Vermont Castings BC36MH Installation instructions

Manufactured Housing
Woodburning Fireplace
For Models:
BC36MH, BC42MH
DO NOT DISCARD THIS MANUAL: Retain for future use.
7412972 1/13 Rev. 17
Homeowner’s Installation &
Operating Manual
BC36MH
cover

BC36MH, BC42MH Woodburning Fireplace
27412972
Safety Information
Please Read This Manual Before Installing And Using Fireplace
IMPORTANT: Read all instructions and warnings carefully before starting installation. Failure to follow these instructions
may result in a possible re hazard and will void the warranty.
Description
The BCMH replace is a solid fuel, heat circulating wood-
burning replace engineered for use in manufactured
housing.
Precautions
Vermont Castings Group replaces and component parts
have been highly tested and will operate safely when
installed in accordance with instructions provided in this
manual. Carefully read and understand all instructions
before beginning installation.
If you notice any damage to replace or component parts,
immediately report damage to your Vermont Castings
Group dealer.
Only use Vermont Castings Group components or the war-
ranty will be voided and a re hazard may be created.
Vermont Castings Group warranty will be voided by and
Vermont Castings Group disclaims any responsibility for
the following actions:
• Installation of any damaged replace or chimney
component;
• Modication of replace, chimney assembly or
any component parts thereof; (except for chase
ashings as detailed in the Chimney Top installation
instructions).
• Installation other than as instructed by Vermont
Castings Group; or
• Installation and/or use of any component part not
manufactured or approved by Vermont Castings
Group in combination or assembly with a Vermont
Castings Group replace system, notwithstand-
ing any independent testing laboratory or other
third party approval of such component parts or
accessory.
Any such action may possibly cause a re hazard.
Consult local building codes to ensure that you are in
compliance before installing the replace.
Fireplaces must be vented to the out-of-doors.
Do not obstruct or modify air inlets/outlets in any
manner.
Do not install combustible materials on any of the black
replace surround.
Burn only solid wood fuel or gas logs.
Do not install a solid fuel burning insert or other
products not specied for use with this replace.
Drafts
A guide for home designers and installers:
To help prevent performance problems of this replace,
such as spillage of combustion products into the living
space, conditions should be avoided that cause negative
pressure in the surrounding area. The replace should not
be located in areas that can have negative drafts. These
can include small rooms with frequently swinging doors,
or the presence of large furnace intake return air registers
located close to the replace.
Gas Logs
If you plan to install a gas log, the gas line should be
installed before framing the replace. The gas line must
be installed by a certied gas line installer.
Table of Contents
Safety Information ......................................... 2
Specications and Framing ........................... 3
Parts Identication ......................................... 4
Planning Information ...................................... 5
Installation ..................................................... 7
Fan/Blower .................................................. 17
Replacement Parts ...................................... 19
Accessories ................................................. 21
Warranty ..................................................... 23
BC36MH / BC42MH
Listed
UL 127 / ULC-S610
Standard for Factory Built Fireplaces
Proposition 65 Warning: Fuels used in gas, wood-
burning or oil red appliances, and the products of
combustion of such fuels, contain chemicals known to
the State of California to cause cancer, birth defects
and other reproductive harm.
California Health & Safety Code Sec. 25249.6

BC36MH, BC42MH Woodburning Fireplace
3
7412972
Fig. 2 BC42MH Series specications and framing.
BC42MH Manufactured Housing Fireplace
42"
(1067mm)
346"
(880mm)
46" (1168mm)
6"
6" (16mm)
56O" (13mm)
56O"
6M"
(502mm)
56O" (64mm)
56O" (876mm)
56M"
(540mm)
6M"
(197mm)
Recessed
Nailing
Flange
FP545
BC42 SPECS
10/28/98
11" Dia.
