A home needs ventilation (the exchange of indoor air with outdoor air) to reduce indoor pollutants, moisture and odors. Poorly ventilated homes can accumulate contaminants such as formaldehyde, volatile organic compounds and radon, causing health problems. Excess moisture in a home can generate high humidity levels which in turn can lead to mold growth and structural damage to a home.

For a detailed description of the available ventilation strategies,click here. For all you want to know on Indoor Air Quality from the U.S. EPA, click here