Dehumidifiers running costs

Reading the dehumidifier ranking

Dehumidifiers show the widest running-cost spread of any category we track, by a wide margin, and pints-per-day capacity is the reason. A small unit built for a single closet-sized room and a large unit built for a damp basement are doing genuinely different jobs, so comparing their raw annual cost is a little like comparing a mini-fridge to a chest freezer; capacity, not just efficiency, sets the baseline.

Integrated Energy Factor (IEF), liters of water removed per kilowatt-hour, is this class's real efficiency yardstick, and the efficiency ranking sorts by IEF adjusted for capacity rather than raw dollars. Two units rated for the same pints per day can carry meaningfully different IEF figures and running costs.

Across the 519 certified dehumidifiers we track, running cost ranges from $19 to $521 a year with a median of $64/yr; most of the 519 models we track cluster toward the cheap end of that range, with a smaller group of pricier models stretching the top up to $521/yr. That $502 spread from cheapest to priciest is the largest of any class on this site.

What to weigh when comparing models

Match pints-per-day capacity to your space and humidity load first, an undersized unit will run nearly continuously trying to catch up, which can cost more in practice than a correctly sized larger unit. Once capacity fits the room, compare IEF rather than raw annual cost, and set a realistic target humidity (commonly cited guidance is around 45 to 50 percent) rather than the driest setting, since the last few percentage points cost disproportionately more energy to remove.

Because this class spans such a wide range of capacities and use cases, from a small bedroom unit to a whole-basement machine, we would caution against reading too much into a single overall rank number here. Compare within a capacity band close to what your space actually needs, and let IEF, not raw dollars, settle a close call between two similarly sized units.

How we score this class

Every figure here follows the same formula: each model's published annual kWh from ENERGY STAR, multiplied by the US average residential rate of $0.1856/kWh. Full methodology on how we score, or use the calculator.