IO137 21
CLEARANCES FROM COMBUSTIBLE SURFACES
CLEARANCES TO COMBUSTIBLES
FRONT 3”(24” RECOMMENDED FOR
SERVICE)
LEFT & RIGHT SIDE 1”
TOP OF PLENUM 1”
REAR 0”
FURNACE MUST BE COMPLETELY
SEALED TO FLOOR OR BASE.
COMBUSTION / VENTILATION AIR SUPPLY
PIPES MUST TERMINATE 12” FROM TOP
OF CLOSET AND 12” FROM FLOOR OF
CLOSET.
DO NOT REMOVE SOLID BASE PLATE
FOR BOTTOM RETURN.
DEQUATE COMBUSTION /
COMBUSTION AIR MUST BE
SUPPLIED TO THE CLOSET.
VENT PIPE CLEARANCE TO
COMBUSTIBLES 6” USING
SINGLE WALL CONNECTOR
OR 1” USING B-1 VENT
IR FOR COMBUSTION OR
VENTILATION MAY NOT BE
TAKEN FROM BATHROOMS,
BEDROOMS OR OTHER
REAS WHERE A DOOR MAY
ISOLATE THAT ROOM.
RETURN AIR DUCTS MUST
BE COMPLETELY SELED TO
THE FURNACE AND
TERMINATE OUTSIDE THE
ENCLOSURE.
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