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Old 05-13-2013, 08:44 AM   #1
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dehumidifier exhaust temp


Hello,
how hot should the exhaust air from my 50 pint frigidaire dehumidifier be. It seems to be around 95 degrees f and is heating up the basement. It isn't cool down there anymore! My parents 40 year old dehumidifier exhaust seems much cooler.

Thanks

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Old 05-13-2013, 02:36 PM   #2
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dehumidifier exhaust temp


I would say around 93.4 deg F.

Actually it should produce quite a bit of heat if it is workin properly. Mine does. Your parents unit may be smaller or low on Freon or worn out. My Mom has one and it runs 4ever and is worn out and does not give off much heat. A dehumidifier is like a window AC or fridge or regular AC they all have to give off heat. Just the way it is.

Technically a air conditioner has to raise the heat level 15-20 deg F higher than the incoming air in order to get rid of heat/provide cooling and a dehumidifier is a small refrigeration unit same as a air conditioner. therefore 70-75 incoming air will give U you 90-95 discharge air.

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Last edited by yuri; 05-13-2013 at 02:40 PM.
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Old 05-13-2013, 03:05 PM   #3
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dehumidifier exhaust temp


Thanks for the reply.
I guess venting the heat out of the basement wont help since the basement will need make up air.
I may possibly look into a portable AC that vents the heat outside.
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Old 05-13-2013, 05:14 PM   #4
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dehumidifier exhaust temp


I suspect from a purely thermodynamic/psychrometric point of view that a dehumidifier will remove a lot more moisture than a thru the wall ducted portable unit. That one may overcool the basement B4 it brings the humidity down. A dehumidifier runs a colder temp of coil which can then remove more moisture. The fan is slowed down and it uses a capillary tube or AEV valve to get a colder temp coil. Not a problem in my basement as I want it warmed up. Once the walls are finished and the floor finished in my experience I won't need one but all depends where you live etc.
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