GN National Electric BP)-1 Manual De Usuario
22618-4-1106
Page 22
VENT EXAMPLES FOR SINGLE FLUE (cont.)
FLEXIBLE
FLUE KIT
FLUE KIT
FLEXIBLE GAS
LINE
LINE
PVC PIPE SWV
(SUPPLIED BY INSTALLER)
(SUPPLIED BY INSTALLER)
(2) - 45 DEG. PVC BENDS
(SUPPLIED BY INSTALLER
IF NECCESSARY)
(SUPPLIED BY INSTALLER
IF NECCESSARY)
GALV. SHEET FLASHING
TO SEAL CHIMNEY
(SUPPLIED BY INSTALLER)
TO SEAL CHIMNEY
(SUPPLIED BY INSTALLER)
VENT CAP (SUPPLIED
WITH VENT KIT)
WITH VENT KIT)
H
12
X
ROOF PITCH
IS
IS
12
X
17’
5.2m
Figure 22
Venting for Existing Fireplace Installation
Determining Minimum Vent Height Above the Roof
WARNING: Major U.S. building codes specify minimum chim-
WARNING: Major U.S. building codes specify minimum chim-
ney and/or vent height above the rooftop. These minimum heights
are necessary in the interest of safety. These specifications are
summarized in Figure 22.
90° =
3’
V =
17’
Total =
20’
ROOF PITCH
H (Min.)
Flat to 6/12
12” (305mm)
6/12 to 7/12
15” (381mm)
Over 7/12 to 8/12
18” (457mm)
Over 8/12 to 16/12
24” (610mm)
Over 16/12 to 21/12 36” (914mm)