A medium-capacity dehumidifier, which is between 40 and 50 pints, covers between 2,500 and 3,500 square feet. In addition to the size of the room, consumers should consider the humidity level of the room when deciding what size dehumidifier to buy.
Dehumidifiers are rated for pint-removal capacity per day, so a medium-capacity dehumidifier removes between 40 and 50 pints of water from the air every 24 hours. Damper rooms need higher-capacity dehumidifiers. For instance, a small laundry room may need a medium-capacity dehumidifier because of all the wet laundry that hangs there. On the other hand, a medium-capacity dehumidifier may be sufficient for a room larger than 3,500 square feet if the room is only slightly humid.