You may not think about the air quality in your home because the problem isn’t visible, but that doesn’t stop dust, dander, or chemicals from polluting your air. Everyday living generates up to 40 pounds of dust in a six-room house every year, according to the National Air Duct Cleaners Association (NADCA), the HVAC Inspection, Maintenance and Restoration Association.

Taking steps to clean the air in your home will do more than just improve air quality; it will also save you money. Twenty-five to 40 percent of the energy used for heating or cooling a home is wasted because contaminants in the heating and cooling system cause it to work inefficiently, according to the U.S. Department of Energy.

Make sure to hire a NADCA-certified technician. All members have certified Air Systems Cleaning Specialists (ASCS) on staff and they are required to further their education by attending seminars and adhering to the NADCA code of ethics.

Encourage ventilation

Today’s newer homes are built air tight, making ventilation difficult. The simplest way to encourage ventilation is to simply open windows. In the bathroom, turn on the exhaust fan to stop steam from collecting dirt and keeping it in the bathroom. In the kitchen, place any appliance that creates steam or oily vapor under the stove hood. Finally, make sure vents on the outside of your home are not blocked by leaves or snow as the season dictates.

Prevent mold

Mold can be one of the most harmful contaminators of air quality. You’ll find mold in areas where moisture and poor ventilation come together. Vacuum rear grills on appliances like your fridge and freezer to improve ventilation and empty and clean any drip trays to eliminate mold. If you have a leaky pipe in your home make sure it is addressed. Take a tour outside and trim any bushes or shrubs that have grown too close as that proximity can lead to mold and algae.

Replace filters and screens

In the warmer months, clean the area around your air conditioner and repair any vermin screens on your chimney flues that may be damaged. During the cooler months, remove screens from any window that may trap condensation and make sure to change your furnace filter monthly.