1
2
2
2
2
2
3
3
3
3
3
4
4
4
4
4
5
5
5
5
5
6
6
6
6
6
7
7
7
7
7
8
8
8
8
8
9
279  
432  
540  
692  
845  
889  
946  
0.28  
0.43  
0.54  
0.69  
0.85  
0.89  
0.95  
1.10  
1.30  
1.40  
1.56  
1.71  
1.76  
2.01  
2.17  
2.27  
2.43  
2.62  
2.88  
3.03  
3.14  
3.30  
3.49  
3.75  
4.91  
4.01  
4.17  
4.36  
4.62  
4.78  
4.88  
5.03  
5.23  
5.48  
5.64  
5.75  
5.90  
6.10  
6.36  
6.51  
6.62  
6.77  
6.97  
7.23  
7.38  
7.49  
7.64  
7.84  
8.10  
8.25  
8.35  
8.50  
8.71  
8.96  
9.11  
9.22  
9.37  
9.57  
9.83  
9.98  
10.09  
10.24  
10.44  
10.70  
10.85  
10.96  
11.11  
11.31  
11.57  
461 ¹⁄₂  
465 ¹⁄₂  
471 ¹⁄₂  
479 ¹⁄₂  
489 ¹⁄₂  
495 ¹⁄₂  
499 ³⁄₄  
505 ³⁄₄  
513 ¹⁄₂  
523 ³⁄₄  
529 ³⁄₄  
534  
38 5 ¹⁄₂  
38 9 ¹⁄₂  
39 3 ¹⁄₂  
39 11 ¹⁄₂  
40 9 ¹⁄₂  
41 3 ¹⁄₂  
41 7 ³⁄₄  
42 1 ³⁄₄  
42 9 ¹⁄₂  
43 7 ³⁄₄  
44 1 ³⁄₄  
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
13  
13  
13  
14  
14  
14  
14  
14  
15  
15  
15  
15  
15  
16  
16  
16  
16  
16  
17  
17  
17  
17  
17  
18  
18  
18  
18  
18  
19  
19  
19  
19  
19  
20  
20  
20  
20  
20  
21  
21  
21  
21  
21  
22  
22  
22  
22  
22  
23  
23  
23  
23  
23  
24  
24  
24  
24  
24  
25  
25  
25  
25  
25  
26  
26  
26  
26  
26  
27  
11722  
11824  
11976  
12179  
12433  
12586  
12694  
12846  
13043  
13303  
13456  
13564  
13716  
13913  
14173  
14326  
14434  
14586  
14783  
15043  
15196  
15297  
15450  
15653  
15907  
16059  
16167  
16320  
16516  
16777  
16929  
17037  
17189  
17386  
17647  
17799  
17907  
18059  
18256  
18517  
18669  
18771  
18923  
19126  
19380  
19533  
19641  
19793  
19990  
20250  
20403  
20511  
20663  
20860  
21120  
21273  
21380  
21533  
21730  
21990  
22142  
22244  
22396  
22600  
22854  
23006  
23114  
23266  
23470  
11.72  
11.82  
11.98  
12.18  
12.43  
12.59  
12.69  
12.85  
13.04  
13.30  
13.46  
13.56  
13.71  
13.91  
14.17  
14.33  
14.43  
14.59  
14.78  
15.04  
15.20  
15.30  
15.45  
15.65  
15.91  
16.06  
16.17  
16.32  
16.52  
16.78  
16.93  
17.04  
17.19  
17.39  
17.65  
17.80  
17.91  
18.06  
18.26  
18.52  
18.67  
18.77  
18.92  
19.13  
19.38  
19.53  
19.64  
19.79  
19.99  
20.25  
20.40  
20.51  
20.66  
20.86  
21.12  
21.27  
21.38  
21.53  
21.73  
21.99  
22.14  
22.24  
22.40  
22.60  
22.85  
23.01  
23.11  
23.27  
23.47  
37 ¹⁄₄  
43 ¹⁄₄  
51 ¹⁄₄  
55 ¹⁄₄  
61 ¹⁄₄  
67 ¹⁄₄  
69 ¹⁄₄  
79 ¹⁄₄  
85 ¹⁄₄  
89 ¹⁄₂  
95 ¹⁄₂  
103 ¹⁄₄  
113 ¹⁄₂  
119 ¹⁄₂  
123 ³⁄₄  
129 ³⁄₄  
137 ¹⁄₂  
