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.
Indoor air quality problems can have a major impact on occupant health and comfort. When indoor air quality issues arise, it is important to make sure that only highly- qualified individuals are called upon to investigate, mitigate and confirm that a problem has been properly resolved.
There are three basic strategies to improve indoor air quality:
1. Source Control 2. Ventilation Improvements 3. Air Cleaners
The effectiveness of an air cleaner depends on how well it collects pollutants from indoor air (expressed as a percentage efficiency rate) and how much air it draws through the cleaning or filtering element (expressed in cubic feet per minute). A very efficient collector with a low air-circulation rate will not be effective, nor will a cleaner with a high air-circulation rate but a less efficient collector. The long-term performance of any air cleaner depends on maintaining it according to the manufacturer's directions.