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View Full Version : Sizing AC unit


brianwynne
Aug 16, 2012, 03:53 PM
What size unit should I install in a 1900 square foot 1 story house? 4 ton??

Grady White
Aug 18, 2012, 06:57 PM
There is no correct short answer to your question. You need to do, or have done a manual J heat gain calculation. There are numerous free or low cost programs available online. Here is one I've used & been happy with: http://hvaccomputer.com/

ma0641
Aug 18, 2012, 09:27 PM
Florida? Alaska, Under trees? Good insulation? Low E windows? 1 story or 2? Basement? Need lots more info