Dehumidifier Sizing & Pint Capacity Calculator
Calculate required dehumidifier removal capacity in pints per day (PPD) based on room square footage, ceiling height, moisture severity (damp, very damp, wet), and AHAM / DOE test standards for basements, crawl spaces, and living areas.
Space Dimensions & Moisture Level
Total area of basement or living zone
Recommended Dehumidifier Capacity
50-Pint Unit
50 Pints / Day (DOE)
Equivalent to 70 Pints / Day on legacy pre-2019 packaging
Minimum Calculated Moisture Load
42.0 PPD
19.9 Liters of water / day
Operating Energy Consumption
~420 Watts
~5.0 kWh / day (@ 50% duty cycle)
Operating Economics & Drain Specifications
Estimated Monthly Electric Cost:
$24.00 / month (12 hrs/day run time)
Recommended Drain Setup:
Continuous Gravity Hose or Built-in Pump
Target Indoor Relative Humidity:
45%–50% RH (Inhibits mold and dust mites)
Frequently Asked Questions
Why should I buy a 50-pint unit instead of a 35-pint unit if my space is small?
A larger dehumidifier removes moisture much faster and cycles off more frequently. This achieves your target 45%–50% humidity with less total compressor run time, quieter operation, and a longer equipment lifespan.
Do I need a built-in internal pump?
If you have a floor drain or sump basin nearby, standard gravity drainage with a garden hose is maintenance-free. If you must pump water upward into a laundry sink or outdoors through a window, choose a model with an internal condensate pump.