The terms "HVAC" and "central heat and air" are often used interchangeably, but there are some subtle differences between them.
HVAC, which stands for Heating, Ventilation, and Air Conditioning, is a broader term that encompasses the entire system responsible for heating, cooling, and regulating indoor air quality in a building. It includes both heating and cooling components, as well as ventilation systems that circulate and exchange indoor and outdoor air.
"Central heat and air" specifically refers to a centralized heating and cooling system that uses a single unit to provide both heating and cooling throughout the building. This system typically consists of a furnace for heating and an air conditioner or heat pump for cooling. It utilizes a network of ducts to distribute conditioned air throughout the building.
HVAC refers to the complete system that encompasses heating, cooling, and ventilation, while central heat and air specifically refers to a centralized system that provides both heating and cooling using a single unit. Central heat and air systems are a common type of HVAC system used in many residential and commercial buildings.