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ac return duct size
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  1. HVAC
    I'm currently finishing up a plumbing project in my house and happened to learn a little more about the HVAC supply and returns in my house, after openning up parts of walls and ceilings. My upstairs is hard to cool and heat. Just a got a new unit 2.5 tons, up form 2 tons. Its a small 2 story...
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