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N.B. THE SIZE OF THE AIR RETURN DUCT SHOULD BE AT LEAST EQUAL TO THE SIZE OF THE COLD AIR
PLENUM OPENING. The air return duct can be installed at zero clearance with the ceiling.
*The furnace can be installed on a combustible floor. A floor protector must cover all surfaces underneath
the furnace. It must be prolonged 18'' in front of the furnace and 8'' on each side of the loading door. The
floor protector must also cover all surfaces underneath the chimney connector and extending at least 2
inches on either side of the chimney connector.
FIRST 5 FEET OF DUCT INCLUDING
WARM AIR PLENUM
PLENUM AFTER THE FIRST 5 FEET
REAR (INCLUDING CLEARANCE FOR
MAINTENANCE)
SIDES (INCLUDING CLEARANCE FOR
MAINTENANCE)
FRONT (FROM COMBUSTIBLES)
*FLOOR
2" (50mm)
0" (0mm)
24" (610mm)
24" (610mm)
48'' (1219mm)
0" (0mm)
14
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