BFC
Balance Flue
(Closed Combustion)
Heat-Circulating Fireplace
Model:
BFC36
Homeowner’s Installation
and Operating Manual
For use in the U.S. / Canada
Underwriter’s Laboratories
Report No. MH6018
CFM Specialty Home Products
410 Admiral Blvd. • Mississauga, Ontario, Canada L5T 2N6 • 905-670-7777
DO NOT DISCARD THIS MANUAL: Retain for future use.
7412647 8/05 Rev. 10
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BFC36 Balance Flue Heat-Circulating Fireplace
BFC36 Balanced Flue Heat-Circulating Fireplace
������"
(624mm)
Rough
Opening
Depth
����"
(197mm)
13���" Dia.
(343mm)
11" Dia.
(179mm)
8" Dia.
51����" (1297mm)
��"
(610mm)
23"
���" (13mm)
(203mm)
���"
Recessed
Nailing
Flange
(584mm)
(16mm)
Rough Opening Width 43"
" (918mm)
�
�
(1092mm)
�
�
Rough
Opening
Height
�
" (16mm)
�
�
�
�����" (179mm)
" (1834mm)
�
�
���"
�
�
�
�
�����"
(902mm)
32���"
(829mm)
Gas Line
Access
35"
(889mm)
Gas Line
Access
39���"
(997mm)
��"
(533mm)
36"
(914mm)
��"
(279mm)
������"
(246mm)
��" (914mm)
41���" (1064mm)
������" (176mm)
�������"
(49mm)
Fig. 1 BFC36 specifications and framing.
Front Width Back Width
Depth
C
B
A
B
BFC36
32¹⁄₂"
20⁷⁄₁₆"
17³⁄₄"
(826 mm)
(519 mm)
(451 mm)
C
A
FP1531
Fig. 1a Hearth dimensions.
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BFC36 Balance Flue Heat-Circulating Fireplace
Termination Cap
Storm Collar
Pan Flashing
Batt Insulation
(Cut out around
firestop)
Draftstop
Firestop
Ceiling Level
Standoff
Trim Ledge
Standoff
Surround
Glass Door
Gas Line Ac-
cess Hole
(Each Side)
Romex Pigtail
Gas Line Access Knock-
out (Each Side)
Air Inlet
Basket Grate
Bottom Grille
Top Grille and Air Outlet
Metal Safety Strip(s)
Shown not inplace
(1,2 or 3 pieces)
Nailing Flange
FP554c
Fig. 2 Fireplace and chase parts identification.
4
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BFC36 Balance Flue Heat-Circulating Fireplace
Chimney Requirements - Offset Installations
OFFSET
CHIMNEY FLUE EXIT
RISE
Chimney
Section
IWF282
30°
Return
Elbow
Elbow
30˚ Elbow Offsets
B
G
A
1’
Offset
3”
8¹⁄₄"
3’ 4’
Rise
1¹⁄₂'
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
G
0
1
0
2
1
0
2
0
0
1
0
0
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
0
1
0
0
1
0
0
2
0
1
2
0
1
3
0
2
3
1
2
0
1
3
0
2
3
1
2
0
1
3
0
2
3
1
2
0
0
0
0
0
0
0
0
1
0
1
1
0
1
1
0
2
1
0
2
1
0
2
1
3
2
1
3
2
1
3
2
4
3
2
4
3
2
4
3
5
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
11”
20"
30°
Offset
Elbow
D
11¹⁄₄" 25¹⁄₄"
13¹⁄₂" 29¹⁄₄"
16¹⁄₂" 34¹⁄₄"
20¹⁄₄" 40³⁄₄"
21³⁄₄" 43¹⁄₂"
26¹⁄₄" 51¹⁄₄"
28¹⁄₂" 55¹⁄₄"
31¹⁄₂" 60¹⁄₄”
34¹⁄₂" 65¹⁄₂"
37¹⁄₂" 70³⁄₄"
41¹⁄₂" 77³⁄₄"
45" 83³⁄₄"
47¹⁄₄" 87¹⁄₂"
51"
53¹⁄₄"
56¹⁄₄" 103¹⁄₄"
59¹⁄₄" 108¹⁄₂"
62¹⁄₄" 113¹⁄₂"
64¹⁄₂" 117¹⁄₂"
68¹⁄₄"
70¹⁄₂"
74¹⁄₄" 134¹⁄₂"
78" 140³⁄₄"
81"
84" 151¹⁄₄"
87" 156¹⁄₂"
89¹⁄₄" 160¹⁄₄"
93" 166³⁄₄"
95¹⁄₄" 170³⁄₄"
99¹⁄₄" 177³⁄₄"
E
6 FT.
Rise
TCS8A
Support
C
30°
Return
Elbow
H
Offset
H
30°
Offset
Elbow
B
Hearth
Floor
Example 1
Notes: G + H cannot exceed 20 feet.
Example 2
Example 3
94"
98"
FP269
Air Space Clearances: = 2” Min. to Combustibles
Illustration Key
The following safety rules apply to
offset installations (letters correspond
with illustration above):
C. The chimney cannot be more than 30˚
(45˚ in Canada) from the vertical plane in
any installation*.
124"
128"
A. Height of the chimney is measured
from the hearth to the chimney exit.
D. The maximum length of the angled run
of the total chimney system is 20 feet. (G
plus H cannot exceed 20 feet.)
146"
BFC36
50’0”
E. A chimney support (Model TCS8A)
is required every 6 feet of angled run of
chimney. Chimney supports are required
for every 30 feet and 60 feet of vertical
chimney height above the hearth.
Maximum:
Minimum:
Without Elbows
With 2 Elbows*
With 4 Elbows*
14’6”
14’6”
21’0”
Determine the offset distance of your
chimney arrangement from the centerline
of the fireplace to the centerline of the
chimney where it is to pass through the
first ceiling.
