That little dehumidifier tucked away in your basement is great for pulling moisture out of the air and combating the growth of mold and mildew, but it uses more energy than you might think.

One study found the average annual energy use of a typical dehumidifier is 1,000 kilowatt-hours (kWh) — more than $100 a year at the current national average electricity rate. Fortunately, there are things you can do to control humidity without drying up your energy budget.

Upgrade for energy efficiency

Purchase an ENERGY STAR®-certified dehumidifier, which provides great performance and uses nearly 15% less energy than standard units. The annual energy saved by an ENERGY STAR dehumidifier could power your ENERGY STAR-certified refrigerator for two months!

Search for the right unit capacity. Dehumidifier capacity is measured in pints per day. Most models range from 30 to 70 pints per day or more. The capacity you need depends on the size and condition of the space. For example, a larger damp basement room may require a larger-capacity unit.

Location is also important. Many dehumidifier models have a top air discharge and can be placed against walls. If your unit discharges in the back, locate it away from walls or furniture to ensure the free flow of air.

Reduce humidity in your home

Eliminating sources of moisture can decrease the need for dehumidification. Here are some tips:

• Use ventilation fans in your kitchen and bathrooms to remove humidity at the source.
• Make sure your clothes dryer is properly vented outdoors.
• Improve the drainage around the foundation of your home; this can decrease humidity in the basement.
• Your central air conditioner can help control humidity — take advantage of it.

For more ideas on how to keep your home dry and comfortable, see moisture control from the U.S. Department of Energy.