Dehumidifier exhaust

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  #1  
Old 07-24-11, 08:10 AM
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Dehumidifier exhaust

hello,

my 1997 goldstar dh25m-04 dehumidifier is exhausting 100 degree air and i think it is making my basement too hot, close to 79 F. is this a normal exhaust temp. it is around 88 F and humid outside. Not much better in my basement.

thanks
 

Last edited by stickshift; 07-26-11 at 11:23 AM. Reason: corrected title
  #2  
Old 07-24-11, 08:23 AM
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Completely normal....that's just the way standalone dehumidifiers work.
 
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Old 07-26-11, 11:00 AM
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Thanks... What temp should the cold side be??
 
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Old 07-26-11, 11:22 AM
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Dehumidifiers aren't about hot and cold, they're about removing water from the air. I used to close all but one vent in the basement in the summer but after upgrading the dehumidifier, I had to open the vent in the utility room as well to help dissipate the heat; that room was getting uncomfortably warm.
 
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Old 07-26-11, 11:31 AM
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A dehumidifier that won't heat up the basement is called an air conditioner. There are two options available, a portable ac unit where the hot exhaust can be directed inside or outside and a heatpump water heater that puts the excess heat where you need it.

Of course, where the heat needs to go is a seasonal thing and that is hard to meet with one machine.

Bud
 
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Old 07-26-11, 07:46 PM
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thanks, I was just wondering if the cold side was getting cold enough. the unit isnt collecting very much water lately even though it has been 90 f and humid.
 
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Old 07-27-11, 06:50 AM
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If my understanding of a dehumidifier is correct, the basement air is pulled in and passed over the cold coils causing the moisture to condense out. That leaves you with colder but dryer air. But there is the other half of the process which now has excess heat which it needs to dissipate. Central air in a home puts that half outside and a window ac unit hangs it out the window. Since the dehumidifier is completely inside and it now has surplus cold air, it simply passes that cold air over the hot coils dissipating the heat it extracted from the incoming air and completing the process. Net result is humid basement air goes in and warmer dryer comes out and hopefully some water drains out the bottom. There is a net heat gain as the unit consumes electricity which is converted to heat while running the fans and compressors.

There should not be any cold air coming out of a dehumidifier as the process produces heat.

Bud
 
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Old 07-27-11, 08:42 AM
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What's the humidity level in your basement?
 
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Old 07-27-11, 09:37 AM
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The humidity is in th high 60's. I was just wondering how cold the fins need to be to work efficiently. Then I can decide if the unit needs to be recharged, replaced, or if it is working close to specs
 
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Old 07-27-11, 10:13 AM
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It's running all the time, the RH in the room is ~ 65% and the unit is not collecting much water in the bucket?
 
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Old 07-27-11, 12:07 PM
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Yes to all the cold side is around 70F and the exhaust is putting out around 100F and not collecting very much water
 
 

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