2 101¹⁄₄" 181³⁄₄"
2 104¹⁄₄" 186¹⁄₄"
2 107¹⁄₄" 191¹⁄₂"
2 110¹⁄₄" 196³⁄₄"
114" 203¹⁄₄"
3 117³⁄₄" 209³⁄₄"
120" 213¹⁄₂"
3 123³⁄₄" 220"
B. Do not use more than 4 elbows per
chimney.
Attach the straps of the return (top)
elbow to a structural framing member.
3
The offset (first) elbow of any pair does
not have straps.
NOTE: This offset distance may not be
your full offset distance. See Examples 2
and 3.
3
Fig. 3 Chimney system requirements.
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BFC36 Balance Flue Heat-Circulating Fireplace
Planning Information
Preplanning an installation is very important to ensure
safety and to save time and money. An installer must
predetermine where a fireplace will be set and how the
chimney system will be run.
The Ten Foot Rule
Major U.S. building codes specify a minimum chimney
height above the roof top. The “Ten Foot Rule” is a fire
safety rule and not a draft rule. To ensure proper draft,
it is recommended that you always meet or exceed the
“Ten Foot Rule,” especially when installing a termination
on a high pitch roof. (Fig. 5)
Mounting the Fireplace
A fireplace may only be mounted on the following sur-
faces:
The key points of the “Ten Foot Rule” are:
1. A flat combustible surface.
2. A raised wooden platform.
1. If the horizontal distance from the chimney to the
peak of the roof is 10’ (3m) or less, the top of the
chimney must be at least 2’ (610mm) above the peak
of the roof, but never less than 3’ (914mm) in height
above the highest point where it passes through the
roof.
3. A concrete block or other solid object placed be-
neath each of the four (4) corners of the fireplace.
The fireplace must be spaced 1” (25mm) from a com-
bustible back wall and 1/2” (13mm) from a combustible
side wall or support. (Page 13, Fig. 17)
2. If a horizontal distance from the chimney to the peak
of the roof is more than 10’ (3m), a chimney height
reference point is established on the surface of the
roof a distance of 10’ (3m) from the chimney in a
horizontal plane. The top of the chimney must be
at least 2’ (610mm) above the reference point, but
never less than 3’ (914mm) in height above the high-
est point where it passes through the roof.
Planning the Chimney Run
TOTAL
LENGTH
INSTALLED
LENGTH
(L )
L
L
L
T
1
1
TRIPLE
WALL
(L )
T
1
11¹⁄₂
17¹⁄₂
35¹⁄₂
47¹⁄₂
"
"
"
"
81
10¹⁄₂
16¹⁄₂
34¹⁄₂
46¹⁄₂
"
"
"
"
818
83
0 To 10'
84
FP288a
2' Min.
0 To 10'
3'
Min.
Fig. 4 Installed lengths of chimney sections.
2' Min.
3'
Determine how the chimney will be run, length of run
and chimney components required to complete the
job. (Fig. 4) Never install a chimney below minimum
heights.
Min.
Reference
Point
AC246
In planning a chimney system, it is important to know:
1. The height of a chimney is measured from the
hearth to the exit point on the termination.
Fig. 5 Ten Foot Rule illustration.
2. A chimney cannot be offset more than 30° from a
vertical plane.
3. A chimney may run straight up or it may be neces-
sary to offset it to avoid obstructions.
4. The maximum length of an angled run (total chimney
system) is 20’ (6m).
5. No more than 2 offsets (4 total 30° elbows in U.S./or
2 total 45° elbows in Canada) per fireplace may be
used.
6. A guy wire stabilizer is required for chimneys extend-
ing more than 6’ (1.8m) above a roof line.
6
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BFC36 Balance Flue Heat-Circulating Fireplace
Chimney Supports
Installation
The chimney system is supported by the fireplace for
vertical chimney heights less than 30’ (9m) above the
hearth. Chimney supports are required if the vertical
height exceeds 30’ (9m). Locate chimney supports
at ceiling holes or other structural framing at 30’ (9m)
heights. Spacing between chimney supports must not
exceed 30’ (9m). Use Chimney Support Model TCS8A.
(NOTE: The TCS8A cannot be mounted directly to
the fireplace.) Support provided by elbow straps fulfills
the support requirement only if they are spaced as pre-
viously described. (A chimney support is 2¹⁄₂" (64mm)
long when installed.)
Insulating Fireplace Enclosure
for Cold Climates
If you live in a cold climate, it is not required but
highly recommended that you insulate fireplace
enclosure to eliminate cold air penetration as much
as possible.
Insulate base of fireplace with a noncombustible
insulation rated for a minimum of 300°F. Insulating
is very important for outside wall installations over
a concrete slab. If fireplace is installed on a platform,
insulation should be placed on top of the platform
before fireplace is set. (Fig. 7)
Angled chimney runs require a support every 6’ 1.8m)
in addition to the elbow straps. Chimney supports are
used for this function. (Fig. 6)
When a fireplace is installed in a chase or on a
outside wall, enclosure should be treated like any
outside wall in a home. Insulation should be installed
on the inside wall as well as the outside wall(s). In
a chase, it is also a good idea to install a firestop at
the first ceiling level above the fireplace and enclose
the chase with sheeting material. Insulation may
then be installed above sheeting material to assure
the space around the fireplace is totally protected.
(Fig. 2)
Chimney Sup-
port Strap
When installing the chimney, DO NOT caulk be-
tween outer pipe and firestop. It is vital that some air
be allowed to flow through this very thin gap.
CAUTION: When installing a fireplace in an insu-
lated enclosure, be sure all required air spaces
are maintained. (Page 13, Fig. 17)
TCS8A
FP284a
Fig. 6 Chimney support installation.
