Heat & Glo LifeStyle CRESCENT II D. Vent Diagrams, Top Vent - Horizontal Termination, One Elbow

D. Vent Diagrams

WARNING

Fire Risk. Explosion Risk.

Do NOT pack insulation or other combustibles between ceiling firestops.

•ALWAYS maintain specified clearances around venting and firestop systems.

•Install wall shield and ceiling firestops as specified.

Failure to keep insulation or other material away from vent pipe may cause fire.

1. Top Vent - Horizontal Termination

One Elbow	V1 Minimum		H1	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
V1	4 1/2 ft	1.4 m	15 ft	4.6 m
	V1 + H1 = 38 ft (11.6 m) Maximum
H1		H1 = 15 ft (4.6 m) Maximum

Figure 5.3

Two Elbows

V1 Minimum		H1 + H2 Maximum
2 - 90º Elbows		Cannot do
back to back
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

V1 + H1+ H2 = 38 ft (11.6 m) Maximum

H1 + H2 = 15 ft (4.6 m) Maximum

H2	V1
	H1

	INSTALLED
Figure 5.4	HORIZONTALLY

14 Heat & Glo • Crescent II • 2083-902 Rev. N • 7/09