heating, ventilating, and air conditioning
The mechanical systems that control the temperature, fresh-air flow, and, sometimes, the humidity and airborne dust level inside a building. See also air conditioning, heating, ventilation. (Bucher, 1996)
The mechanical systems that control the temperature, fresh-air flow, and, sometimes, the humidity and airborne dust level inside a building. See also air conditioning, heating, ventilation. (Bucher, 1996)