1. Return Air Register
Air from the home passes through the grille then enters the air handler and is heated or cooled and dehumidified. Your filter is normally in the grille and should be cleaned or replace monthly.
2. Air Handler
The air handler is typically located in your attic, hanging in your garage or stands vertical in a closet or your garage. The air handler consists of a blower which moves the air, the evaporator coil which cools and dehumidifies, a drain pan which collects the moisture taken out of the air and head strips which heat the air.
3. Supply Air Register
Cooled or heated dehumidified air is distributed through your home by the supply air grilles. Most supply grilles are directional to move the air across the ceiling to displace the heat load of the room.
4. Refrigerant Lines
These are two copper lines which carry the refrigerant to and from the air handler to the condensing unit outside. Once carries a cool gas refrigerant and the other carries a warm liquid refrigerant.
5. Drain Line
The drain line carries the moisture taken out of the inside air and dispenses it outside through a PVC pipe. There is normally a P-Trap outside your home which creates an air trap to allow your unit to drain properly. It is recommended to clean this trap out regularly.
6. Condensing Unit
The condensing unit is the heart of the system. It consists of an outdoor fan, condensing coils and compressor. The compressor compresses the refrigerant into a hot gas which is distributed through the coils and cooled by the fan. The refrigerant then turns into a warm liquid which is transferred through the copper line back to the air handler unit.