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VENT EXAMPLES FOR SINGLE FLUE
Figure 11 - Venting for Existing Fireplace Installation
Determining Minimum Vent Height Above the Roof
Figure 12
Single Flue - Vertical Vent Run
with 45 degree elbows
ROOF PITCH
H (Min.)
Flat to 6/12
12” (305 mm)
6/12 to 7/12
15” (381 mm)
Over 7/12 to 8/12
18” (457 mm)
Over 8/12 to 16/12
24” (610 mm)
Over 16/12 to 21/12
36” (914 mm)
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.