(279mm)
Rough Opening Width 47"
Rough
Opening
Height
Rough
Opening
Depth
Gas Line
Access
49" (1245mm)
49" (1245mm)
56O" (1765mm)
6"
(187mm)
20"
(508mm)
56O"
(521mm)
" (711mm)
406M"
(1035mm)
6"
(372mm)
56M"
(337mm)
366"
(930mm)
3"
(76mm)
56O"
(241mm)
56O"
(191mm)
Outside
Air
Gas Line
Access
Electrical Access
*
(1194mm)
56M" (895mm)
8" Dia.
(203mm)
1156O”
(292mm)
*If elbows are offset to the back of the unit, chase depth will be 22⁵⁄₈" (575 mm).
BC36MH Manufactured Housing Fireplace
Fig. 1 BC36MH specications and framing.
* If elbows are offset to the back of the unit, chase depth will be 22⁵⁄₈” (575 mm).
56M"
(540mm)
972
BC36MH SPECS
36"
(914mm)
346"
(880mm)
40" (1016mm)
6M"
(502mm)
56O"
(64mm)
56O" (876mm) 6M"
(197 mm)
11" Dia.
Rough Opening Width 41"
Rough
Opening
Height
Rough
Opening
Depth
456M"
(1162mm)
456M"
(1162mm) 6M"
(1645mm)
6"
(187 mm)
20"
(508mm)
"
(559mm)
406M"
(1035mm)
6"
(372mm)
56M"
(337mm)
366"
(930mm)
956O"
(241mm)
56O"
(191mm)
1/2"(13mm)
56O"
(13mm)
Outside Air
Gas Line
Access
Gas Line
Access
56O"
(521mm)
*
(1041mm)
(279mm)
3"
(76mm)
Electrical Access
8" Dia.
(203mm)
6" (822mm)
1/2”
1/2”
1156O”
(292 mm)

BC36MH, BC42MH Woodburning Fireplace
47412972
CAUTION: The structural integrity of the wall and ceil-
ing/roof of a manufactured home must be maintained.
It is not recommended to cut roof trusses or any other
structural member of the home. Consult local codes on
how to preserve the structural integrity of a manufac-
tured home.
WARNING: Do not install in sleeping area.
A
B
C
FP1531
hearth dimensions
9/04 djt
Front Width Back Width Depth
A B C
BC36MH 33Z⁄v" 19⁵⁄₈" 15Z⁄v"
(845 mm) (499 mm) (387 mm)
BC42MH 39Z⁄v” 25⁵⁄₈” 15Z⁄v”
(997 mm) (651 mm) (387 mm)
Fig. 4 Hearth dimensions.
FP1531
972
parts id
BC36MH
6/11/99
BCMH Parts Identication
Outer Collar
Damper Control
Outlet Grille
Surround
Screen
Brick Sides and Back
Gas Line Access
(both sides)
Hearth
Air Inlet
Grate
Firebox
Metal Safety Strip(s)
Shown Not in Place
(1,2 or 3 pieces)
Electrical Access
Outside Air Ac-
cess Cover Plate
Gas Line Access
(both sides)
Surround
Facing Trim
Standoffs
(4 provided)
Damper
Flue Collar
Fig. 3 Parts of the BCMH replace.
Top Panel
Extension
Blower Switch
Glass Doors

BC36MH, BC42MH Woodburning Fireplace
5
7412972
Planning Information
L1
L1
LTMODEL SK
2 WALL CHIMNEY

TOTAL
LENGTH 
(LT)
INSTALLED
LENGTH 
(L1)
SK81
SK818
SK83
SK84
11Z⁄₂"
17Z⁄₂"
35Z⁄₂"
47Z⁄₂"
10Z⁄₂"
16Z⁄₂"
34Z⁄₂"
46Z⁄₂"
FP288
MBUF-INSTALLED LENGTH
6/17/96
Fig. 6 Installed lengths of chimney sections.
