Deutsch: Klimaanlage / Español: Climatización / Português: AVAC / Français: Chauffage, ventilation et climatisation / Italiano: HVAC

HVAC (heating, ventilation, and air conditioning) is the technology of indoor and vehicular environmental comfort. HVAC system design is a subdiscipline of mechanical engineering, based on the principles of thermodynamics, fluid mechanics, and heat transfer.

In an industrial or manufacturing context, "heating" typically refers to the process of raising the temperature of a material or substance in order to change its physical or chemical properties. Heating is used in a wide range of industrial processes, such as manufacturing, refining, and processing of various materials.