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It is better to have a hvac company come out and do a heat calculation on the house then it is to follow a basic sq ft heat calc.

Call around for a company that has heat calc software, that takes into account the windows,walls, doors, attic, and they should also give you a copy of the calc.

This way you get the best system for the house.

You can find a heat calc for sq ft online, but I recommend getting the right calc.

If you have 2x4 walls with r13, or 2x6 with r19, you could be losing or overpowering

the house without taking all this into account with a good heat calc.

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15y ago

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