Regency 946-523/P, 510-994 Framing and Finishing, Clearance Requirements, Combustible Mantels

Gas Fireplaces

P33 Gas Fireplace

Framing and Finishing

1)Determine the total thickness of facing material (e.g. drywall plus ceramic tiles) to allow the finished surface to be flush with the front of the unit. Total facing thickness can vary from 1/2” (13mm) to 1-¼” (32mm) thick.

2)Frame in the enclosure for the unit with framing material.

3)For exterior walls, insulate the enclosure to the same degree as the rest of the house, apply vapor barrier and drywall, as per local installation codes. (Do not insulate the fireplace itself.)

4)The top of the unit must not be closer than 30” (762mm) to the ceiling.

5)Combustible material may be brought up to the top and sides of the unit and be covered with ceramic tiles, bricks, rock or other suitable combustible finishing materials.

Note: The unit does not have to be completely enclosed in a chase. The clearance on top of the unit is 0” to the standoffs so combustible building materials can be laid directly on top of the standoffs. You must maintain proper clearances from the vent to combustible materials (See Below).

6)Use metal studs for framing where the minimum clearance from the vent to combustible material cannot be maintained.

Clearance Requirements

D

C

A

F

B

B

E

Clearance:	Dimension	Measured From:
A: Mantel Height	7” (178mm)	Minimum (Additional on this page)
B: Sidewall	7-1/2” (191mm)	Side of installed front
C: Ceiling	30” (762mm)	Top of installed unit
D: Mantel Depth	12” (305mm)	Maximum (Additional on this page)
E: Alcove Width	48” (1219mm)	Sidewall to Sidewall (Minimum)
F: Alcove Depth	36” (914mm)	Front to back wall (Maximum)

Top of Hearth must not be higher than the base of the firebox.

30

Gas Fireplaces

Vent Clearances	Clearance Dimension
Horizontal - Top	2-1/2” (64mm)
Horizontal - Side	1-1/2” (38mm)
Horizontal - Bottom	1-1/2” (38mm)
Vertical - Flex	1-1/2” (38mm)
Vertical - Rigid	1-1/4” (32mm)

WARNING

Failure to maintain required clearances is a major cause of chimney related fires. Installation of this fireplace must comply with these clearances.

Combustible Mantels

Because of the extreme heat this fireplace emits, the mantel clearances are critical. Combustible mantel clearances from top of the louvers are shown in the diagram below. Mantel may be installed anywhere in the shaded area or higher.

	Mantel Clearances
12	10	8	6	4	2	0
		12"(305mm)				Drywall
			7-1/2"(191mm)
			3-1/2"(89mm)				Standoff
	B		C			(76mm)3”
					D
0
		A		Top of
					Unit
					Side View

Mantel Clearances	A	B	C	D
Front	29” (737mm)	11” (279mm)	9” (229mm)	7” (178mm)

Note: If desired a non-combustible mantel may be installed at a lower height.

Note: Ensure the paint that is used on the mantel and the facing is “heat resistant” or the paint may discolour.

Mantel Leg Clearances

Combustible mantel leg clearances as per diagram below: Clearances are from the finished edge of the unit or an installed front.

Maximum

1-1/2” projection at 2” minimum clearance.

August 2008 Product Specifications Book