147 ³⁄₄  
153 ³⁄₄  
158  
164  
171 ³⁄₄  
182  
188  
192  
198  
206  
215 ³⁄₄  
222  
226 ¹⁄₄  
232 ¹⁄₄  
240  
250 ¹⁄₄  
256 ¹⁄₄  
260 ¹⁄₂  
266 ¹⁄₂  
274 ¹⁄₄  
284 ¹⁄₂  
290 ¹⁄₂  
294 ³⁄₄  
300 ³⁄₄  
308 ¹⁄₂  
318 ³⁄₄  
324 ³⁄₄  
328 ³⁄₄  
334 ³⁄₄  
342 ³⁄₄  
352 ³⁄₄  
358 ³⁄₄  
363  
1099  
1302  
1403  
1556  
1708  
1759  
2013  
2165  
2273  
2426  
2622  
2883  
3035  
3143  
3296  
3493  
3753  
3905  
4013  
4166  
4362  
4623  
4775  
4877  
5029  
5232  
5480  
5639  
5747  
5899  
6096  
6356  
6509  
6617  
6769  
6966  
7226  
7379  
7487  
7639  
7836  
8096  
8249  
8350  
8503  
8706  
8960  
9112  
9220  
9373  
9569  
9829  
9982  
10090  
10243  
10439  
10700  
10852  
10960  
11113  
11309  
11570  
44  
45  
6
0
540  
547 ³⁄₄  
558  
45 7 ³⁄₄  
46  
47  
6
0
564  
568 ¹⁄₄  
574 ¹⁄₄  
582  
47 4 ¹⁄₄  
47 10 ¹⁄₄  
48  
6
592 ¹⁄₄  
598 ¹⁄₄  
602 ¹⁄₄  
608 ¹⁄₄  
616 ¹⁄₄  
626 ¹⁄₄  
632 ¹⁄₄  
636 ¹⁄₂  
642 ¹⁄₂  
650 ¹⁄₄  
660 ¹⁄₂  
666 ¹⁄₂  
670 ³⁄₄  
676 ³⁄₄  
684 ¹⁄₂  
694 ³⁄₄  
700 ³⁄₄  
705  
711  
718 ³⁄₄  
729  
735  
739  
745  
753  
763  
769  
49 4 ¹⁄₄  
49 10 ¹⁄₄  
50 2 ¹⁄₄  
50 8 ¹⁄₄  
51 4 ¹⁄₄  
52 2 ¹⁄₄  
52 8 ¹⁄₄  
53 0 ¹⁄₂  
53 6 ¹⁄₂  
54 2 ¹⁄₂  
55 0 ¹⁄₂  
55 6 ¹⁄₂  
55 10 ³⁄₄  
56 4 ³⁄₄  
57 0 ¹⁄₂  
57 10 ³⁄₄  
58 4 ³⁄₄  
10 3 ³⁄₄  
10 9 ³⁄₄  
11 5 ¹⁄₂  
12 3 ³⁄₄  
12 9 ³⁄₄  
13  
13  
2
8
14 3 ³⁄₄  
15  
15  
16  
16  
17  
2
8
0
6
2
17 11 ³⁄₄  
18  
18 10 ¹⁄₄  
19 4 ¹⁄₄  
20  
6
58  
59  
9
3
0
20 10 ¹⁄₄  
21 4 ¹⁄₄  
21 8 ¹⁄₂  
22 2 ¹⁄₂  
22 10 ¹⁄₄  
23 8 ¹⁄₂  
24 2 ¹⁄₂  
24 6 ³⁄₄  
25 0 ³⁄₄  
25 8 ¹⁄₂  
26 8 ³⁄₄  
27 0 ³⁄₄  
27 4 ³⁄₄  
27 10 ³⁄₄  
28 6 ³⁄₄  
29 4 ³⁄₄  
29 10 ³⁄₄  
59 10 ³⁄₄  
60  
61  
61  
62  
62  
63  
64  
9
3
7
1
9
7
1
773 ¹⁄₄  
779 ¹⁄₄  
787  
64 5 ¹⁄₄  
64 11 ¹⁄₄  
9
9
9
9
65  
7
797 ¹⁄₄  
803 ¹⁄₄  
807 ¹⁄₂  
813 ¹⁄₂  
821 ¹⁄₄  
831 ¹⁄₂  
837 ¹⁄₂  
841 ³⁄₄  
847 ³⁄₄  
855 ¹⁄₂  
865 ³⁄₄  
871 ³⁄₄  
875 ³⁄₄  
881 ³⁄₄  
889 ³⁄₄  
899 ³⁄₄  
905 ³⁄₄  
910  
66 5 ¹⁄₄  
66 11 ¹⁄₄  
67 3 ¹⁄₂  
67 9 ¹⁄₂  
68 5 ¹⁄₄  
69 3 ¹⁄₂  
69 9 ¹⁄₂  
70 1 ³⁄₄  
70 7 ³⁄₄  
71 3 ¹⁄₂  
72 1 ³⁄₄  
72 6 ³⁄₄  
72 11 ³⁄₄  
73 5 ³⁄₄  
74 1 ³⁄₄  
74 11 ³⁄₄  
75 5 ³⁄₄  
75 10  
10  
10  
10  
10  
10  
11  
11  
11  
11  
11  
12  
12  
12  
12  
12  
13  
13  
30  
30  
3
9
369  
376 ³⁄₄  
387  
31 4 ³⁄₄  
32  
32  
33 1 ¹⁄₄  
33 7 ¹⁄₄  
3
9
393  
397 ¹⁄₄  
403 ¹⁄₄  
411  
421 ¹⁄₄  
427 ¹⁄₄  
431 ¹⁄₂  
437 ¹⁄₂  
445 ¹⁄₄  
455 ¹⁄₂  
34  
3
35 1 ¹⁄₄  
35 7 ¹⁄₄  
35 11 ¹⁄₂  
36 5 ¹⁄₂  
37 1 ¹⁄₄  
37 11 ¹⁄₂  
916  
924  
76  
77  
4
0
