HVAC (Heating, Ventilation, and Air Conditioning) refers to technology of indoor or automotive environmental comfort. HVAC system design is a major 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 ventilating is dropped as in HACR (such as the designation of HACR-rated circuit breakers)
This commercial-use central air conditioning system makes possible distributed airflow and independent control of indoor units. Design flexibility allows abundant installation variations to ensure a "best match" solution for air conditioning requirements in large residences, schools and offices. Consideration for the environment during development led to develop powerful, compact units that consume minimal energy, have a high coefficient of performance and contribute to maximum room comfort.
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