Uses EPA-style moisture removal tables and L/kWh efficiency to estimate pints per day and seasonal electricity spend.
Space & Conditions
Sizing & Running Cost
Recommended capacity
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Shop for a unit rated at this capacity (24 hr).
Annual running cost comparison
Legacy unit (1.2 L/kWh)—
Modern Energy Star replacement—
Legacy annual kWh
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Modern annual kWh
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Liters / day removed
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Your unit cost
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Practical tips & common mistakes
Pints ≠ tank size
Rated pints per day assumes continuous run at 80°F/60% RH. Real basements need oversizing or you run 24/7 at noise max.
Draining into a sump without trap
Pump-out setups that lose prime or cycle incorrectly leave humidity high while the unit appears "running."
Recharge tank pre-charge
Whole-home humidity drops when HVAC runs more — size for July-August standalone dehumidification hours, not spring shoulder season.
Energy Star gap
Modern 50-pint class units use far less kWh than legacy 70-pint dinosaurs. Compare annual run cost, not sticker pints alone.
Note: Sizing follows standard basement moisture tables. Actual removal rates depend on temperature, airflow, and unit maintenance. Energy Star ratings are manufacturer-reported at 65°F / 60% RH.