Volatile organic compounds or VOCs are molecules containing carbon which are predominantly in the gaseous state at room temperature.This article will present the possible sources of indoor VOCs, how VOCs impact on people with asthma and allergy and discuss the ability of air cleaners to reduce VOCs in the indoor environment.

Air conditioners can play a significant role in good indoor air quality. Greater asthma morbidity – specifically a larger number of hospitalizations, wheezing episodes and night symptoms due to asthma – have been associated with the presence of moisture, mildew and cockroach allergen in homes. Air conditioners provide a dual function of controlling temperature and relative humidity in home environments, as well as potential removal of allergens.