VERTICAL VENTING CONFIGURATIONS
MAXIMUM VERTICAL RISE* AFTER FIRST ELBOW: 25 FT.
IMPORTANT:
Horizontal runs within a vertical termination reduces the maximum vertical
height allowed. Refer to the chart on page #5.
*Note: Maximum vertical rise includes the first elbow to vertically position the chimney.
Elbows: (1) included to vertically position the chimney. Each additional elbow reduces the maximum horizontal
run by 3 ft..
MINIMUM VENT SYSTEM CLEARANCES FOR VERTICAL TERMINATIONS:
1" ALL SIDES. Refer to vent
manufacturer’s installation manual for specific information.
WHEN VERTICALLY TERMINATING, THE MINIMUM CHIMNEY HEIGHT ABOVE THE ROOF LINE IS
DETERMINED BY THE FOLLOWING CHART:
Roof Pitch
Minimum Chimney Height
Roof Pitch
Minimum Chimney Height
Flat to 6/12
1 ft.
13/12 to 16/12
6 ft.
6/12 to 9/12
2 ft.
17/12 to 21/12
8 ft.
10/12 to 12/12
4 ft.
CAUTION:
This gas appliance must not be connected to or joined with any chimney flue serving any
other appliance.
MAX
25 FT.
MAX
25 FT.
1
"
CLEARANCE
25 Ft. Vertical Termination Requirements:
1 1/2
"
CLEARANCE AT TOP
FOR WALL PASS-THRU
3
"
SECTION MAX. HORIZONTAL RUN FOR 25 FT.
VERTICAL RISE
WALL THIMBLE
Page 8
3
"
CLEARANCE
90° Elbow at start to vertically position
the chimney.
Horizontal runs within a vertical
termination reduces the maximum vertical
height allowed.
FIGURE 4C
