Vermont Casting BHDR36 Rear Venting Applications, Rear Wall Installations, Step

REAR VENTING APPLICATIONS

Note: It is not necessary to seal the vent pipe joints for any rear vent applications.

Minimum clearances between vent pipe and com- bustible materials are as follows:

Top	- 2" (50 mm)
Sides	- 1" (25 mm)
Bottom	- 1" (25 mm)

Note: Vent Starter Kit Model 7DVRVT must be used in rear vent applications.

Maximum Vent Length 20" - Fig. 13

Fig. 13

20" (508mm)

TOP VIEW

REAR WALL INSTALLATIONS

Minimum clearance between vent pipes and combustible materials in one (1") inch (25

mm)on sides and bottom and two (2") inch (50 mm) on top.

STEP 1

Locate vent opening on wall.

Vent Opening —

Combustible Wall

(240mm) 9-3/8"

10-3/8" (265mm)

(framing detail)

Vent Opening —

Noncombustible Wall

7-1/2" (190mm)

Fig. 14

Combustible Walls. Cut a 10-3/8"H x 9-3/8"W (265mm x 240mm) hole through the exterior wall and frame as shown. Fig. 14.

Non-Combustible Walls: Hole opening must be 7.5" (190mm) in diameter. To locate hole centre consult with appropriate fireplace specifications, page 4.

STEP 2

Measure wall thickness and cut adjustable zero clearance sleeve parts to proper length (MAXIMUM 12"). Adjust sleeve to maximum (10-3/8 x 9-3/8) and attach to firestop with #8 sheet metal screws (supplied). (Fig. 15) Install firestop assembly.

	Maximum Length	#8
		SCREWS(2)
	12" (294mm)	ADJUSTABLE
	#8
		ZERO CLEARANCE
SCREWS(2)
		SLEEVE
	#8
	SCREWS(2)
Fig. 15	ADJUSTABLE ZERO
	CLEARANCE SLEEVE
	FIRESTOP

STEP 3

Measure from fireplace collar face to face of outside wall (add 2" for vent pipe overlap). Mark pipes and cut to length. It is very important that the two pipes are flush with the outside wall once the fireplace is in its final location. Fig. 16.

STEP 4

Slip 4" and 7" pipes onto respective flue collars. Make sure to fix to the fireplace collar the 4" pipe with three (3) screws before fixing the 7" pipe on the 7" collar. Both pipes must be on a level plane. Fig. 17.

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