Indoor air filtration is your first line of defense in achieving good health, but is often overlooked. This is reflected in the minimal provision for air filtration in the design of our heating and air conditioning equipment and a legacy of indoor air quality issues. The most efficient way to filter your indoor air is through your forced air heating and air conditioning filtration system. Electrostatic furnace filters are at the top of the list (just under the expensive HEPA indoor air purification systems) in effectiveness when it comes to removing allergens and other harmful pollutants from all of your indoor air.