Venting - Empire Comfort Systems MILLIVOLT 3 Series Installation Instructions And Owner's Manual

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.
Always maintain minimum clearances or greater
around the vent system. do not pack air spaces with
insulation or other material.
f i r e - p a r t s . c o m
40 ft. Max.
11 ft. Min.
Vertical Venting - No Elbows
Figure 14
38142-2-0719
VENTING (CONT'd)
WARNING
Minimum clearances are
per vent manufacturer's
specifications
Vent supports are per
vent manufacturer's
specifications
Maximum horizontal
distance is 50% of
vertical vent height
11 ft. Min.
90 - degree or
45 - degree Elbows
Straight Section
Offset Venting - With Elbows
Figure 15
5 ft. Max.
Horizontal at
11 ft. Min.
Vent supports per
Vertical
manufacturers vent
specifications
Horizontal vent
to maintain a 1/4"
rise per ft. Min.
2 ft. Minimum off top of
unit before using elbows
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