Monessen Hearth BWB400I, BWBC400I manual Outside Combustion Air Precautions & Recommendations

OUTSIDE COMBUSTION AIR PRECAUTIONS & RECOMMENDATIONS

OUTSIDE COMBUSTION AIR RECOMMENDATIONS (CONTINUED)

1.Extremely long runs and numerous turns in the duct leading from the fireplace to the combustion air assembly should be avoided. These conditions will increase the resistance to the free flow of air through the duct. Refer to Figures 1 and 27 for methods of installing the outside air for combustion assemblies.

2.The combustion air assembly should be located at an exterior location, which is not likely to be accidentally blocked in any manner. The assembly should be located above the snow line to prevent blockage by snow accumulation.

3.The combustion air inlet assembly should never be mounted in a garage or storage area where combustible fumes such as gasoline might be drawn into the fireplace.

4.Combustion air can be drawn from the crawl space under a house when an adequate supply of air is provided by open ventilation.

5.Do not take combustion air from attic space or garage space.

		TERMINATION CAP
FIGURE 27	PLATE
	BASEMENT	FIRESTOP SPACER
	WALL
ABOVE
SNOW		CAUTION:DO NOT TAKE
LEVEL		COMBUSTION AIR FROM
		ATTIC SPACE OR GARAGE.
		INLET GRILLE
		8' MAX. IN SOFFIT
		(OVERHANG)

GROUND

LEVEL

CONCRETE SLAB INSTALLATION (OPTIONAL OUTSIDE AIR RUNS)

BASEMENT INSTALLATION

DUCT EXTENDED TO MISS JOIST

SECOND FLOOR

OUTSIDE	INSIDE
WALL	WALL

FIRESTOP SPACER

45˚ CORNER

INSTALLATION

ON SLAB FLOOR

(ONE WALL,

INSIDE ROOM)

TO OUTSIDE WALL

INSTALLATION ABOVE BASEMENT

OR CRAWL SPACE

23

53D9032. Rev 1 03/03