Heating, ventilation, and air conditioning (HVAC / ˈeɪtʃˌvæk /) systems use advanced technologies to regulate temperature, humidity, and indoor air quality in residential, commercial, and industrial buildings, and in enclosed vehicles.
HVAC systems are traditionally made up of a combination of devices working in tandem to keep your home comfortable. This will often include air conditioning units, dehumidifiers, central heating, and air filtration systems. The development of the first HVAC systems began in 19th Century America.