According to studies by the U.S. Environmental Protection Agency (EPA), indoor levels of airborne pollutants may be 2-5 times, and occasionally 100 times, higher than outdoor levels. Moreover, we spend about 60% of our time inside our homes where poor air quality is attributed to the cause or aggravation of half of all illnesses.
Indoor air pollutants can be liquid or solid materials and can be composed of inorganic or organic compounds, bacteria or viruses. Common indoor pollutants include pet dander, dust mites, fungal spores, molds and pollens.