FP288
Required Items
The following parts are required for installation of the
BCMH in a mobile home:
TABLE 1
Radiant Shield/Firestop SKRSFMH*
Chimney Flashing 8-6-12*
Chimney Top RLTSK8*
Hearth Extension EH2416 or equal
Storm Collar DB-8A*
(2) 36” Chimney Sections SK83*
(2) 18” Chimney Sections SK818*
Collars & Duct Assembly Included with replace
BCMHCK is the standard Chimney Kit package that includes items
marked with *
Note: Refer to Accessory Section on Page 18 for optional Chimney
Package and optional Chimney Top.
NOTE: When these replaces are properly assembled
with the above listed venting accessories, the instal-
lation complies with HUD’s Manufactured Home Con-
struction and Safety Standards (3280.703, 3280.709g)
and Model Manufactured Home Installation Standards
(3285.505(f)).
Models BC36MH and BC42MH may also be installed
into a site-built or modular home when appropriate IRC,
IBC and/or local building codes are followed. In those
installations, neither an outside air kit nor the SKRS-
FMH Radiant Shield/Firestop may be required.
If you choose to install the MH model replace into a
site-built or modular home, any chimney components
available for conventional models BC36/42 may be
used.
The MH model replaces are supplied standard with
components that allow connection of a 6” outside fresh
air ex vent. If you choose to use these components to
install an outside air kit into a site-built or modular home
application, accessory termination kit Model AK6MH
may be used to complete the installation.
Preplanning an installation is very important to ensure
safety and to save time and money. An installer must
predetermine where a replace will be set and how the
chimney system will be run.
Mounting the Fireplace
A replace may only be mounted on the following sur-
faces:
• A at combustible surface
• A raised wooden platform
• A concrete block or other solid object placed be-
neath each of the four (4) corners
The replace must be spaced 1/2” (13 mm) from a
combustible back wall and 1/2” (13 mm) from a com-
bustible side wall or support. Refer to Specications,
Page 3, Figure 1 and Air space Data, Figure 14, to be
sure the location selected for the replace provides for
clearance and framing restrictions.
Planning the Chimney Run
Determine how the chimney will be run, length of run
and chimney components required to complete the job.
Never install a chimney below minimum heights.
Remember, the replace may not be installed in a bed-
room. It is not recommended to cut roof trusses. Con-
sult the local codes on how to preserve the structural
integrity of the mobile home oor, wall and ceiling/roof.
NOTE: The installed length of the chimney section is
less than its total length (except for the last section
installed), because of its overlap at joints. (Fig. 6)
In planning a chimney system, it is important to know:
• The height of a chimney is measured from the hearth
to the exit point on the termination.
• A guy wire stabilizer is required for chimneys extend-
