Empire Comfort Systems BF28(B,C,G)M(N,P)-5 Installation Instructions Manual page 15

Determining Minimum Vent Height Above the Roof
WARNING
Major U.S. building codes specify minimum chimney and/or vent
height above the rooftop. These minimum heights are neces-
sary in the interest of safety. These specifications are summa-
rized in Figures 11 and 12.
Figure 11 - Venting for Existing Fireplace Installation
30259-6-0314
VENT EXAMPLES FOR SINGLE FLUE
Determining Minimum Vent Height Above the Roof
ROOF PITCH
Flat to 6/12
6/12 to 7/12
Over 7/12 to 8/12
Over 8/12 to 16/12
Over 16/12 to 21/12
Single Flue - Vertical Vent Run
with 45 degree elbows
H (Min.)
12" (305 mm)
15" (381 mm)
18" (457 mm)
24" (610 mm)
36" (914 mm)
Figure 12
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