Using dehumidifier instead of AC?

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  #1  
Old 01-08-13, 10:25 AM
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Using dehumidifier instead of AC?

A friend told me he never has need to use AC to stay cool in the summer, he uses a good dehumidifier instead, can this be true? Can a dehumidifier substitute for an AC when humidity outside is 100% on a hot summer's day?
 
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Old 01-08-13, 11:07 AM
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An AC unit does remove the humidity from the air before chilling it. All you are doing is removing the chilling.
 
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Old 01-08-13, 11:11 AM
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so would a dehumidifier work to keep your room cool in such a situation?
 
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Old 01-08-13, 11:19 AM
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It may FEEL cooler with lower humidity...but, dehumidifiers work similar to A/C units. They produce heat as part of the process which an A/C dumps outside. Portable dehumidifiers just dump it in to the room...at least those I've seen or used.
 
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Old 01-08-13, 12:47 PM
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" so would a dehumidifier work to keep your room cool in such a situation?"

It would for the first few hours - after that it would just feel hot and somewhat dry.

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More detailed explanation:

Dehumidifiers should be used in spaces which have a moisture problem, not a need for cooling.

Water vapor contains heat (google latent heat) which gets released when it condenses out of the air.

The electricity consumed also gets converted into heat, so when it's warm and humid, a 50+ pint dehumidifier can put out almost as much heat as a space heater.

Energy use (when the compressor actually cycles on) is 10 watts per pint give or take a little...

Hence a 50 pint machine uses around 500 watts, similar to a 5000 BTU window a/c which cools and dehumidifies.

A dehumidifier pretty much is an a/c which dumps the heat it removes directly back into the room, minus the moisture.
 
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Old 01-08-13, 12:50 PM
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ok understood, thanks all.
 
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