13
BDVT Series Direct Vent GaS Fireplace
10003358
3’
(914mm)
FP1237
Fig. 14 Maximum horizontal vent run.
•
The maximum number of 45
°
elbows permitted per
side wall installation is two (2). These elbows can be
installed in either the vertical or horizontal run.
•
For each 45
°
elbow installed in the horizontal run,
the length of the horizontal run MUST be reduced by
18” (457mm). This does not apply if the 45
°
elbows
are installed on the vertical part of the vent system.
•
The maximum number of elbow degrees in a system
is 270
°
. (Fig. 16)
7.5’
(2.3m)
A
B
A + B = 17’ (5.2m) Max.
1 x 90
°
elbow in horizontal plane = 3’ (914mm)
FP1238
Fig. 15 Maximum vent run with elbows.
1
2
3
4
Example:
Elbow 1 =
90
°
Elbow 2 =
45
°
Elbow 3 =
45
°
Elbow 4 =
90
°
Total angular variation = 270
°
1 + 2 + 3 + 4 = 270
°
FP1239
Fig. 16 Maximum number of elbow degrees.
STEP 1
Locate vent opening on the wall. It may be necessary
to first position the fireplace and measure to obtain
hole location. Depending on whether the wall is com-
bustible or noncombustible, cut opening to size. (Fig.
17)
For combustible walls first frame in opening.
Combustible Walls: (Fig. 17) Cut a 9
³⁄₈
”H x 9
³⁄₈
”W
(240 x 240mm) hole through the exterior wall and
frame as shown.
Noncombustible Walls: (Fig. 17) Hole opening must
be 7
¹⁄₂
” (190mm) in diameter.
Vertical Sidewall Installations
Vent Opening for Combustible Wall
9
³⁄₈
”
(240mm)
9
³⁄₈
”
(240mm)
Fireplace Hearth
Framing
Detail
Opening for Noncombustible Wall
7
¹⁄₂
”
(190mm)
VO584-100
Fig. 17 Locate vent opening on wall.
