Heat & Glo LifeStyle CRESCENT II Termination Locations, Vent Termination Minimum Clearances

4 Termination Locations

A. Vent Termination Minimum Clearances

HORIZONTAL

OVERHANG

WARNING

Fire Risk. Explosion Risk.

Inspect external vent cap regularly.

•Ensure no debris blocks cap.

•Combustible materials blocking cap may ignite.

•Restricted air flow affects burner operation.

2FT.

MIN.

GAS DIRECT VENT

TERMINATION CAP

20 INCHES MIN.	VERTICAL
LOWEST	WALL
DISCHARGE
OPENING

X

12

ROOF PITCH

IS X/ 12

H (MIN.) - MINIMUM HEIGHT FROM ROOF TO LOWEST DISCHARGE OPENING

WARNING

Fire Risk. Explosion Risk.

Maintain vent clearance to combustibles as specified.

•Do not pack air space with insulation or other materials.

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

Measure vertical clearances from this surface.

Measure horizontal clearances from this surface.

(See Figure 4.4 for specific clearances)

Figure 4.1

Roof Pitch	H (Min.) Ft.
Flat to 6/12	1.0*
Over 6/12 to 7/12	1.25*
Over 7/12 to 8/12	1.5*
Over 8/12 to 9/12	2.0*
Over 9/12 to 10/12	2.5
Over 10/12 to 11/12	3.25
Over 11/12 to 12/12	4.0
Over 12/12 to 14/12	5.0
Over 14/12 to 16/12	6.0
Over 16/12 to 18/12	7.0
Over 18/12 to 20/12	7.5
Over 20/12 to 21/12	8.0

* 3 foot minimum in snow regions

Figure 4.2 Minimum height from roof to lowest discharge opening

Figure 4.2 specifies minimum vent heights for various pitched roofs.

A	B
6 in. (minimum) up to 20 in.	18 in. minimum
152 mm/508 mm	457 mm
20 in. and over	0 in. minimum

Gas, Wood or Fuel Oil

Termination Cap

B

A*

Gas

Termination

Cap **

*If using decorative cap cover(s), this distance may need to be increased. Refer to the installation instructions supplied with the decorative cap cover.

**In a staggered installation with both gas and wood terminations, the wood termination cap must be higher than the gas termination cap.

Figure 4.3 Staggered Termination Caps

Î

Heat & Glo • Crescent II • 2083-902 Rev. N • 7/09 11