Question 1

Which type of dehumidifier is cheapest to run?

Accepted Answer

Peltier at 50W costs just $3.24/month — but it removes almost no moisture. Among real dehumidifiers, a 30-pint compressor at 300W costs $19.44/month — cheapest for actual room-level dehumidification.

Question 2

Are desiccant dehumidifiers more expensive to run?

Accepted Answer

Yes. A desiccant at 600W removes 15–20 pints/day. A compressor at 550W removes 50 pints/day. Per pint of moisture removed, compressor models cost roughly 60% less.

Question 3

Do Peltier dehumidifiers actually work?

Accepted Answer

For very small spaces only — closets, bathroom cabinets, RVs. They remove 12–20 oz/day (versus 50 pints/800 oz for a compressor). For any room, they're insufficient.

Question 4

Which type works best in a cold basement?

Accepted Answer

Desiccant. Compressor models lose efficiency below 60°F and may ice up below 50°F. Desiccant models work at any temperature, though they cost more per pint to operate.

Cheapest Type of Dehumidifier to Run