Specifications

16
BFC36 Balanced Flue Heat-Circulating Fireplace
7412647
Side Wall Protection
Adjacent combustible side walls that are within mini-
mum dimensions shown in Figure 23 of the replace
opening must be protected with a specically built wall
shield as described in Figure 17.
The special wall shield design described in Figure 18 is
an alternate method of adding protection to side walls.
Rt must =1.09 minimum.
Examples of wall shield insulation:
1. Manville - CERAFORM 126, K=.27,
1/2 inches thick
2. EH2416, K = .458,
1 inch thick required.
Hearth Installation
A hearth extension is required to protect a combustible
oor in front of the replace. Refer to Figure 20 for mini-
mum dimensions and mounting detail.
Note: Hearth Extension must not cover the air inlet
opening of a replace.
The hearth extension described in Figure 20 must be
a durable non-combustible material with a minimum
(total) Rt value of 1.09; refer to Figure 21 for examples.
The overall height (above a combustible oor), depth
and width must be as indicated, with the extension cen-
tered to the replace opening.
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. 20)
Secure the hearth extension to the oor to prevent
shifting, using trim molding or other similar means at
three (3) outer edges. Seal crack between the replace
hearth and hearth extension with a non-combustible
material. (Figs. 20 and 22)
Minimum Wall Clearances
WITH
Noncombustible
Surround Facing
WITHOUT
Noncombustible
Surround Facing
Minimum Hearth Extension Dimensions
(for On-Site Construction)
G
H
G
J
Seal cracks
between the
fireplace
and hearth
extension with
noncombustible
material
Safety strips
must overlap
56O" minimum
May install
noncombustible
decorative
covering
OR .018" min.
sheet metal
Fireplace
Hearth
Combustible
Floor
1/2” Min.
EH2416 or
equal “R”
value
4" MIN.
FP594b
BFC combustible min.
8/21/00 djt
Firebox
Opening
A - Min. clearance
to combustible
perpendicular wall
B - Min. clearance
to combustible
perpendicular wall when
using noncombustible wall shield*
Side
Wall
Side
Wall
F**
C**
E
E
D
4" Brick
(Example material)
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.
Shaded area
starts 1/2" from
away from edge
of unit
4"
FP594b
Fig. 20 Combustible side wall protection and hearth extension dimensions.
A B C D E F G H J
BFC36 26” 12” 17° 25° 12” 8” 8” 18” 47Z\v”
660 mm 305 mm 305 mm 203 mm 203 mm 457 mm 1200 mm