38142-2-0719
Page 13
Vent Size
Model BVD34FP series uses a 4" B-Vent for operation.
Models BVD36FP and BVP42FP series use a 6" B-Vent for
operation.
Never downsize venting diameters.
Clearances
Vent clearances are per vent manufacturer's specifications
Vent Configuration
Various venting configurations are shown in
Figures 14 and
15
from which maximum vent runs can be determined.
WARNING
Always maintain minimum clearances or greater
around the vent system. do not pack air spaces with
insulation or other material.
Vertical Venting - No Elbows
Figure 14
Offset Venting - With Elbows
Figure 15
Vent supports are per
vent manufacturer’s
specifications
Minimum clearances are
per vent manufacturer’s
specifications
40 ft. Max.
11 ft. Min.
90 - degree or
45 - degree Elbows
Straight Section
2 ft. Minimum off top of
unit before using elbows
Vent supports per
manufacturers vent
specifications
Horizontal vent
to maintain a 1/4”
rise per ft. Min.
11 ft. Min.
Maximum
horizontal
distance
is
50%
of
vertical
vent
height
5
f t .
M a x .
Horizontal at
11 ft.
Min.
Vertical
VENTING (CONT'd)
f i r e - p a r t s . c o m