Vent Examples For Single Flue - Empire Comfort Systems Mantis FF28BMN-1 Installation Instructions And Owner's Manual

VENT EXAMPLES FOR SINGLE FLUE (cont.)
Minimum Exterior Grade Dimension - Single Flue, Horizontal Venting Below Floor
WARNING: Major U.S. building codes specify minimum chimney and/or vent height above the rooftop. These minimum heights are
necessary in the interest of safety. These specifications are summarized in Figure 22.
25700-1-0809
90° ELBOW
1/4" DOWNWARD SLOPE
PER FOOT TO OUTSIDE
H
2 - 45 DEG. PVC
BENDS (SUPPLIED
BY INSTALLER)
MANTEL
SURROUND
Single Flue - Vertical Vent Run
with 45 degree elbows
6"
(15.2cm)
MIN.
FLUE CENTER
12" (30.5cm) MIN.
EXTERIOR GRADE
Figure 21
VENT CAP
(SUPPLIED WITH VENT KIT)
MODEL #PVVK-SV
FLASHING
ROOF PITCH
12
IS X
12
X
PVC PIPE
(SUPPLIED BY INSTALLER)
FLEXIBLE PVC PIPE
WITH 1/2" COUPLING ON EACH END
MODEL #PVVK-CFA
GAS SUPPLY
Figure 22
Determining Minimum Vent Height Above
the Roof
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)
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