12  
 
FTF13 OFFSET ELEVATION CHART  
A2  
A
B
FTF13-ES30  
Offset/Return FTF13-S4  
Number of FTF13  
Chimney Sections  
A
B
Offset  
Height  
Offset  
Height  
(Inches) (Inches)  
Elbow Set  
Stabilizer  
12"  
18"  
36"  
(mm)  
(mm)  
C2  
B2  
4
9
12  
14 ¹⁄₄  
17 ¹⁄₄  
20 ¹⁄₄  
21  
15 ³⁄₄  
24 ¹⁄₂  
29 ³⁄₄  
33 ¹⁄₂  
38 ¹⁄₂  
43 ³⁄₄  
45 ¹⁄₄  
47 ¹⁄₂  
52 ¹⁄₂  
54 ¹⁄₄  
57 ³⁄₄  
59 ¹⁄₄  
63  
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
0
1
0
2
1
0
0
2
1
1
0
0
2
4
1
3
0
0
2
1
1
3
0
0
2
1
1
0
0
2
1
1
0
2
1
1
0
2
1
3
0
1
0
0
1
0
1
2
0
1
2
0
3
1
0
1
1
0
2
0
1
4
0
1
3
1
0
5
1
2
0
1
2
0
1
0
3
1
2
1
0
1
1
1
0
0
0
0
0
0
1
0
0
1
0
1
1
0
1
1
1
2
1
0
2
1
1
2
2
0
2
2
3
2
2
3
3
3
2
3
3
3
4
3
4
4
102  
229  
305  
362  
438  
514  
533  
565  
641  
667  
718  
743  
794  
826  
870  
921  
946  
400  
622  
756  
851  
978  
A1  
1111  
B1  
1149  
1207  
1334  
1378  
1467  
1505  
1600  
1651  
1734  
1822  
1861  
1905  
1956  
2045  
2127  
2178  
2223  
2261  
2324  
2400  
2483  
2616  
2654  
2705  
2838  
2946  
3080  
3169  
3245  
3302  
3435  
3524  
3696  
3747  
3829  
4051  
C1  
22 ¹⁄₄  
25 ¹⁄₄  
26 ¹⁄₄  
28 ¹⁄₄  
29 ¹⁄₄  
31 ¹⁄₄  
32 ¹⁄₂  
34 ¹⁄₄  
36 ¹⁄₄  
37 ¹⁄₄  
38 ¹⁄₄  
39 ¹⁄₄  
41 ¹⁄₂  
43 ¹⁄₄  
44 ¹⁄₂  
45 ¹⁄₄  
46 ¹⁄₄  
48 ¹⁄₄  
49 ¹⁄₂  
51 ¹⁄₄  
54 ¹⁄₄  
55 ¹⁄₄  
56 ¹⁄₂  
59 ¹⁄₂  
61 ³⁄₄  
64 ³⁄₄  
67  
65  
68 ¹⁄₄  
71 ³⁄₄  
73 ¹⁄₄  
75  
A2  
972  
997  
77  
C2  
80 ¹⁄₂  
83 ³⁄₄  
85 ³⁄₄  
87 ¹⁄₂  
89  
91 ¹⁄₂  
94 ¹⁄₂  
97 ³⁄₄  
1054  
1099  
1130  
1149  
1175  
1226  
1257  
1302  
1378  
1403  
1435  
1511  
1568  
1645  
1702  
1753  
1778  
1854  
1905  
2007  
2038  
2083  
2210  
B2  
A1  
B1  
C1  
103  
104 ¹⁄₂  
106 ¹⁄₂  
111 ³⁄₄  
116  
121 ¹⁄₄  
124 ³⁄₄  
127 ³⁄₄  
130  
69  
70  
73  
75  
79  
80 ¹⁄₄  
82  
135 ¹⁄₄  
138 ³⁄₄  
145 ¹⁄₂  
147 ¹⁄₂  
150 ³⁄₄  
159 ¹⁄₂  
Figure 36  
87  
Joints  
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.  
INSTALLING OFFSETS  
Chimney  
Section  
4'  
First, review the Offset Elevation Chart and see  
Figure 39 for reference.  
y Joint Past 6'  
Screws Required At  
Ever  
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.  
No. 8 x 1/2" SMS  
Step2.ProceedbyusingtheStraightUpInstal-  
lation Instructions for cutting and framing ceil-  
ing and roof openings.  
6'  
No Screws Required In  
Joints For First 6' of Offset  
Figure 37  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
13  
 
AIR INLET  
EYEBROW  
ASSEMBLY  
Step3. Centerouter-lockingsectionoverouter  