Chase Installation
A chase is a vertical box-like structure which encloses
the fireplace and/or chimney. Chases are typically built
on the outside of the house with fireplace opening cut
into the outer wall of a room. (Page 4, Fig. 2)
If you need help in determining fireplace location or how
the chimney system should be run, contact your Ver-
mont Castings, Majestic Products dealer for assistance.
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BFC36 Balance Flue Heat-Circulating Fireplace
NOTE: Check local building codes to determine if
junction box is required at the romex pigtail/house wire
connection Also check junction box and speed control
(SCVS) installation instructions.
Hard Flat
Surface
The Model FKSX-A blower assembly is preinstalled in
the BFC36.
Fireplace Electrical
Coverplate
Romex Pigtail
(Provided)
Wire Nuts
(Not pro-
vided)
Insulation
Black
Ground
Platform
White
House
Wiring
(120V
FPC555a
60Hz)
FP1062
Fig. 7 Insulating between platform and fireplace.
Fig. 8 Wiring diagram.
Framing
Framing can be constructed before or after the fireplace
is set in place, however, most installers build the frame
before setting the fireplace.
Chimney Set-up
Since you have already preplanned the chimney run,
you should know exactly how the installation is to
be accomplished — how much pipe is required, the
number of elbows, if any, and type of termination to be
used.
Frame fireplace with 2 x 4 lumber or heavier materi-
als. Refer to framing dimensions in Figure 1 for basic
fireplace specifications.
NOTE: Framing should be positioned to accommodate
wall covering and fireplace facing material.
CAUTION: REPORT TO YOUR DEALERS ANY
PARTS DAMAGED IN SHIPMENT, SPECIFICALLY
CHECK THE END CONNECTION OF CHIMNEY SEC-
TIONS AND ELBOWS.
Installing Electrical Wire
The fan requires 120VAC, 60 Hz power which may be
connected to the right side of the fireplace using the
romex pigtail provided with teh unit. This power must
be completed before the fireplace is secured and finish
material applied.
NOTE: The BFC36 fireplace must use CFM Corpora-
tion Model triple wall 8” chimney components only. The
installation procedure described in this manual applies
only to this system.
Straight-Up Chimney Installation
1. Attach the white wire from house power to the white
wire of the romex pigtail and secure with a wire nut.
To mark the centerline of the flue, put the fireplace
in final position and measure out from the wall: 8³⁄₄"
(222mm). Mark a spot on the ceiling directly above the
fireplace. Draw a line parallel to the back wall through
this mark. (Fig. 9)
2. Attach the black wire from the house power to the
black wire of the romex pigtail and secure with a
wire nut.
3. Attach the ground wire from house power to the
ground wire of the romex pigtail and secure with a
wire nut. (Fig. 8)
Using a plumb bob positioned directly over center point
of fireplace flue collar, mark the ceiling to establish the
chimney center point. (Fig. 9)
IMPORTANT: The wire nuts must be tight.
8
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BFC36 Balance Flue Heat-Circulating Fireplace
Ceiling Chimney Hole/
Possible Obstructions
Chimney Centerline
Actual Center-
point
The size of the hole in ceiling will vary with the angle at
which the chimney passes through ceiling.
Drive a nail up through ceiling at marked chimney cen-
ter point. Go to floor above and see where hole will be
cut. Check to see where existing ceiling joists and other
possible obstructions are located...i.e. wiring, plumbing
etc... If necessary, re-position chimney and/or fireplace
to avoid obstructions.
8���"
(222mm)
Cutting the Hole
Plumb Line
Cover fireplace collar opening and cut proper sized
chimney hole in chimney.
Plumb Bob
Framing the Ceiling Hole
Imaginary Center-
point
Frame the ceiling chimney hole as shown in Figure
10. It is good practice to use framing lumber that is the
same size as the ceiling joists; this is a requirement at
attic level.
Existing
Ceiling
Joists
17¹⁄₂”
(445mm)
17¹⁄₂”
(445mm)
Chimney
Hole
FPC556a
Fig. 9 Locate centerline of chimney with plumb line.
New
Framing
Members
Offset Installation
Ceiling
FP551b
In order to clear an obstruction, it may be necessary to
offset chimney from vertical. This is accomplished by
using elbows. Use the 30° Offset Elbow table on Page
5 to determine proper offset and parts required.
Fig. 10 Typical frame for ceiling chimney hole.
The following table gives firestop spacer model num-
bers:
Each offset requires two (2) elbows. The second elbow
is equipped with support straps. It is very important to
install the second elbow in each offset as close to the
ceiling or support as possible so that the elbow straps
can be secured to framing members to help support the
weight of the chimney.
Chimney Hole Size
Angle of Chimney
at Ceiling
Size of Chimney
8” Flue
Vertical
FS2A
17¹⁄₂” x 17¹⁄₂”
30°
FS6A
17⁷⁄₈” x 29⁵⁄₈”
Determine offset distance of your chimney arrangement
from centerline of fireplace to centerline of chimney
where it is to pass through ceiling.
(445 x 445mm) (454 x 753mm)
Fig. 11 Ceiling chimney hole sizes necessary for installing
firestop spacer.
Locate center point of the chimney on ceiling as though
a straight up chimney arrangement is to be used. Mea-
sure your offset dimension from straight up chimney
center point on ceiling.
The inside dimension of the frame must be the same
as the hole size selected from Figure 11 in order to
provide required the 2” (51mm) air space between the
outside diameter of the chimney and the edges of the
framed ceiling hole.
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BFC36 Balance Flue Heat-Circulating Fireplace
Positioning, Safety Strips,
Securing the Fireplace
Slide fireplace into position.
Lift the fireplace front slightly and slide the metal safety
strips under front bottom edge about 1¹⁄₂” (38mm), al-
lowing the remainder to extend in front of firebox. Over-
lap strips at least 1/2” (13mm) to provide a positive joint.
