Central heating systems forced air
My house has a crawlspace.
It's been tough getting heating contractors to come out and give an estimate. I've only been able to get 2 estimates thus far. It seems that business is so good for these guys that they can afford to be choosey.
Contractor #1 said to put the heating unit in the house attic. A single ceiling duct would each be run into the bedrooms, kitchen, the bath plus the living room/dining room combination.
Contractor #2 proposed to put the heating unit in the garage attic (would make servicing much easier), run a ceiling duct each into the bedrooms, bathroom, kitchen and TWO ducts in the living room/dining room combination plus an intake duct in the hallway. The hall intake duct was explained that this duct would recirculate air sucked in from the other rooms.
I'm confused. Since air rises, would it not be better to put ducts in the floor? For houses that don't have crawlspace, how is the house efficiently heated if the warm air is coming from the ceiling? Since warm air rises, is it not silly to put the ducts in the ceiling?
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