ing more than 6’ (1.8 m) above a roof line.

BC36MH, BC42MH Woodburning Fireplace
67412972
Chimney Support
Chimney Requirements - Offset Installations
0 0 0 0 0 3" 11"
1 0 0 0 0 8Z⁄v" 20"
0 1 0 0 0 11Z⁄v" 25Z⁄v"
2 0 0 0 0 13Z⁄₂" 29Z⁄v"
1 1 0 0 0 16Z⁄₂" 34Z⁄v"
0 0 1 0 0 20Z⁄v" 40³⁄v"
2 1 0 0 0 21³⁄v" 43Z⁄₂"
0 0 0 1 0 26Z⁄v" 51Z⁄v"
0 1 1 0 0 28Z⁄₂" 55Z⁄v"
1 0 0 1 0 31Z⁄₂" 60Z⁄v”
0 1 0 1 0 34Z⁄₂" 65Z⁄₂"
0 0 2 0 0 37Z⁄₂" 70³⁄v"
1 1 0 1 1 41Z⁄₂" 77³⁄v"
0 0 1 1 1 45" 83³⁄v"
0 1 2 0 1 47Z⁄v" 87Z⁄₂"
0 0 0 2 1 51" 94"
0 1 1 1 1 53Z⁄v" 98"
0 0 3 0 1 56Z⁄v" 103Z⁄v"
0 1 0 2 1 59Z⁄v" 108Z⁄₂"
0 0 2 1 1 62Z⁄v" 113Z⁄₂"
0 1 3 0 1 64Z⁄₂" 117Z⁄₂"
0 0 1 2 1 68Z⁄v" 124"
0 1 2 1 1 70Z⁄₂" 128"
0 0 0 3 1 74Z⁄v" 134Z⁄₂"
0 1 1 2 2 78" 140³⁄v"
0 0 3 1 2 81" 146"
0 1 0 3 2 84" 151Z⁄v"
0 0 2 2 2 87" 156Z⁄₂"
0 1 3 1 2 89Z⁄v" 160Z⁄v"
0 0 1 3 2 93" 166³⁄v"
0 1 2 2 2 95Z⁄v" 170³⁄v"
0 0 0 4 2 99Z⁄v" 177³⁄v"
0 1 1 3 2 101Z⁄v" 181³⁄v"
0 0 3 2 2 104Z⁄v" 186Z⁄v"
0 1 0 4 2 107Z⁄v" 191Z⁄₂"
0 0 2 3 2 110Z⁄v" 196³⁄v"
0 1 3 2 3 114" 203Z⁄v"
0 0 1 4 3 117³⁄v" 209³⁄v"
0 1 2 3 3 120" 213Z⁄₂"
0 0 0 5 3 123³⁄v" 220"
30° Elbow Offsets
1' 1¹⁄₂'3' 4' Offset Rise
Notes: G + H cannot exceed 20 feet.
Air space clearances: SK8 (2-wall = 1Z⁄₂" and "S" Series (3-wall) = 2"
Illustration Key
The following safety rules apply to
offset installations (letters correspond
with illustration above):
A. Height of the chimney is measured
from the hearth to the chimney exit.
BC36MH BC42MH
Maximum: 90'0" 90'0"
Minimum:
Without Elbows 12' 6" 12' 6"
With 2 Elbows* 14' 6" 14' 6"
With 4 Elbows* 21' 0" 21' 0"
B. Do not use more than 4 elbows per
chimney.
Attach the straps of the return (top)
elbow to a structural framing member.
The offset (rst) elbow of any pair does
not have straps.
FP269
C. The chimney cannot be more than 30°
(45° in Canada) from the vertical plane in
any installation*.
D. The maximum length of the angled run
of the total chimney system is 20 feet. (G
plus H cannot exceed 20 feet.)
E. A chimney support (Model SKCS8)
is required every 6 feet of angled run of
chimney. Chimney supports are required
for every 30 feet and 60 feet (SK8 pipe)
or 20 feet and 40 feet (3-wall pipe) of ver-
tical chimney height above the hearth.
Determine the offset distance of your
chimney arrangement from the centerline
of the replace to the centerline of the
chimney where it is to pass through the
rst ceiling.
NOTE: This offset distance may not be
your full offset distance. See Examples 2
and 3.
FP282
MBUF
5/26/96
OFFSET
RISE
FP282
Fig. 5 Chimney system requirements.
D
RISE
BG
H
B
OFFSET
C
E
6 FT.
G
H
A
HEARTH
FLOOR
CHIMNEY
SECTION
CHIMNEY FLUE EXIT
ELBOW
FP269
MBUF
5/16/96
rev. 5/25
30˚
OFFSET
ELBOW
30˚
OFFSET
ELBOW
30˚
RETURN
ELBOW
30˚
RETURN
ELBOW
SKCS8
SUPPORT
Example 1 Example 2 Example 3

BC36MH, BC42MH Woodburning Fireplace
7
7412972
The Ten Foot Rule
Major U.S. building codes specify a minimum chimney
height above the roof top. The “Ten Foot Rule” is a re
safety rule and not a draft rule. It is recommended that
you always meet or exceed the “Ten Foot Rule”. (Fig.
