NOTE:
a) for H & V values for 45
venting see Chart IV.
b) elbows are not counted in H
or V values.
c) vent chart starts from the top
of the unit.
Direct Vent Information (continued)
Natural Gas EP Unit ONLY
Horizontal Vents
Acceptable Configurations
Example 1
V Value = A (4') = 4'
H Value = 3B (3 x 2') + C (3') = 11'
V Value = Total length of all vertical
sections in feet.
H Value = Total length of all horizontal
sections in feet.
Page 24 of 80
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