chimney pipe. Push down until locking joint  
has 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 40 ).  
Underside Of Chimney  
Figure 38  
FOAK  
FTF13-E30 Return Elbow*  
Chimney Section (S)  
Return  
Elbow  
Figure 41  
Step 3. The air inlet for the outside air kit is  
located on the right hand side of the fireplace  
(Figure 42 ). Refer to the installation instruc-  
tions packed with each FOAK-4 air kit for  
specific installation information. The outside  
air kit, if used, must be installed before the  
fireplace is totally framed and enclosed within  
the finished walls.  
B
FTF13-30 Offset Elbow*  
Figure 40  
A
Note: The return elbow assembly performs  
the same function as a stabilizer. Consider this  
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.  
OPEN  
Combustion Air Kits  
*Part of Offset/Return Package Model FTF13-ES30  
Figure 39  
The installation of an outside combustion air  
kit is highly recommended. It is very impor-  
tant to ensure good fireplace operation in  
homes which are tightly weather sealed or  
have ventilating appliances installed.  
Note: See Framing and Dimension Chart for  
the sizes of the ceiling and roof openings. The  
size of the roof opening varies with the degree  
of pitch of the roof.  
CLOSED  
Step 1. Determine the source for outside air,  
which can be installed through an outside wall  
or into a ventilated crawl space. In either case,  
a 4 1/2" diameter hole will be required for  
installation of the air inlet assembly.  
Offset Elbow Assembly  
Figure 42  
After completing the installation of the optional  
combustion air vent system, the actuator arm  
must be put in service and tested to ensure  
proper operation before completing any enclo-  
sure around the firebox. Failure to do so may  
result in extensive and costly rework.  
Offset elbows install the same as chimney  
sections. First, snap the inner section INTO the  
preceding inner section of flue. Check connec-  
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.  
CAUTION: AVOID INSTALLING THE AIR IN-  
LET WHERE THE OPENING COULD BE  
BLOCKED BY SNOW, BUSHES OR OTHER  
OBSTACLES. THE MAXIMUM HEIGHT FOR  
THE OUTSIDE AIR IS 50 FEET ABOVE THE  
HEARTH, PROVING THE AIR INLET IS TERMI-  
NATED A MINIMUM OF THREE (3) FEET BE-  
LOW THE CHIMNEY CAP LEVEL.  
To operate, locate the hand operated shut-off  
lever at the lower right side of the fireplace  
opening behind the screen. To open the air  
damper, turn upwards. To close, turn down.  
