I have a 90% efficient forced air gas furnace and when it was installed 4 years ago the guy didn't hook up a fresh air intake pipe allowing the furnace to draw in air from the hallway(slab home). My question is there are two holes for intake and I need to know if I should use one for the intake and block off the other or does it require two pipes? There is already a 2 exhaust leading outside thru wall.
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Consequently, this water must exit the air handler—typically through plastic pipe or a drain tube. That drain tube goes directly outside, often terminating near the compressor, or to a floor drain or to a small electric “condensate pump” located by the air handler. Where a condensate pump is used, it connects to a 1/2-inch vinyl or rubber tube that exits outdoors or to a drain.
Ductwork pinging or popping. If you hear a pinging or popping sound coming from metal ductwork, this may be caused by thermal expansion or by air blowing past a loose flap of metal. Track along the duct runs, listening for the sound. If you find it, make a small dent in the sheet metal to provide a more rigid surface that’s less likely to move as it heats and cools.