(Flat safety strips are packed with fireplace.) (Fig. 12)
Metal Safety Strips
(1,2 or 3 pcs.)
Safety strips are used to ensure that any combustible
materials in front of the fireplace are protected even
though a non-combustible hearth extension is required.
If fireplace is to be elevated above the floor, a “Z”
shaped metal safety strip must be fabricated and used
to protect combustible surfaces in front of the fireplace.
This “Z” shaped safety strip is not provided but must be
fabricated of metal with each horizontal leg at least 1¹⁄₂”
(38mm) wide and equal in length to the metals strips
provided with the fireplace.
“Z” Safety
Strip
Fire-
place
(not sup-
plied)
¹⁄₂” (13mm)
Min. Overlap
Plat-
form
Hearth Ext.
FP557b
1¹⁄₂”
(38mm)
NOTE: Safety strips are not required over non-com-
bustible floors where all supports at the base of the
fireplace are noncombustible.
Fig. 12 Safety strip installation.
Nail Top
Standoffs
Four (4) nailing flanges are supplied with the fireplace
(found on the fireplace hearth). To level the box and
secure it firmly in place, remove the nailing flanges from
the hearth and install at the sides of the fireplace as
shown in Figure 13.
Nail Side-
Nailing
Flanges
FPC549a
Fig. 13 Fasten fireplace in position.
10
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BFC36 Balance Flue Heat-Circulating Fireplace
Installing the
Chimney System
Pipe Section
Pipe
Rim
Start by attaching the first chimney section to the collar
on top of the fireplace.
Hem
Lance
Install the pipe as pictured in Figure 14. When you
get a good lock, you will hear the pipe clearly snap
together. Once sections are snap-locked in place, it is
extremely difficult to get them apart. Make sure the
pipe is firmly snapped and locked together as each
pipe section is mounted.
Pipe
Hem
When installing elbows, only outer pipe will snap-
lock. Middle pipes simply slide into position. Be sure
to always attach straps on upper elbow to a structural
framing member. (Fig. 15)
Continue installing the pipe as required until pipe is
installed up through the ceiling. At this point, you must
install a firestop spacer.
FPC558a
Fig. 14 Install pipe, listening for the snap-lock to fasten.
Installing the Firestop Spacer
in the Ceiling Hole
Support Structure
Elbow Strap
A firestop spacer is used to keep pipe spaced properly
and required for safety.
Nail the firestop spacer (at each corner) to the framing
members of the ceiling hole. NOTE: A firestop spacer
is not required at the roof.
Elbow Strap
(must be tight)
Ceiling
Hole Fram-
ing
Hole sizes listed in Figure 11 for angled firestop spac-
ers provide minimum required air space to chimney
pipe for ceiling thickness up to 8” (203mm). When
combined thickness of ceiling material, ceiling joists
and flooring material exceeds 8” (203mm), adjustments
must be made in framing to assure that minimum air
spaces to chimney are maintained.
Angled Strap
Angled Firestop
Chimney Support Strap
(must be tight)
FP270/271
Proper Firestop Spacer Installation
Figure 16 shows different installation procedures for
both an area that is an attic
Fig. 15 Attach straps to a structural framing member.
and an area that is not an
Ceiling Installation
attic.
Attic Installation
If the area above the ceil-
ing is not an attic, position
the firestop spacer with the
flange on the ceiling side
and the angled portion ex-
tending up into the hole.
Nails (4)
Joist
Firestop
Spacer
Firestop
Spacer
If the area above the ceiling
is an attic, position the fire-
stop spacer with the flange
on the top of the framed
hole and the angled portion
extending down into the
Joist
Nails (4)
FP593
hole.
Fig. 16 Installing firestop spacer.
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BFC36 Balance Flue Heat-Circulating Fireplace
Firestop spacers are not available for, nor are they
required on vertical walls.
Additional Ceilings
If you encounter additional ceilings, repeat same steps
required for first ceiling installation. See firestop illus-
tration in Page 11, Figure 16.
DO NOT put any sealant around the area where the
outer pipe slides through the firestop spacer. If you
seal this area, it may cause a fire hazard.
Penetrating the Roof
Canadian Requirements
for Insulation Shield
Run pipe to roofline. Since chimney system must be
vented to the out-of-doors, you must use an approved
CFM Corporation termination.
In Canada, an attic insulation shield is required to pre-
vent attic insulation from contacting the chimney sec-
tion. Framing dimensions for the chimney hole should
measure 17¹⁄₂” x 17¹⁄₂” (445 x 445mm). An attic shield
MUST be installed on top of attic joists (above the floor
level). (Fig. 17)
If a chase is used, refer to the installation manual pro-
vided with the termination cap.
Locate Chimney Centerpoint On Roof
Use same procedure detailed in locating center point of
the flue system.
Drive a nail up through roof at the center point. This will
determine center point on outside of the roof.
Attic Insula-
tion Shield
Cut and Frame Roof Hole
Nails
(4 required)
Size of roof hole varies with the type of chimney termi-
nation installed. Refer to installation instructions pro-
vided with CFM Corporation chimney termination to find
correct size of roof hole.
There must be a 1¹⁄₂” (38mm) air space between out-
ermost portion of chimney sections and any adjacent
combustible surfaces. (Combustible surfaces include
burnable materials such as: ceiling members, joists,
flooring, combustible insulation and roof structures.)
Attic Joist
Base Flanges
Ceiling
FP263
WARNING: Do not pack required air spaces with
insulation or other materials.
Fig. 17 Attic shield installation (Canadian requirement).
Continue Installing Pipe to Complete Run
Mark an outline of the roof hole around the center of the
point nail. NOTE: Hole dimensions given in the chim-
ney top installation instructions are horizontal dimen-
sions; therefore, the hole size must be marked on the
roof accordingly.
