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Old 11-18-2010, 10:08 PM   #1
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Furnace and Air Condition Sizes


We have had 3 different estimates to replace our HVAC systems. The recommended sizes on the furnace range from 60,000 BTUs to 90,000 BTUs at 95% efficiency. The A/C range from a 2.5 ton to a 3 ton.
Our home is about 2000 square feet and we live in SW Ohio.

How do we know which is right?

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Old 11-19-2010, 04:14 AM   #2
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Furnace and Air Condition Sizes


May want to do your own load calc.

http://hvaccomputer.com/talkref.asp

A 90,000 95% furnace needs to move a lot of air. So you don't want to get a furnace that is oversized for your ducts, and sounds like a jet engine while running. Let alone uses more gas then needed.

Same problem can happen with the A/C. Too large uses more electric, and can require to much air flow through the duct work.

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