Heating, ventilation, and air conditioning (HVAC) is the technology of indoor and vehicular environmental comfort. Its goal is to provide thermal comfort and acceptable indoor air quality. HVAC system design is a subdiscipline of mechanical engineering, based on the principles of thermodynamics, fluid mechanics and heat transfer. "Refrigeration" is sometimes added to the field's abbreviation, as HVAC&R or HVACR or "ventilation" is dropped, as in HACR (as in the designation of HACR-rated circuit breakers).
The two main systems that are applicable for heating purposes: furnace-based and boiler-based systems. Furnace-based technology is prominent in the North American and APAC markets, whereas boiler-based systems dominate the European market.
The major advantage of boiler-based systems is the that they are based on radiant or
↧