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FURNACE LOCATED IN CONFINED SPACE
When the furnace is in a utility room, install two open
grilles.
(
See Fig. 9) Place them in a wall or door opening
to the rest of the house. One grille will supply combustion
air.
Locate it near the floor. The other grille is for ventilation.
Locate it close to the ceiling. Each grille must have a free
area. It should be not less than one square inch for each
1000 BTU/hr. of the total input rating of appliances in
confined space.
FOR EXAMPLE
:
Your furnace is rated at 150,000 BTU
per hour. The water heater is rated 30,000 BTU per hour.
The total is 180,000 BTU per hour. You need two grilles,
each with 180 square inches of free opening. Metal grilles
have about 60% free (open) area. Therefore, you need
two metal grilles with 300 square inches each of louvered
area. The height should be about half the width.
FIG. 9
SIZE
1/4” MESH
SCREEN
BTU
WOOD
LOUVERS
BTU
METAL
LOUVERS
BTU
3-1/4 X 12 INCH
8 INCH ROUND
8 X 12 INCH
8 X 16 INCH
144,000
200,000
382,000
512,000
36,000
50,000
96,000
128,000
108,000
150,000
288,000
384,000
BTU Per Hour Input*
* Based on opening covered by 1/4 inch mesh screen, wood or metal louvers.
FRESH AIR DUCT CAPACITIES
Fresh air duct capacities for duct supplying fresh air
18
Plan Your Installation
Summary of Contents for LWO-112
Page 9: ...9 Furnace Features Eagle I Husky...
Page 11: ...11 Furnace Features Eagle II Polar...
Page 31: ...OIL AND WOOD COAL HEATING WITH A C 31 Wiring Diagrams DS 103 DAMPER CONTROL...
Page 32: ...GAS AND WOOD COAL HEATING ONLY 32 Wiring Diagrams DS 103 DAMPER CONTROL...
Page 33: ...GAS AND WOOD COAL HEATING WITH A C 33 Wiring Diagrams DS 103 DAMPER CONTROL...
Page 56: ...EAGLE I HUSKY MODELS LWO 112 LWG 112 56 Exploded Views Parts Lists...
Page 58: ...EAGLE II POLAR MODELS LWO 168 LWG 168 58 Exploded Views Parts Lists...
Page 62: ...WAYNE MODEL P250AF DIN GAS BURNER 62 Exploded Views Parts Lists...