Monessen Hearth BWBC400I 用户手册

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.

CONCRETE SLAB

CONCRETE SLAB
INSTALLATION 

INSTALLATION 
(OPTIONAL OUTSIDE

(OPTIONAL OUTSIDE
AIR RUNS)

AIR RUNS)

INLET GRILLE

INLET GRILLE
   IN SOFFIT

   IN SOFFIT
(OVERHANG)

(OVERHANG)

8' MAX.

8' MAX.

FIRESTOP SPACER

FIRESTOP SPACER

CAUTION:DO NOT TAKE 

CAUTION:DO NOT TAKE 
COMBUSTION AIR FROM

COMBUSTION AIR FROM
ATTIC SPACE OR GARAGE. 

ATTIC SPACE OR GARAGE. 

TERMINATION CAP

TERMINATION CAP

INSTALLATION ABOVE BASEMENT
      OR CRAWL SPACE

      OR CRAWL SPACE

FIRESTOP SPACER

FIRESTOP SPACER

TO OUTSIDE WALL

TO OUTSIDE WALL

DUCT EXTENDED

DUCT EXTENDED
TO MISS JOIST

TO MISS JOIST

SECOND FLOOR 

SECOND FLOOR 

45˚ CORNER

 CORNER

INSTALLATION

INSTALLATION

ON SLAB FLOOR

ON SLAB FLOOR

(ONE WALL,

(ONE WALL,

INSIDE ROOM)

INSIDE ROOM)

INSIDE

WALL

WALL

OUTSIDE

OUTSIDE

WALL

WALL

ABOVE

ABOVE

SNOW

SNOW
LEVEL

GROUND 

GROUND 

LEVEL

BASEMENT 

BASEMENT 

WALL

WALL

PLATE

BASEMENT INSTALLATION

BASEMENT INSTALLATION