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1-5/8” DIAMETER HOLE MUST
BE CUT IN LEFT SIDE OF CASE.
BOTTOM HOLE MUST BE PLUGGED.
DOWNFLOW FURNACES
LEFT SIDE DRAIN
IF THE FURNACE IS
INSTALLED OVER A FINISHED
CEILING, OVERFLOW FROM
THE PRIMARY DRAIN VENT
STACK MUST FLOW INTO AN
AUXILIARY DRAIN PAN TO
PREVENT DAMAGE TO THE
FINISHED CEILING BELOW
CONDENSATE
GROMMET
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