Hearth and Home Technologies Crescent II Vent Diagrams, Top Vent Horizontal Termination

D. Vent Diagrams

WARNING

Fire Risk. Explosion Risk.

Do NOT pack insulation or other combustibles between firestops.

• ALWAYS maintain specified clearances around venting and firestop systems.

• Install 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
		4 1/2 ft	1.4 m	15 ft	4.6 m
	V1	V1 + H1 = 38 ft (11.6m) Maximum
		H1	= 15 ft (4.6 m) Maximum
	H1

Figure 5.3

Two Elbows

V1 Minimum		H1 + H2 Maximum
2 - 900 elbows back		Cannot do
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

HORIZONTALLY

Figure 5.4

12 Heat & Glo • Crescent II • 2083-902 Rev. G • 9/05