Definition

• Indoor air pollution is gas, chemicals and particles that enter the atmosphere of a structure. These pollutants can make the air unhealthy and cause long term illnesses, breathing problems and allergies. People with sedentary lifestyles, the elderly, the very young, the disabled and those who spend a lot of time indoors are most affected by indoor air pollution. The Environmental Protection Agency suggests that indoor air quality may have more effect on overall health than outdoor air pollution.
  
  

Heating and Cooling Sources

• Heating appliances such as wall units, electric fires, coal fires, heat bars and furnaces can cause poor air quality, especially when not maintained or cleaned regularly. Cooling units like air-conditioners and swamp coolers can also push dust, debris and chemicals into the air. Humidifiers and dehumidifiers that are not properly maintained (cleaned, filters change, clean water) can decrease the cleanliness of the air.
  
  

Combustion Sources

• Combustible materials such as fuels (coal, wood, oil, kerosene), tobacco, lighters, and asbestos are major sources of indoor air pollution. Whether it's a smoldering cigarette or off-gassing from exposed asbestos, combustible materials whether ignited or dormant are a major concern.
  
  

Household Products

• Cleaning chemicals, waxes, polishes, deodorizers and aerosols all carry the potential to damage indoor air quality. Hobby glue, craft paints, beauty products, hair products and air fresheners can all affect the air. Indoor use of fertilizers, pesticides, acids, paints, wood stripper, paint stripper, bleach and ammonia can change the quality of the air. It is important to monitor the ingredients, effects and use of such products.
  
  

Ventilation Issues

• A main cause of indoor air pollution is a lack of adequate ventilation. Windows that are sealed to prevent heat loss allow air pollutants to build up. Irritants and pollutants can linger and become more concentrated in buildings that have double glazed windows and tight seal doors. Buildings that may have adequate ventilation can also experience a buildup of pollutants if days or weeks of bad weather make adequate ventilation intolerable. It is always a good idea when using possible irritants and air pollutants to turn on air vents or open a window.