Energy recovery ventilator systems allow buildings to become more and more efficient without compromising indoor air quality. The average American spends 90 percent of their time indoors, and it is common for indoor air to contain up to five times more pollutants than outdoor air. Indoor air pollution is caused by a variety of sources, such as air fresheners, offgasing from pressed wood products and solvents in cleaning products.
The market demand for high indoor air quality is rising and bringing in outside air dilutes pollutants.