7)
The key points of the “Ten Foot Rule” are:
1. If the horizontal distance from the chimney to the
peak of the roof is 10’ (3 m) or less, the top of the
chimney must be at least 2’ (610 mm) above the
peak of the roof, but never less than 3’ (914 mm)
in height above the highest point where it passes
through the roof.
2. If a horizontal distance from the chimney to the
peak of the roof is more than 10’ (3 m), a chimney
height reference point is established on the surface
of the roof a distance of 10’ (3 m) from the chimney
in a horizontal plane. The top of the chimney must
be at least 2’ (610 mm) above the reference point,
but never less than 3’ (914 mm) in height above the
highest point where it passes through the roof.
2' Min.
2' Min.
3'
Min.
0 To 10'
3'
Min.
0 To 10'
AC246
4/1/96

Reference
Point
Fig. 7 Ten Foot Rule illustration.
AC246
Installation
Install Electrical Connection
CAUTION: All wiring shall be done by a qualied
electrician and shall be in compliance with all local,
city and state building codes.
IMPORTANT: To prevent electrical shock, the power for
the home must be disabled. This can be accomplished
by positioning the circuit breaker to off.
The BCMH is equipped with a factory installed FK-12
fan and the EB1 junction box. The fan requires 120V
AC, 60Hz wiring to be run to the left side of the unit.
This should be completed before the replace is n-
ished.
NOTE: Check local building codes to determine if a
junction box is required at the romex pigtail/house wire
connection.
Chimney Setup
Since you have already preplanned the chimney run,
you should know exactly how the installation is to be ac-
complished - how much pipe is required and the type of
termination to be used.
CAUTION: Report to your dealer any parts damaged
in shipment, specically check the end connection
of chimney sections.
Straight-Up Chimney Installation
To mark the centerline of the ue, put the replace in
nal position and measure out from the wall 7⁷⁄₈” (200
mm). Mark a spot on the ceiling directly above the
replace. Draw a line parallel to the back wall through
this mark. (Fig. 8) Using a plumb bob positioned directly
over centerpoint of replace ue collar, mark the ceiling
to establish the chimney centerpoint. (Fig. 8)
Ceiling Chimney Hole
Drive a nail up through the ceiling at the marked chim-
ney centerpoint. Check where the hole will be cut for
ceiling joists and any other obstructions such as wiring
or plumbing runs. If necessary, reposition the chimney
and/or the replace to better accommodate these joists
and/or obstructions. Remember: it is not recommended
to cut roof trusses, as the structural integrity of the
mobile home oor, wall and ceiling/roof must be main-
tained.
Cutting the Hole
Cover replace collar opening and cut proper sized
chimney hole in ceiling. (Fig. 9)

BC36MH, BC42MH Woodburning Fireplace
87412972
FP556MH
BC36MH
LOCATE CENTER LINE
Circulating model
5/28/99 djt
Chimney Centerline
Actual Center-
point
7⁷⁄₈”
(200mm)
Plumb Line
Plumb Bob
Imaginary Cen-
terpoint
FP556MH
Fig. 8 Locate centerline of chimney with plumb line.
FP551A
Frame chimney hole
14"
5/13/99 djt
Existing Roof
Joists 14Z⁄₂”
(368mm)
14Z⁄₂”
(368mm)
Chimney Hole
New Framing Members
Ceiling
Fig. 9 Typical frame for ceiling chimney hole.
FP551A
Positioning, Safety Strips,
Securing The Fireplace
Slide replace into position.
Lift the replace front slightly and slide the metal safety
strips under front bottom edge about 1Z⁄₂” (38 mm),
allowing the remainder to extend in front of rebox.
Overlap strips at least 1/2” (13 mm) to provide a posi-
tive joint. (Flat safety strips are packed with replace)
(Fig. 10)
Safety strips are used to ensure that any combustible
materials in front of the replace are protected even
though a noncombustible hearth extension is required.
