Today’s homes eliminate nearly all wasteful air leaks, helping to control energy costs. Because homes are air tight, pollutants are trapped indoors. The health hazards from indoor air pollutants are broadly recognized as one of today’s top environmental hazards.
Indoor pollution sources that release gases or particles into the air are the primary cause of indoor air quality problems in homes. Inadequate ventilation can increase indoor pollutant levels by not bringing in enough outdoor air to dilute emissions from indoor sources and by not carrying indoor air pollutants out of the home. High temperature and humidity levels can also increase concentrations of some pollutants.