Heating, Ventilation, and Air-Conditioning (H.V.A.C.) is a climate control system. Described here is the HVAC system for home or small office. Older systems heated the air and passively allowed air to circulate. Modern heating and cooling systems actively circulate the air with blower fans.
HVAC System Basic Components
INSIDE
Evaporator Coil (A-Coil)
Blower
Heat Exchanger
Plenum
OUTSIDE
Condenser Coil
Compressor