If replace is to be elevated above the oor, a “Z”
shaped metal safety strip must be fabricated and used
to protect combustible surfaces in front of the replace.
This “Z” shaped safety strip is not provided but must
be fabricated of metal with each horizontal leg at least
1Z⁄₂ inches wide and equal in length to the metal strips
provided with the replace.
NOTE: Safety strips are not required over noncombusti-
ble oors where all supports at the base of the replace
are noncombustible.
To prevent shifting of the replace, nail down straps and
nailing anges are supplied on the replace.
Secure replace to oor with four (4) nail down straps
located at the bottom of either side of the replace.
Secure the replace to the vertical framing studs using
the appropriate nailing anges on either side of the
replace front face. (Fig. 10)
FP557MH
BC36MH Safety strip installation
circulating models
5/28/99 djt
56O"
(38 mm)
Metal Safety Strips
(1, 2 or 3 pieces)
“Z” Safety
Strip
(not included)
Fire-
place
Hearth Ext.
Plat-
form
1/2” (13mm)
Min. Overlap
FP557MH
Fig. 10 Safety strip installation.
Nailing
Flanges
Nail
Down
Straps
Framing the Ceiling Hole
Frame the ceiling chimney hole as shown in Figure 9. It
is good practice to use framing lumber that is the same
size as the ceiling joists.
The inside dimension of the frame must be the same
as the hole size in order to provide the required 1Z⁄₂”
(38 mm) air space between the outside diameter of the
chimney and the edges of the framed ceiling hole.

BC36MH, BC42MH Woodburning Fireplace
9
7412972
Installing Outside Air System
It is necessary to install outside air in your mobile home
replace. Through this system, outside air is drawn into
the replace where it supplies the air for combustion.
The Outside Air Kit is shipped with the replace. A 48”
(1219 mm) exible duct section is provided with each
unit.
All Vermont Castings Group mobile home approved
replaces use 6” (159 mm) outside air duct systems.
Planning the Installation
Plan the location of the duct termination (purchased
separately) of the Outside Air System, and the path of
the interconnecting duct.
Duct run must be limited to a maximum distance of 20’
(3 m) from the replace pipe collar to duct termination.
This will provide the least restriction to air ow. No more
than two 90° elbows can be used. Duct run may be
horizontal, vertical inclined downward or upward, or any
combination of these. Upward vertical duct runs must
be limited in height to one (1) foot above the replace
before being run horizontally and terminated out-of-
doors. (Fig. 11)
The duct termination should be located so it is exposed
to an out-of-doors ventilation opening of at least 100
square inches. If the duct termination is located below
the mobile home, be sure the termination area has the
same size ventilation opening.
MH100
Duct install
mobile home
5/28/99 djt
Fireplace
Duct
Duct
Run
Floor
Duct Termination
Duct
Termination
Exterior
Wall
Fireplace
Duct
Run
Duct
MH100
Fig. 11 Typical duct installations.
The duct termination must be located so it does not
compete for air ow with exhaust fans, gas vent hoods
or other air consuming devices or appliances. It must
not be blocked by rafters, insulation materials, shrubs or
drifting snow.
CAUTION: Do not install termination into a garage
or other area that could contain ammable liquids
or fumes, or into an attic space.
Installation
Install the ex duct to connect the replace collar on left
side of replace and the termination. Be sure to fol-
low planning guidelines detailed above. Flexible duct,
straight smooth duct and elbows, or a combination of
the two may be used. Secure each duct joint with three
equally spaced sheet metal screws.
Use Class 1 duct material between pipe collar and duct
termination.
Secure the duct run using three sheet metal screws at
each joint. These screws are not provided.
Install the Termination
The outside air termination(s) should be supported in
a convenient manner and in a position where it cannot
become clogged with dirt or insulation.