Continue attaching pipe sections to complete system
to next level always being careful that the pipe is firmly
snap-locked in place before proceeding to next pipe
section.
Cover the opening of the installed chimney so debris
cannot get into the system.
Chimney Supports
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 flash-
ing anchored to the frame must be able to withstand
heavy winds.
If chimney supports are required, they are installed the
same as elbows. Nail chimney support straps to ad-
jacent structural framing, as shown on Page 8, Figure
9. Bend straps as necessary and make sure they are
secure so they will support the weight of the chimney.
A chimney support is 2¹⁄₂" (64mm) long when installed.
Consider this dimension when determining how many
straight chimney sections are needed.
Install Remainder of Chimney Sections
Since you have already preplanned the height of your
termination according to the Ten Foot Rule, continue to
install pipe to the predetermined height.
NOTE: Chimney supports are generally used in long
runs in a chase installation.
Check the chimney top installation instructions for
details on how high above the roof top the chimney sec-
tions (all pipes) should extend.
12
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BFC36 Balance Flue Heat-Circulating Fireplace
Installing Top Housing
or Termination
Air Space Clearances
Follow the installation instructions provided with the
CFM Corporation chimney termination you have se-
lected.
Combustible framing material MUST NOT
penetrate AIR SPACE (shaded areas).
Installing Chimney in a Chase
2”
Refer to Page 4, Figure 2 for an illustration of a typical
chase installation.
Standoff
CAUTION: Treatment of firestop spacers and construc-
tion of chase may vary with type of building. These
instructions are not a substitute for local building codes.
You must check your local building codes to determine
specific requirements for your city or state. NOTE:
Other building materials may be required in addition to
firestop spacers.
¹⁄₂” air space to
sides
FRONT VIEW
SIDE VIEW
Finishing
Firestop
CAUTION: All joints between the finished wall and the
fireplace surround (top/sides) must be sealed with non-
combustible material to prevent cold air leakage into
the room. Only noncombustible material may be applied
to the facing of the fireplace surround. (Black painted
area) (Fig. 18)
Wall
Shield
1” Air
Space to
Back
¹⁄₂” Air
Space to
Sides
Finish Wall
Finish the wall with material of your choice. Do not
install a combustible mantel shelf less than 12”
(305mm) above the grille opening. Do not install a
mantel face plate less than 6” (159mm) from top of
grille opening. (Fig. 20) If a combustible material is
used below a flat mantel shelf, consult your local build-
ing codes for minimum clearance from top of fireplace
opening to bottom of mantel shelf.
0” Clearance to
Floor
Only noncom-
bustible material
may be applied as
facing to the black
fireplace surround.
Hearth Extension
All joints (top, bottom and sides) where wall or deco-
rative facing material meets fireplace surround must
be completely sealed with a noncombustible material.
(Figures 19 and 20)
FPC559a
Fig. 18 Minimum clearances to combustibles.
NOTE: No side wall protection is required for fireplaces
installed at 45° to two (2) side walls (corner installation).
7412647
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BFC36 Balance Flue Heat-Circulating Fireplace
Combustible
12"
Mantel Shelf
and Trim
(305mm)
Max.
Finished Wall
1¹⁄₂"
(38mm)
Stud
12" (305mm)
Standoff
Min.
6"
Noncombustible
Material
(159mm)
Min.
Circulating
Front
Fireplace Opening
Side View
¹⁄₂"
2 x 4 Stud
Finished Wall
Must be sealed with noncom-
bustible material
Fireplace
Front
FP531b
Fig. 19 Mantel clearance.
Face Plate
*
1¹⁄₂"
Ref.
**
Combustible materials are
permitted within a shaded area
shown in Figure 23 titled
* 12” from top of grille opening.
** 6” from top of grille opening.
Minimum Wall Clearances.
MA81
Fig. 20 Combustible mantel clearances.
14
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BFC36 Balance Flue Heat-Circulating Fireplace
Side Wall Protection
Hearth Installation
Adjacent combustible side walls that are within mini-
mum dimensions shown in Figure 24 of the fireplace
opening must be protected with CFM Corporation Wall
Shield Model SP40 or a specifically built wall shield
described in Figure 18.
A hearth extension is required to protect a combustible
floor in front of the fireplace. Refer to Figure 21 for mini-
mum dimensions and mounting detail.
Note: Hearth Extension must not cover the air inlet
opening of a fireplace.
The special wall shield design described in Figure 18 is
an alternate method of adding protection to side walls
and can be used in place of the SP40 with the same
wall clearances specified for the SP40. Rt must =1.85
minimum.
The hearth extension described in Figure 21 must be
a durable non-combustible material with a minimum
(total) Rt value of 1.09; refer to Figure 22 for examples.
The overall height (above a combustible floor), depth
and width must be as indicated, with the extension cen-
tered to the fireplace opening.
Examples of wall shield insulation:
1. Manville - CERAFORM 126, K=.27,
1/2 inches thick
The top of insulation must be covered with a non-com-
bustible decorative covering or a piece of .018” mini-
mum sheet metal, to protect hearth extension material.
(Fig. 21)
2. EH2416, K = .458,
1 inch thick required.
Secure the hearth extension to the floor to prevent
shifting, using trim molding or other similar means at
three (3) outer edges. Seal crack between the fireplace
hearth and hearth extension with a non-combustible
material. (Figs. 21 and 23)
Minimum Hearth Extension Dimensions
Minimum Wall Clearances
(for On-Site Construction)
WITH
Noncombustible
Surround Facing
WITHOUT
Noncombustible
Surround Facing
Shaded area
starts 1/2" from
away from edge
of unit
4"
G
G
4" Brick
(Example material)
H
J
Firebox
Opening
E
E
D
Seal cracks
between the
fireplace
and hearth
extension with
noncombustible
material
F**
May install
noncombustible
decorative
covering
OR .018" min.
sheet metal
A - Min. clearance
to combustible
perpendicular wall
C**
Side
Wall
Side
Wall
B - Min. clearance
to combustible
Fireplace
Hearth
perpendicular wall when
using noncombustible wall shield*
4" MIN.
