The three types of air cleaning most commonly used are particulate filtration, electrostatic precipitation, and gas sorption. Air Exchange Rate. The rate at which outside air replaces indoor air in a space. Does not include ductwork, registers or grilles, or boilers and chillers. Agent that kills microbial growth.
Biological contaminants are or are produced by living things.
Biological contaminants can be inhaled and can cause many types of health effects including allergic reactions, respiratory disorders, hypersensitivity diseases, and infectious diseases. Typical Indoor Air Pollutants for more information. Central Air Handling Unit. For purposes of this document, this is the same as an Air Handling Unit, but serves more than one area. Cubic feet per minute.