Locate the centerpoint of the wall or oor and draw an
oversized circle exceeding the duct diameter for each
penetration. Cut the marked hole. Put a bead of caulk-
ing around the hole(s), install the termination and attach
with small screws or nails.
Installing the Chimney System
Start by attaching the rst chimney section to the collar
on top of the replace.
Install the pipe as pictured in Figure 12. When you get a
good lock, you will hear the pipe clearly snap together.
Once sections are snap-locked in place, it is extremely
difcult to get them apart. Make sure the pipe is rmly
snapped and locked together as each pipe section is
mounted.
Continue installing the pipe as required until pipe is
installed up to the ceiling/roof opening.
Penetrating the Roof
Run pipe to rooine. Since chimney system must be
vented to the out-of-doors, you must use an approved
Vermont Castings Group termination.
Locate Chimney Centerpoint On Roof
Use same procedure detailed in locating centerpoint
of the ue system. Drive nail up through roof at the
centerpoint. This will determine centerpoint on outside
of the roof.

BC36MH, BC42MH Woodburning Fireplace
10 7412972
Cut and Frame Roof Hole
This step must be completed while on the roof of the
mobile home. It is good practice to use plywood as
weight support while on the roof.
Cut a 14Z⁄₂” x 14Z⁄₂” (368 x 368 mm) hole in the roof.
There must be a 1Z⁄₂” (38 mm) air space between out-
ermost portion of chimney sections and any adjacent
combustible surfaces (Fig. 13) (Combustible surfaces
include burnable materials such as: ceiling members,
joists, ooring, combustible insulation and roof struc-
tures.)
WARNING: Do not pack required air spaces with
insulation or other materials.
Mark an outline of the roof hole around the centerpoint
of the nail. NOTE: Hole dimensions are horizontal
dimensions, therefore, the hole size must be marked on
the roof accordingly.
Cover the opening of the installed chimney so debris
cannot get into the system.
Cut and frame the hole. It is good practice to use fram-
ing lumber that is the same size as the rafters. Install
the frame securely because the chimney top and ash-
ing anchored to the frame must be able to withstand
heavy winds.
Before completing chimney run, you must now install
the Radiant Shield/Firestop.
Installing Radiant Shield/Firestop
CAUTION: The structural integrity of the oor, wall,
ceiling, roof trusses and any other structural mem-
bers must be maintained.
FP558MH
Pipe install
Circulating models
6/1/99 djt
Pipe Section
Pipe Rim
Pipe
Rim
Hem
Lance
FP558MH
Fig. 12 Install pipe, listening for the snap-lock to fasten.
FP559MH
BC36MH
AIR SPACES
circulating models
6/2/99 djt
Air space Clearances
Combustible framing material MUST NOT
penetrate AIR SPACE (shaded areas)
1Z⁄₂”
Standoff
Z⁄₂” Air Space
to Sides
Front View Side View
Radiant Shield/
Firestop
Z⁄₂” (13mm)
Air Space
to Back
Z⁄₂” (13mm)
Air Space
to Sides
Wall
Shield
0” Clearance
to Floor
Hearth Extension
Only noncombustible material
may be applied as facing to the
black replace surround.
FP559MH
Fig. 13 Minimum clearances to combustibles.
The radiant shield/restop is required for all manufac-
tured (mobile) home installations. The available radiant
shield/restop may be used for at or vaulted home ceil-
ings. It must extend through the attic and into the roof
ashing.
If the radiant shield/restop does not extend through the
attic and into the roof ashing, the TE thimble exten-
sion must be added to extend the shield into the roof
ashing. However, if the attic space is ventilated and
the replace system height from oor to the ue outlet
of the termination is 13’6” or more, it is not necessary to
extend the radiant shield into the roof ashing.
The radiant shield/restop is designed to eliminate the
need to cut trusses when installing the 8” (203 mm)
chimney between standard roof trusses fabricated on
16” (406 mm) centers. Locate and mark the center of