Combustible material permitted within shaded area.
Noncombustible wall shield requires 1" EH2416
insulation (minimum R Value = 1.85) between decorative
noncombustible rigid covering and combustible wall.
Minimum height and width is 40" x 40".
Dimension/degree of angle will vary depending on thickness
of noncombustible surround facing.
*
Minimum
Insulation
Value "R"
Safety strips
must overlap
���" minimum
Combustible
Floor
**
A
B
C
D
E
F
G
H
J
BFC36
26”
12”
17°
25°
12”
8”
8”
18”
47¹⁄₄”
FP594b
660mm 305mm
3085mm 203mm 203mm 457mm 1200mm
Fig. 21 Combustible side wall protection and hearth extension dimensions.
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BFC36 Balance Flue Heat-Circulating Fireplace
WARNING: Hearth extension must be installed in
accordance with Figure 23 and must not cover the
bottom front opening of the circulating model.
Side View
Wall Covering
Noncombustible
Decorative Fac-
ing
Alternate noncombustible materials may be used pro-
viding the (total) thermal resistance (Rt value) of the al-
ternate material employed is greater than or equal to R
= 1.09 Thermal resistance (R) or thermal conductivity
(K), may be obtained from manufacturer of the material.
Factors are related by the formula K = 1/R. (Fig. 24)
2 x 4” Header
- Do not notch at
standoffs
Seal all cracks
between fireplace
surround and wall
materials with non-
combustible material.
T = given thickness
R = thermal resistance for a given thickness (T)
K = thermal conductivity
Noncombus-
tible Decorative
Covering
Non-combustible material with a lower R value may
be used, provided thickness of material is sufficiently
greater to maintain an equivalent (total) thermal resis-
tance (Rt).
Seal crack between
fireplace and hearth
extension with noncom-
bustible material
Hearth Exten-
sion Insulation
COMMON MATERIALS AND FACTORS
MINIMUM
THICKNESS
R
MATERIAL
K*
Safety Strips -
Must be overlapped 1/2”
minimum
EH2416
FP550
(CFM Corporation)
1.09 0.50 in.**
0.10 5.46 in.**
0.458
Fig. 23 Sealing gaps.
Common Brick
5.0
Finish Glass Doors
The fallaway handles are used to open and close the
front doors. The fallaway handles may be removed
after each use or may be left in place. CAUTION: If the
handles are left in place during operation, they may
become hot. (Fig. 24)
R Value is for 1/2 inch.
* Units of K = BTU/SQ FT/HR/˚F/IN
** Thickness of Listed Material
FP533ADD
Fig. 22 Hearth extension material factors.
Adjust door alignment by loosening the phillips head
screws which secure the door hinges to the door.
Adjusting one hinge while leaving the other tight will
serve to rotate the inner edge up or down. Adjusting
both hinges at the same time allows the door to adjust
side-to-side.
Example of Determining Hearth Extension
Equivalents
To determine the thickness required for any new mate-
rial:
NEW
required
thickness
K of new material (per inch)
= --------------------------------------- X of listed
K of listed material (per inch) material
thickness
Example for Common Brick
T (new) = 5.0/0.458 x 0.50 in. = 5.46 in. (new required
Steel Handle
thickness).
Fallaway
Handle
FP1584
Fig. 24 Insert fallaway handle into steel handle.
16
7412647
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BFC36 Balance Flue Heat-Circulating Fireplace
BTU input of a gas appliance installed in fireplace
should be rated less than 100,000 BTU/Hr.
Glass Door Operation
The BFC36 is intended for use only with the doors fully
closed. (Fig. 25)
Gas pipe installation is intended for connection to a
decorative gas appliance only when (1.) incorporating
an automatic shutoff device and (2.) complying with the
Standard for Decorative Gas Appliances for Installa-
tion in Vented Fireplaces (ANSI Z21.60) or CSA draft
requirements for Gas-Fired Log Lighters for Woodburn-
ing Fireplaces (Draft No. 4, August 1993).
Decorative gas appliance should be installed in accor-
dance with the National Fuel Gas Code, ANSI Z223.1/
NFPA 54 (latest edition).
CAUTION: When using decorative gas
appliance, flue damper must be set in fully
open position. Glass doors on the fireplace
must also be fully opened.
Correct
Wrong
KT108b
Fig. 25 Correct door position.
WARNING: Do not operate an unvented gas
log set in this fireplace with the chimney
removed.
Installing Line for Gas Logs
CFM Specialty Home Products fireplaces are designed
to accept a 1/2” (13mm) gas line for installation of an
approved gas appliance. (CFM Specialty Home Prod-
ucts manufactures a wide variety of gas logs for use in
CFM Specialty Home Products fireplaces.)
WARNING: When installing an unvented
gas log set, the model AH3244BK or
AH3244PB 4” adjustable hood must be
used.
Be sure to have the appliance installed in accordance
with building codes.
Hole in Outer Casing
Fireplace Top View
Gas connection may enter from either left or right side
of the fireplace.
Locate appropriate gas line in the outer casing of fire-
place and remove insulation from gas line tube. (Fig.
26)
1"
Min.
Supply
Line
Gas Line
Tube
From inside the fireplace, locate the knockout on the
firebrick -- be sure you are on the appropriate or “gas
line” side of the fireplace. Using a flat bladed screw-
driver or small chisel and hammer, carefully tap around
the knockout until it loosens and falls out.
