Residential units can further improve indoor air quality by routine air pollution episodes pdf of carpets and area rugs. Determination of IAQ involves the collection of air samples, monitoring human exposure to pollutants, collection of samples on building surfaces, and computer modelling of air flow inside buildings. The resulting exposure to high levels of particulate matter resulted in between 1. 5 million and 2 million deaths in 2000.
Radon is probably the most pervasive serious hazard for indoor air in the United States and Europe, probably responsible for tens of thousands of deaths from lung cancer each year. There are relatively simple test kits for do-it-yourself radon gas testing, but if a home is for sale the testing must be done by licensed person in some U. Radon may also be introduced into a building through drinking water particularly from bathroom showers. The half life for radon is 3.
8 days, indicating that once the source is removed, the hazard will be greatly reduced within a few weeks. They are usually cost effective and can greatly reduce or even eliminate the contamination and the associated health risks. 48 hours, mold mildew can propagate and release allergenic spores into the air. In many cases, if materials have failed to dry out several days after the suspected water event, mold growth is suspected within wall cavities even if it is not immediately visible.