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air conditioner size.

My house in phoenix was appx 1520sq ft(no basement) and in Omaha it is appx 2100-2200 sq ft with 900 sq ft of that in finished basement. Need new ac condenser or whole unit. My unit in Omaha was a 2.5ton. But in phoenix it was bigger. Is that because even thugh house was smaller the excessive heat in phoenix required a bigger unit?

Re: air conditioner size.

The average temp in Phoenix for the summer months is well over 100 degrees. Omaha might have a hand full of 100 degree days in summer. A/C is designed for the normal load, not the occasional aberration. On rare occasions, it gets over a hundred here in Portland, Oregon , but my house is just barely keeping up then, as it was designed for much lower average summer temps.

My guess is that your house in Phoenix is a ranch home and your Omaha home is a two story. The amount of attic space greatly affects the heat load.

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