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Room is 139 sq feet and need to know of 10,000

Posted by glenda_al (My Page) on
Sat, Aug 20, 11 at 20:03

btu's for a window ac unit is too big?

My 6500 btu unit has about seen it's last days and need to get a new one. Hard to fine the 6500 btu's now.


Follow-Up Postings:

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RE: Room is 139 sq feet and need to know of 10,000

Even not knowing all the factors such as part of the country, insulation, glazing, room orientation etc., if 6500 btu's did the trick don't get a bigger unit. 10,000 btu's is overkill and will result in poor humidity removal/higher relative humidity. Don't do it!


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RE: Rvvvoom is 139 sq feet and need to know of 10,000

Thank you!


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RE: Room is 139 sq feet and need to know of 10,000

I see some 5000s and 6000s. If yours was keeping you plenty cool on the worst days, you might consider going down in size. Was the 6500 cycling on the hottest days?

I notice that the newer window units typically have the blower set to run continuously, even when the compressor is not going. That tends to increase humidity. That can be bad in humid climates. Look for a model that allows you to run the fan only with the compressor. This is sometimes called an "economy mode". Temps will tend to vary in the room somewhat more, but it is worth it.

As roadking advised, don't oversize!


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