A study carried out by the EPA indicates that the indoor air is 70 percent more contaminated than the air we breath in the outdoors. Taking into consideration the fact that we spend over 90 percent of our time indoors, you can imagine how dangerous your indoor air quality can be. You run a risk of contracting diseases as a result of indoor air pollutants. Luckily, fixing this problem is as simple as changing your A/C air filters. This article provides information on the importance of regularly changing your air filters.