If the drain for a 90 percent efficient furnace and the drain for the air conditioning coil are run with a common drain, the drain should be sized:
A) For the air conditioning drain, which is larger.
B) To handle the combined condensate output of the air conditioner and the furnace.
C) For the furnace drain, which is larger.
D) To match the cross-section area of the combined drains.
A
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