Ceramic
Knockout
Repack Insu-
lation
1/2"
Hole in
Outer Cas-
ing
Install 1/2” (13mm) certified gas pipe through opening.
After gas pipe installation is complete, use insulation
that was removed from gas line tube to repack space
around the pipe. Material should be inserted from
outside of the fireplace and packed tightly to totally seal
between the pipe and tube.
Ceramic Knockout
(both sides)
FP560a
Note: Gas pipe should not come in contact with
any wood structures until it has reached a point at
least 1” (25mm) away from fireplace side.
Fig. 26 Gas line access.
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BFC36 Balance Flue Heat-Circulating Fireplace
3
1
25, 26
21, 22,
23
24
2
27
20
6
27
8
10
9
�
5
14
15
7
12
11
13
18
16
17
19
CFM Specialty Home Products reserves the right to make changes in design, materials, specifications, prices and discontinue colors and products
at any time, without notice.
BFC Balanced Flue Fireplace
Ref. Description
BFC36
3126160
3126160
7579218
20008275
20008276
2353145
2353146
2353140
2422198
7547137
2353147
2353163
7522241
7522239
20009567
20009694
3167900
2353179
3126161
5004245
5004025
20005980
1203161
5004265
1. Top Grille - Painted
2. Bottom Grille - Painted
3. Grate Assembly
4. Left Door Assembly (Complete)
5. Right Door Assembly (Complete)
6. Rear Firebrick
7. Side Firebrick (two per fireplace)
8. Hearth Firebrick
9. Nailing Flange (four per fireplace)
10. Fiberglas Rope Gasket (Outer Collar)
11. Top Refractory
12. Front Brick Retainer
13. Cable Clip (For Blower Assembly)
14. Plug Button (two per fireplace)
15. Door Gasket
16. Ceramic Glass Panel (two per fireplace)
17. Blower Assembly - FKSX-A
18. Grate Retainer
19. Junction Box Assembly
20. Front Handle w/Shaft 1/8” Nickel
21. Pawl Assy.
22. 3/8” Washer
23. Nut, Hex 3/8-16 Std.
24. Damper Steel Handle w/Screw
18
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BFC36 Balance Flue Heat-Circulating Fireplace
BFC Balanced Flue Fireplace (continued)
Ref. Description
BFC36
25. Stud 3/8-16 x 1⁵⁄₈”
26. Nut Hex Jam 3/8-16 Toplk
27. Black Fall Away Handle
20009776
1203290
20006382
7412647
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BFC36 Balance Flue Heat-Circulating Fireplace
Accessories
The following accessories for this appliance are available from your local Vermont Castings, Majestic Products
distributor. Should you need additional information beyond what your distributor can furnish, contact: CFM Specialty
Home Products, 410 Admiral Blvd., Mississauga, Ontario, Canada L5T 2N6, Attn: Technical Services.
CAUTION: This fireplace and chimney assembly is a highly engineered system, and, as such, must be oper-
ated only with CFM Specialty Home Products approved components. If you use an unapproved component
to make any modifications, you may create a possible fire hazard and will void the CFM Specialty Home
Products warranty. In addition, such action may void the coverage provided by the owner’s insurance.
Accessory
Description
Provides hearth extension floor protection
Holds firewood in firebox
Model Number
Hearth Extension Insulation
Grate for BR/BC36/42
Hearth Patch Compound
EH2416
RBG-BFC36
HPC-1
Patch cracks in hearth
See your Vermont Castings, Majestic Products
distributor or dealer for finishing Marble and
Mantels, available in a wide selection of styles.
20
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BFC36 Balance Flue Heat-Circulating Fireplace
Chimney Components
Component
Chimney Support
Description
Model Number
TCS8A
Used to support chimney for each of
30’ vertical height and 6’ of angled chimney run
Required at each floor level and attic on
multi-story installation
(8” flue)
Firestop
FS2A (8” straight flue)
FS6A (8” 30° inclined flue)
FS2100HT
T20B
(single flue)
TL20B
Attic Insulation Shield
Traditional Top Housing
Required in Canada
Top housing of simulated brick pattern
available in red, tan or white. Appropriate
adapter is required (8CA). Flashing included.
(extra tall single flue)
Housing Extension
Extends Traditional Top Housing on
steep pitched roofs
202036
(single flue)
Contemporary Chase Top
Termination
Used to terminate chimney at the top of a
chase. Flashing is not included.
TT200C
Adapter Kit (TT8CB) is required.
Chase Top Housing
Used with chase terminations to prevent rain entry.
FL88
(8” flue)
Contemporary Flashing
8-6-12 with 8” flue
0 to 6/12 pitch
8-12-12 with 8” flue
(6/12 to 12/12 pitch)
8” flue
Required for Contemporary Round Top
termination to prevent rain entry.
Chimney Sections
81 (1’ long)
Used to build chimney systems.
818 (1¹⁄₂’ long)
83 (3’ long)
84 (4’ long)
Chimney Elbows
Used to develop offset chimney systems.
Only 30° elbows are available. (Elbows
packed 2 per carton - upper and lower
elbow set.)
830A-2
(8” 30° flue)
Round Top Termination
Used to terminate chimney on the roof.
Flashing not included.
Used to terminate chimney at the top of a
chase. Adapter Kit included. Flashing not
included.
RT8C
(8” flue)
RT8CL
(8” flue)
Extended Round Top Chase
Termination
Adapter Kit
Adapter Kit
Required to connect triple-wall chimney
with Traditional Top Housing (T20B or TL20B)
Required to unite chimney with
Contemporary Chase Top. (TT200C)
8CA
(8” flue)
TT8CB
7412647
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BFC36 Balance Flue Heat-Circulating Fireplace
22
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LIMITED WARRANTY & 30 YEAR PROTECTION PLAN
For Vermont Castings, Majestic Products PRE-ENGINEERED Fireplace Systems
furnished with the Fireplace, and only if and so long as the Fireplace is
not removed from its original installation.
