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Heat & Glo • Crescent II • 2083-902 Rev. N • 7/0914
H
1
V
1
Figure 5.3
Figure 5.4
D. Vent Diagrams
1. Top Vent - Horizontal Termination
One Elbow
Two Elbows
INSTALLED
HORIZONTALLY
H
1
H
2
V
1
Fire Risk. Explosion Risk.
Do NOT pack insulation or other combustibles between ceiling fi restops.
• ALWAYS maintain specifi ed clearances around venting and fi restop systems.
• Install wall shield and ceiling fi restops as specifi ed.
Failure to keep insulation or other material away from vent pipe may cause fi re.
WARNING
V
1
Minimum H
1
Maximum
Elbow only 2 ft 610 mm
6 in 152 mm 2 ft 610 mm
1 1/2 ft 457 mm 3 ft 914 mm
2 1/2 ft 762 mm 5 ft 1.5 m
3 1/2 ft 1067 mm 7 ft 2.1 m
4 1/2 ft 1.4 m 15 ft 4.6 m
V
1
+ H
1
= 38 ft (11.6 m) Maximum
H
1
= 15 ft (4.6 m) Maximum
V
1
Minimum H
1
+ H
2
Maximum
2 - 90º Elbows
back to back
Cannot do
6 in 152 mm 2 610 mm
1 1/2 ft 457 mm 3 ft 914 mm
2 1/2 ft 762 mm 5 ft 1.5 m
3 1/2 ft 1067 mm 7 ft 2.1 m
4 1/2 ft 1.4 m 15 ft 4.6 m
V
1
+ H
1
+ H
2
= 38 ft (11.6 m) Maximum
H
1
+ H
2
= 15 ft (4.6 m) Maximum