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Unread 04-11-2004, 08:56 PM   #4
Groth
Cooling Savant
 
Join Date: Mar 2003
Location: MO
Posts: 781
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Another way to figure dehumidifier capacity is to look at it's 'pints/day' rating. To condense water the dehumidifier has to absorb the water's 'latent heat of vaporization' (2257 Joule/gram).

1 pint/day = 0.00525 grams/second; multiply by 2257 J/g = 11.85 W

That 11.85 W is at dewpoint temperature, which is generally 5 to 10 C below ambient. If you want to cool colder than that, buy more capacity (say, 1.5 to 2 times your expected heat load).
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