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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.
Click for a detailed description of the available ventilation strategies
and for all you want to know on Indoor Air Quality from the U.S. EPA