(2) This warranty is non-transferrable, and is made to the original
owner, provided that the purchase was made through an authorized
supplier of the Company.
(3) The sole and exclusive remedies for breach of any warranties here-
under shall be for the repair, replacement or provision of a replacement
part at CFM Specialty Home Products then current list price, FOB CFM
Specialty Home Products factory, for any defective part as specified in
paragraphs A through D.
CFM Specialty Home Products warrants its Pre-Engineered Fireplace
(“Fireplace”) and the CFM Specialty Home Products-supplied firegrate,
glass doors, outside air system, fan motor, and liners to be free from
defects in material or workmanship, as follows:
A. Fireplace and Chimney Components: (exclusive of CFM Specialty
Home Products-supplied firegrate, glass doors, outside air system, fan
motor, and liners all of which are covered by separate warranties under
paragraphs B through D below): At its option for a period of thirty (30)
years from the date the Fireplace is installed, CFM Specialty Home
Products either will;
(4)CFM Specialty Home Products shall not be liable for damage from
any smoking of a Vermont Castings, Majestic Products Pre-Engineered
Fireplace System related to environmental geographic conditions
(such as, for example, nearby structures or roof peaks, trees, hills,
or mountains), inadequate ventilation, or negative air pressure in the
place where the Fireplace system is installed, related to any mechanical
system (such as, for example, furnaces, fans, air conditioners, clothes
dryers, etc.)
(1) For a period of five (5) years from the date the Fireplace is installed,
CFM Specialty Home Products, at its option, will repair or replace any
defective part without charge.
(2) Thereafter, through the 10th year after the date the Fireplace is
installed, if replacement parts are available, CFM Specialty Home Prod-
ucts will provide a replacement for any defective part without charge for
the part itself. The consumer must pay for everything else other than
the part.
(5) Except as otherwise expressly specified in paragraphs A through
D, NONE OF THESE WARRANTIES COVER, AND CFM SPECIALTY
HOME PRODUCTS SHALL NOT BE RESPONSIBLE FOR, ANY CON-
STRUCTION, INSTALLATION, LABOR, TRANSPORTATION OR OTH-
ER COSTS OR EXPENSES ARISING FROM A DEFECTIVE PART, ITS
REPAIR OR REPLACEMENT OR OTHERWISE, NOR SHALL CFM
SPECIALTY HOME PRODUCTS IN ANY EVENT BE RESPONSIBLE
FOR ANY INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES
EXCEPT TO THE EXTENT REQUIRED BY LAW. Some states do not
allow the exclusion or limitation of incidental or consequential damages,
so this exclusion or limitation may not apply to you.
(3) Thereafter, through the 30th year after the date the Fireplace is
installed, if replacement parts are available, CFM Specialty Home Prod-
ucts will provide a replacement for any defective part at a cost to the
consumer of CFM Specialty Home Products then current list price, FOB
CFM Specialty Home Products factory.
B. Firegrate, Glass Doors, Outside Air System:
For a period of 90 days from the date the Fireplace is installed CFM
Specialty Home Products, at its option, will provide a replacement for
any defective part, without charge for the part itself, FOB CFM Specialty
Home Products factory, (The consumer must pay for everything else
other than the part,).
NO IMPLIED WARRANTIES, INCLUDING THE IMPLIED WARRAN-
TIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE, SHALL REMAIN IN EFFECT AFTER THE EXPIRATION OF
THE WARRANTIES SET FORTH IN PARAGRAPHS A THROUGH D.
Some states do not allow limitations on how long an implied warranty
lasts, so this limitation may not apply to you.
C. Fan Motor:
(1) For a period of one (1) year from the date the Fireplace is installed,
CFM Specialty Home Products, at its option, will repair or replace any
defective part without charge.
(2) Thereafter, through the 30th year after the date the Fireplace is
installed CFM Specialty Home Products, at its option, if replacement
parts are available, will provide a replacement for any defective part at a
cost to the consumer of CFM Specialty Home Products then current list
price, FOB CFM Specialty Home Products factory.
In order to obtain performance of any of the above warranty obligations
write to CFM Specialty Home Products at this address:
CFM Specialty Home Products
410 Admiral Blvd.
Mississauga, Ontario, Canada L5T 2N6
Attention: Director of Warranty Services
D. Liners (Refractory or Metal):
(1) For a period of two (2) years from the date the Fireplace is installed,
CFM Specialty Home Products, at its option, will repair or replace any
defective part without charge.
(2) Thereafter, through the 30th year after the date the Fireplace is
installed CFM Specialty Home Products, at its option, if replacement
parts are available, will provide a replacement for any defective part at a
cost to the consumer of CFM Specialty Home Products then current list
price, FOB CFM Specialty Home Products factory.
This warranty is subject to the following conditions and limitations:
(1) This warranty is extended only to a Fireplace installed in the con-
tinental United States, the state of Alaska and Canada; only if and so
long as the Fireplace is installed according to the installation instruc-
tions furnished with the Fireplace, and operated at all times under nor-
mal conditions, use and service according to the operative instructions
Since local building requirements may vary greatly throughout the
country, users of CFM Specialty Home Products products should
determine in advance whether there are any building code restrictions
on the use of a specific product. CFM SPECIALTY HOME PRODUCTS
MAKES NO REPRESENTATION OR WARRANTY REGARDING, AND
SHALL NOT BE RESPONSIBLE FOR, ANY BUILDING CODE COM-
PLIANCE.
The foregoing warranties give you specific legal rights and you may
also have other rights which vary from state to state.
7412647
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CFM Specialty Home Products
410 Admiral Blvd. • Mississauga, Ontario, Canada L5T 2N6 • 905-670-7777
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