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Old 07-18-2010, 08:13 PM   #1
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BTU Deficiency


I had a Manual J performed on my house and it came up at exactly 48,000 BTUs. If I put in a system that is rated at 46,000 BTUs, should that be of any concern? Will the 2,000 BTU deficiency cause stress on the C/U?

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Last edited by cannonman; 07-18-2010 at 08:34 PM.
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Old 07-18-2010, 08:18 PM   #2
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BTU Deficiency


Where are you located ?

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Old 07-18-2010, 08:26 PM   #3
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BTU Deficiency


The odds are 48 KBTUH is oversized.
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Old 07-18-2010, 08:31 PM   #4
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BTU Deficiency


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Where are you located ?
Hot & humid, humid & hot South Florida.
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Old 07-18-2010, 11:15 PM   #5
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BTU Deficiency


What was the sensible load, and what was the latent load.
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Old 07-18-2010, 11:23 PM   #6
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BTU Deficiency


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What was the sensible load, and what was the latent load.
I couldn't tell you. I didn't do the calculations myself and I wasn't provided that data.
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Old 07-18-2010, 11:27 PM   #7
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BTU Deficiency


Then we can't tell you how well or how bad a 46,000 BTU unit will be for your house.

If you have a lot of air infiltration. It probably won't do very well. if, on the other hand, your house has little infiltration, it will probably do fine.
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Old 07-19-2010, 07:04 AM   #8
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BTU Deficiency


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Originally Posted by beenthere View Post
Then we can't tell you how well or how bad a 46,000 BTU unit will be for your house.

If you have a lot of air infiltration. It probably won't do very well. if, on the other hand, your house has little infiltration, it will probably do fine.
I'll see if I can get that data today.

Thanks, everyone.

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