Vermont Casting DBR36, DBR39 Vent Opening Noncombustible Wall, Vertical Sidewall Installation

VERTICAL SIDEWALL INSTALLATION

STEP 1

Locate vent opening on the wall. It may be necessary to first position the fireplace and measure to obtain hole location. Depending on whether the wall is combustible or non- combustible, cut opening to size. Fig. 25.

(For combustible walls first frame in opening).

VERTICAL SIDEWALL APPLICATION

Vent Opening —

Combustible Wall

(240mm) 9-3/8"

9-3/8" (240mm)

(framing detail)

Vent Opening —

Noncombustible Wall

7-1/2" (190mm)

COMBUSTIBLE WALLS (Fig. 25): Cut a 9-3/8"H x 9-3/8"W (240

mmx 240 mm) hole through the exterior wall and frame as shown (Fig. 24).

NON-COMBUSTIBLE WALLS (Fig. 25): Hole opening must be 7.5" (190 mm) in diameter.

Fig. 25

STEP 2

Fig. 26. Measure wall thickness and cut adjustable zero clearance sleeve parts to proper length (MAXIMUM 12"/ 305mm). Adjust sleeve to minimum (9-3/8" x 9-3/8") and attach to firestop with #8 sheet metal screws (supplied). Install firestop assembly.

Zero clearance sleeve is only required for combustible walls.

	#8
Maximum Length	SCREWS(2)
12" (294mm)
#8	ADJUSTABLE
	ZERO CLEARANCE
SCREWS(2)
	SLEEVE
#8
SCREWS(2)
ADJUSTABLE ZERO	FIRESTOP
CLEARANCE SLEEVE
DRYWALL
WOOD FRAMING
	WALL EXTERIOR
FIRESTOP	ZERO
	CLEARANCE
	SLEEVE
	FLUSH WITH
	WALL
VENT PIPE	EXTERIOR
	Fig. 26

- 14 -