Question about Goodman CLQ30AR32 Air Conditioner

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I have a Goodman GSC130361DE it is too small for a 2100sq ft home

I have a Goodman GSC130361DE it is about 2 years old. My house is 2100sq ft. Since I bought the house I have noticed the AC does not cool properly. I had an AC company come over and check it and they said the AC was fine. I had a second company come and they said the unit was too small for the house. Is the unit really too small for the house?

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Well you have a 3 ton system, it might be a tick small depending on windows and insulation in the house. Make sure you set it at one temp and leave it. Zoneing would also help.

Posted on Jul 17, 2010

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Both companies can be right at the same time and I will explain this. You have a 3 ton system, going by the model number you have given. For every 1 ton of air, you get an average of 400 cfm. That is 1200 cfm for your system. You need an average of 1 cfm per square foot, that's the basic way to calculate a residential system. So, if your house is 2100 sq ft, you need at least 2100 cfms, which is a 5 ton unit. That is were the company that says it's to small gets there diagnosis, on the other hand, with a unit that is to small, it can still operate the way it's supposed to and the company that says it's fine is probably going off of the way the unit is ''technically'' working. Things to consider though before you come to an conclusion, when you say that your house is 2100 sq ft, the unit only needs to be based on square footage of "living space". The best way to do this is to go to each room where there is a supply register and get the sq ft of each room, it might be smaller than 2100 sq ft. A lot of people, when selling a home, will include the garage and other "non living" spaces in the square footage. Other things to consider are the heat loads of each room, meaning how many windows, doors, etc. Depending on the heat loads, the placement of the registers, and your duct work, you can have the right sized system and still not get the performance it's meant to have. The problem still remains that your not happy with the system's performance and that's the important thing, unfortunately, it might be a lot bigger of a problem than you thought. Hope this helps and good luck!

Posted on Jul 17, 2010

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