I pretty much was not involved with what Air Temp did. I just had them do it. They put in a furnace for me because the old one was not functioning up to quota. The new one is good though. I took a look at the furnace after they were done and I could see that they cleaned up after themselves. They put the furnace on cinder blocks, but it was not quite square, so it was shaking or vibrating sometimes. Somebody else wedged something so that it wouldn't rattle, and now everything is fine.
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