What is an AC Unit? AC or air conditioning, is the system designed to cool the air in your home. Some contractors or builders call an AC unit anything that conditions the air, hot or cold.

What does AC unit include?

Parts of a Central AC System

The outdoor unit contains the condenser coil, compressor, electrical components and a fan. The evaporator coil, which is usually installed on top of the gas furnace inside the home. ... A thermostat or control system to set your desired temperature.

How does a AC unit work?

The compressor pressurizes the refrigerant gas and sends the refrigerant into the outdoor unit's condenser coil. A large fan pulls outdoor air through the condenser coil, allowing the air to absorb heating energy from the home and release it outside. During this process, the refrigerant is converted back to a liquid.