Dehumidifier Sizing Calculator

Calculate dehumidifier capacity based on space conditions and moisture load.

Calculation Method

Floor Area (sq ft)

Ceiling Height (ft)

Space Condition

Current RH (%)

Target RH (%)

Indoor Temperature (F)

Application Type

Area (sq ft)	Moderate	Very Damp	Wet
500	20 pints	25 pints	30 pints
1000	30 pints	40 pints	50 pints
1500	40 pints	50 pints	60 pints
2000	50 pints	60 pints	70 pints
2500	60 pints	70 pints	80 pints

ASHRAE Target: 30-50% RH for comfort

Pool Areas: 50-60% RH typical

1 pint = 1.043 lbs of water

1 lb/hr = 1,060 BTU/hr latent

Dehumidifier Requirements