Return Elbow Assembly  
Return elbows install the same way as round  
terminations and stabilizers:  
Note: Combustion air inlet ducts must not  
terminate in attic space.  
Operate the actuator through several cycles.  
Ensuring proper operation and freedom of  
movement. Return the actuator arm to the  
closed position.  
Step 1. Hold return elbow over top of last  
chimney section.  
Step 2. Install the air inlet eyebrow (FOAK-4 or  
FOAK-4LD) through the wall opening (Figure 41).  
Push a 4 inch diameter NON-COMBUSTIBLE  
Class 0 or Class I flexible duct onto the eyebrow.  
Step 2. Center inner slip section into inner flue  
pipe-slip down.  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
14  
 
Surrounding materials must be caulked where  
it meets the black metal facing of the fireplace  
to avoid cold air intrusion. Use noncombus-  
tible caulking material only on fireplace facing  
to seal. Also, the outside air inlet duct should  
be wrapped with noncombustible insulation to  
minimize the formation of condensation. Do  
not place insulation materials on top of fire-  
place or against chimney sections.  
CAUTION: WHEN USING THE DECORATIVE  
GAS APPLIANCE, THE FIREPLACE DAMPER  
MUST BE SET IN THE FULLY OPEN POSITION.  
OPTIONAL EQUIPMENT  
CONSIDERATIONS  
Gas Line Connection  
CAUTION:PLUMBINGCONNECTIONSSHOULD  
ONLY BE PERFORMED BY A QUALIFIED, LI-  
CENSEDPLUMBER.MAINGASSUPPLYMUST  
BE OFF WHEN PLUMBING GAS LINE TO FIRE-  
PLACE OR PERFORMING SERVICE.  
The EST-48 has been listed to accept a ¹⁄₂" gas  
line for an approved gas appliance. Always  
have the appliance installed in accordance with  
all local building codes.  
Note: A 2" air space must be preserved for all  
combustible materials extending for any con-  
tinuous length adjacent to the chimney.  
If youre installing a gas line, connect it before  
the fireplace is framed and enclosed in the  
finished wall. The gas knockout is determined  
by the indentation located at the bottom and  
slightly off center in the side refractories. 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.  
CAUTION: ALL GAS CONNECTIONS SHOULD  
ONLY BE PERFORMED BY A QUALIFIED, LI-  
CENSED TRADESMAN. THE MAIN GAS SUP-  
PLY MUST BE OFF WHEN PLUMBING THE  
GAS LINE TO THE FIREPLACE OR WHEN PER-  
FORMING SERVICE WORK.  
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.  
Install a ¹⁄₂" gas supply line through fireplace  
wall for connection to a decorative gas appli-  
anceinsidethefirebox. Outside, thegassupply  
line connects to a gas shut-off valve recessed  
flush into the wall or floor. The valve should be  
controlled by a removable valve key for safety.  
FIREPLACE FINISHES  
Mantels and Trim  
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 4s (or heavier) lumber.  
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.  
IMPORTANT:REPACKINSULATIONMATERIAL  
IN SQUARE HOLE AROUND GAS LINE, INTE-  
RIORANDEXTERIOROFFIREPLACE,TOSEAL.  
Note: The header may rest on the two (2) metal  
top spacers on top of the unit but the header  
must not be notched to fit around the spacers.  
This provision is intended for connection to a  
decorative gas appliance incorporating an au-  
tomatic shut-off device and complying with the  
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.  
These fireplaces may sit directly on a combus-  
tible surface. A 2" air space is required be-  
tween combustible framing and the chimney.  
Combustible mantels and trim may be in-  
stalled 12" above the fireplace opening as per  
NFPA 211, Section 7-2.3.3. and Figure 43. If  
a mantel is of a noncombustible material, it is  
exempt from these requirements as long as it  
does not interfere with the installation or op-  
eration of glass doors.  
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  
these fireplaces may constitute a potential fire  
hazard and is not recommended.  
Vent Free Appliances  
CAUTION: CERTAIN GLASS DOORS OVER-  
LAPTHEBLACKMETALFACINGOFTHEFIRE-  
PLACE. IF THE FIREPLACE HAS BEEN 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.  
These units have been tested and approved to  
ANSI/IAS/AGA Z21.11.2 for use with unvented  
gas appliances and complies with the stan-  
dard for Factory-Built fireplaces, UL 127.  
