Basement Dehumidifier

What Size Dehumidifier Do I Need?

When shopping for a basement dehumidifier, be sure to consider the size of your basement in square feet. Most residential dehumidifiers have a recommended square foot coverage area determined through product testing. Estimated square foot ratings typically have corresponding moisture removal capacities.

Moisture removal capacity may be measured at saturation, which refers to an environment with 100% relative humidity, or under AHAM conditions, which is the Association of Home Appliance Manufacturers' standard testing condition of 80 degrees F, 60% relative humidity.

Smaller residential dehumidifiers are usually tested in saturated conditions while larger residential and industrial-grade models are tested under AHAM conditions. When shopping for a dehumidifier, note the model's capacity at saturation and at AHAM to get a more accurate idea of its moisture removal performance in your space. As a rule of thumb, capacity at saturation is roughly double the capacity at AHAM.

Use these sizing and capacity guidelines when selecting a dehumidifier for your basement:

• 350 square feet or less – 25-30 pints at saturation
• 350 to 700 square feet – 40 pints at saturation
• 700 to 900 square feet – 50 pints at saturation
• 900 to 1,200 square feet – 65 pints at saturation
• 1,200 to 2,500 square feet – 100 pints at AHAM
• 2,500 to 3,000 square feet – 135 pints at AHAM

All basements vary in size and conditions. If you need advice on choosing a basement dehumidifier, give our friendly air treatment specialists a call at 800-934-9194. We'll help you find the ideal dehumidifier for your basement.