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Quadra-Fire • Expression 36 (QV36A-FB) • 2062-900 Rev. S • 11/1114
Note: Must have a 12 inch minimum
vertical vent before attaching a 90° elbow
to the unit.
H
1
V
1
Figure 5.3
Figure 5.4
D. Vent Diagrams
1. Top Vent - Horizontal Termination
One Elbow
Two Elbows
* If the horizontal component is less than
5 feet then the total vent run can be
extended to 40 feet.
INSTALLED
HORIZONTALLY
H
1
H
2
V
1
V
1
Minimum H
1
Maximum
1 ft. 305 mm 3 ft 924 mm
2-1/2 ft. 762 mm 6 ft 1.8 m
3-1/2 ft. 1.7 m 9 ft 2.7 m
4 ft. 1.2 m 10 ft 3.1 m
4-1/2 ft. 1.4 m 12 ft 3.7 m
5-1/2 ft. 1.7 m 15 ft 4.6 m
6-1/2 ft. 2 m 18 ft 5.5 m
7-1/2 ft. 2.3 m 21 ft 6.4 m
H
1
= 21 ft. (6.4 m) Maximum
V
1
= 40 ft. (12.2 m) Maximum
V
1
+ H
1
= 30 ft. (9.1 m) Maximum*
Fire Risk. Explosion Risk.
Do NOT pack insulation or other combustibles between ceiling restops.
ALWAYS maintain speci ed clearances around venting and restop systems.
Install wall shield and ceiling restops as speci ed.
Failure to keep insulation or other material away from vent pipe may cause re.
WARNING
V
1
Minimum H
1
+ H
2
Maximum
1 ft. 305 mm 3 ft 924 mm
2-1/2 ft. 762 mm 6 ft 1.8 m
3-1/2 ft. 1.7 m 9 ft 2.7 m
4 ft. 1.2 m 10 ft 3.1 m
4-1/2 ft. 1.4 m 12 ft 3.7 m
5-1/2 ft. 1.7 m 15 ft 4.6 m
6-1/2 ft. 2 m 18 ft 5.5 m
7-1/2 ft. 2.3 m 21 ft 6.4 m
V
1
= 40 ft. (12.2 m) Maximum
H
1
+ H
2
= 21 ft. (6.4 m) Maximum
V
1
+ H
1
+ H
2
= 30 ft. (9.1 m) Maximum*
* If the horizontal component is less than
5 feet then the total vent run can be
extended to 40 feet.
Note: Must have a 12 inches minimum
vertical vent before attaching a 90° elbow
to the unit.