Finished  
Wall  
Combustible  
Mantel and Trim  
Header  
Noncombustible  
The unit has been tested for use with any  
unvented gas log sets having a maximum  
rating of 40,000 BTU. The minimum mantle  
configurations are outlined in Figure 43.  
12" Max.  
Wall Covering  
Spacer  
1 ¹⁄₂"  
12"  
Min.  
These fireplaces have been marked with a  
maximum rating of 40,000 BTU to assure that  
homeowners do not exceed the allowable lim-  
its for all allowed installations of mantles.  
8 ⁹⁄₁₆"  
COLD CLIMATE INSULATION  
Fireplace  
Opening  
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.  
Typical Installation  
NEVER INSTALL AN UNVENTED GAS LOG  
SET WITH A BTU GREATER THAN 40,000.  
Figure 43  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
15  
 
Alternative Hearth Extension  
and Wall Shield Materials  
Hearth Extension Dimensions  
(For Figures 44 and 45 )  
Hearth Extensions and Wall Shields  
A hearth extension must be installed with all  
fireplaces. It is to protect the floor in front of the  
fireplacefrombothradiantheatandsparks. For  
Model EST-48, the hearth extension must ex-  
tend 12" beyond both sides and must extend  
20" beyond the front. Use a durable noncom-  
bustible material having an equal or greater  
insulating value of k = .84 BTU IN/FT2 HR °F  
or a thermal resistance that equals or exceed  
r = 1.19 HR °F FT2/BTU IN. A minimum 1" thick  
noncombustible material is all that is required  
over a noncombustible slab floor.  
Listed  
Values  
Min. Thick  
A
B
C
D
20"  
48"  
12"  
72"  
Material  
k
r
TL  
Millboard  
.84  
1.19  
1"  
Alternative  
Materials  
Values  
Min. Thick  
TM  
k
r
MethodsofDeterminingHearthExtension  
Equivalents  
Wonderboard  
Common brick  
1.92 0.56  
5.00 0.20  
2 ³⁄₈"  
6"  
To determine the thickness required for any  
desired material when either the k or r values  
are known:  
Cement mortar 5.00 0.20  
6"  
Note: Any noncombustible material whose 1" k  
value is less than .84 or whose r value is more  
than 1.19 is acceptable.  
Ceramic tile  
Marble  
12.5 0.08  
11.0 0.09  
0.43 2.33  
15"  
13"  
¹⁄₂"  
TM = thickness of desired material in inches  
kM = k value of desired material  
rM = r value of desired material  
Micore CV230  
(U.S. Gypsum)  
If the fireplace is installed on a combustible  
floor,themetalsafetystrips(provided)mustbe  
used on the floor extending half under the  
fireplace and half under the hearth extension.  
T1 = minimum listed thickness  
Ceraform 126  
(Johns-Manville)  
0.27 3.70  
¹⁄₂"  
Example: Micore CV230 is to be used with the  
EST-48 fireplace. How thick must this material  
be?  
Secure the hearth extension to the floor to  
prevent possible shifting.  
At times, it is important to know what combina-  
tions of materials are acceptable for use as  
hearth extension. The Rvalues are used to  
determine acceptable combinations of materi-  
als because Rvalues are additive where r and  
k values are not.  
Using the k formula:  
If the fireplace is installed diagonally across a  
90° corner, the 24" sidewall clearance can be  
reduced to 20" and no wall protection is re-  
quired.  
Desired  
k value of desired  
Required = material (per inch) x of listed  
Thickness k value of listed  
material (per inch)  
Min.Thickness  
material  
Rvalue = 1 = r x thickness of material  
k
Side Wall cannot be  
Closer than 24" under  
any Circumastances  
TM (inches) = kM x T1  
.84  
Example: Given that the required Rvalue for  
asuitablehearthextensionusedwiththeEST-48  
must be equal to or greater than R= r x T1 =  
1.19 x 1" = 1.19. It is desired to elevate a marble  
hearth extension to a level of 5or more off the  
floor surface. What combination of noncom-  
bustible materials can be used to accomplish  
this?  
