HVAC is an abbreviation for heating, ventilation, and air conditioning. This term is used to describe the overall climate control system within a home, referring to both the heating and cooling equipment. No matter what HVAC system is installed, the purpose of all heating appliances is to use some type of fuel to warm the interior of a home.

HVAC is an abbreviation for Heating, Ventilation and Air Conditioning. HVAC systems enable occupants to have proper control over the heating and cooling temperatures of a space. They are also commonly known by the names of some common components: ductless AC units, boilers, central air conditioners, heat pumps or furnaces.

This type of heating system is called a ducted warm-air or forced warm-air distribution system. It can be powered by electricity, natural gas, or fuel oil. Inside a gas- or oil-fired furnace, the fuel is mixed with air and burned. The flames heat a metal heat exchanger where the heat is transferred to air.