Dehumidifier sizing Last reviewed June 2026
What Size Dehumidifier for a Bedroom?
By the WhatSize editorial team 5 min read Standards-reviewed
For a typical bedroom (150-300 sq ft), a 22-pint dehumidifier is usually sufficient. If the bedroom has an attached bathroom or is a large master suite, consider 35 pints.
Special Considerations for Bedroom Dehumidifiers
Bedrooms present a unique case for dehumidifier sizing because noise level matters almost as much as capacity. A 22-pint dehumidifier is sufficient for most bedrooms up to about 300 sq ft, but you'll want to prioritize models with quiet operation (under 50 dB) since the unit will run while you sleep.
Top picks for this size
These Amazon-available picks meet the calculated spec. For region-specific or licensed contractor-installed options, consult a local professional. See our Disclaimers.
When a Bedroom Needs More Than 22 Pints
- If the bedroom is a large master suite (400+ sq ft) with sitting area
- If there's an attached bathroom that generates steam
- If the bedroom is in a basement or below-grade
Frequently asked questions
What size dehumidifier do I need for a bedroom?
Look for models rated under 50 dB. The hOmeLabs 22-Pint and Midea 22-Pint Cube both operate around 47-49 dB on low speed.
Can a dehumidifier make a bedroom too dry?
Yes. If a dehumidifier runs continuously without a humidistat, it can drop humidity below 30%. Always set a target humidity (45-50%) and let the unit cycle automatically.
Should I close the bedroom door when running a dehumidifier?
For best results, yes. Closing the door contains the dehumidified air within the bedroom, making the unit more efficient.
You might also need
More dehumidifier sizing guides
- What Size Dehumidifier for a 500 Sq Ft Room?
- What Size Dehumidifier for a 1,000 Sq Ft Space?
- What Size Dehumidifier for a 1,500 Sq Ft Space?
- What Size Dehumidifier for a 2,000 Sq Ft Space?
- What Size Dehumidifier for a Basement?
- What Size Dehumidifier for a Crawl Space?
- 50-Pint vs 70-Pint Dehumidifier: Which Size Do You Need?
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