TM (inches) = 0.43* x 1" **  
.84  
Answer using k = 0.51 x 1 = 0.51 = ¹⁄₂"  
C
Using the r formula:  
B
A
C
Desired  
k value of desired  
Min.Thickness  
If common brick is used so that the 3 ¹⁄₂"  
dimension is the height, then Rfor the com-  
mon brick becomes:  
Required = material (per inch) x of listed  
Thickness k value of listed  
material (per inch)  
Figure 44  
material  
RM = r x TM = 0.20 x 3 ¹⁄₂" = 0.70  
TM (inches) = 1.19 x T1  
rM  
Using ¹⁄₂" of mortar to set the brick, then Rfor  
the mortar becomes:  
TM (inches) = 1.19 x 1" **  
2.33*  
R= r x TM = 0.20 x ¹⁄₂" = 0.10  
Answer using r = 0.51 x 1" = 0.51 = ¹⁄₂"  
A ³⁄₄" marble slab set on ¹⁄₄" micore covers the  
brick, then Rfor the marble and micore  
becomes:  
C
C
B
D
A
* value taken from chart  
** minimum thickness per listing  
R= r x TM = 0.09 x ³⁄₄" = 0.068  
R= r x TM = 2.33 x ¹⁄₄" = 0.5825  
Figure 45  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
16  
 
The sum of all Rvalues is:  
Combustible materials may project beyond the  
sides of the fireplace opening as long as they  
are kept within the shaded areas illustrated in  
Figure 47.  
.70 + .10 + .068 + .5825 = 1.4505  
This would be an acceptable combination of  
materials for the hearth extension since the  
total calculated Rvalue of all material used  
exceed the required Rvalue of 1.19.  
Combustible  
Fireplace  
Materials Allowed  
in Shaded Areas  
3 ¹⁄₄"  
Firestop Spacer (30°)  
63L37  
F10FS30-2  
WARNING: THE CRACK BETWEEN THE  
FIREPLACE AND THE HEARTH EXTEN-  
SION MUST BE SEALED WITH A NON-  
COMBUSTIBLE MATERIAL.  
¹⁄₂"  
15°  
4 ³⁄₄"  
12" Min.  
Distance to  
Protected Side Wall  
WARNING: THE FIREPLACE MUST BE  
RAISED IF THE HEIGHT OF THE HEARTH  
EXTENSION EXCEEDS 8 ¹⁄₂" ABOVE THE  
BOTTOM OF THE FIREPLACE (FIGURE  
46 ).  
18" Min.  
Distance to  
Unprotected Side Wall  
Figure 47  
Offset/ Return  
INSTALLATION COMPONENTS  
Package (30°)  
63L24  
FTF13-ES30  
The following items are available for use in the  
installation of this appliance.  
8 ¹⁄₂" Max.  
Chase Termination  
(Square)  
Maximum Thickness of Hearth Extension  
when EST-48 is on the Floor  
63L54  
FTF13-CT2  
Figure 46  
FINISH TO YOUR TASTE  
Outside Combustion Air Kits  
(with duct)  
81L87  
81L88  
FOAK  
FOAK-LD  
(without duct)  
There are a wide variety of finished looksfor  
these fireplaces, from formal wall decor with  
elaborate mantels to rustic wood paneling or  
warm brick facings.  
Stabilizer  
63L27  
FTF13-S4  
Only noncombustible materials like stone, tile,  
brick, etc., may overlap the black front facing.  
Do not extend these materials beyond the black  
facing and into the firebox area. Be sure not to  
interfere with the installation and operation of  
glass doors or block the upper or lower grilles.  
Seal all joints between the black facing and wall  
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.  
Combination  
Offset/Return Elbow  
63L35  
FTF13-OR15  
Locking Band  
63L60  
FLB  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
17  
 
INSTALLATION COMPONENTS  
63L40  
63L41  
F10F6  
F10F12  
Round Termination  
63L44  
FTF13-CTD  
Flashing  
Firestop Spacer (Flat)  
63L36  
F10FS-2  
Chase Termination  
(Square)  
63L50  
FTF13-CT1  
63L19  
63L20  
63L21  
FTF13-12  
FTF13-18  
FTF13-36  
Storm Collar  
63L59  
FSC  
Chimney Section  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
18  
 
19  
 
LennoxHearthProductsreservestherighttomakechangesatanytime,withoutnotice,indesign,  
materials, specifications, prices and also to discontinue colors, styles and products.  
Consult your local distributor for fireplace code information.  
1110 West Taft Avenue  
Orange, CA 92865  
Printed in U.S.A. © 2001 by LENNOX HEARTH PRODUCTS  
P/N 850,006M REV. D 05/2005  
 

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