Reply to Cost of Adding HVAC in attic of old house?

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Reply to "Cost of Adding HVAC in attic of old house?"

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[quote=Anonymous]Typically in houses of that vintage the attic is outside the conditioned space. There is a layer of insulation between the attic and the second floor, and the attic has vents which make it exposed to outside air.

If so, that's not a good place to put your HVAC equipment. It's hot in the summer, which makes the equipment work harder, and in the winter it can be below freezing. If there's any water in the system -- like in a condensate drain -- it can be damaged when it freezes.  Some codes will allow HVAC in an unconditioned attic, some won't, but it's not a good practice, you want the HVAC in conditioned space.

One thing about attics like that is they're often poorly insulated, and they're pretty much the easiest part of the house to add more insulation too. I would recommend doing that first. A thing to look out for is making sure the insulation guy doesn't cover the vents in the attic, that will lead to moisture building up which can rot your roof from the inside. [/quote]

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