Quote:
Originally Posted by biker1
Ask the contractor to do a "Manual J" calculation on your home. If they don't know what this is then move on to another contractor.
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biker1 hit the nail on the head. This is the only way to calculate the correct size. If you live in Sumter County the newer homes have the manual J for the home on their website, along with your blueprints, etc. If you have had any improvements done on the home like more insulation, enclosed a lanai, new windows, etc., you should have a new Manual J calculation done.