Definition
The indoor unit that circulates conditioned air through your ductwork. Paired with a heat pump or AC, it houses the blower and evaporator coil.
Why this matters for your home
Inside the air handler sit the blower motor and, on a cooling or heat-pump system, the evaporator coil. It acts as the lungs of the home: pulling in return air, moving it across the coil, and pushing conditioned air back out through the supply ducts.
Because it runs whenever you heat or cool, a worn blower or a dirty coil quietly raises energy use and shortens equipment life. We check airflow, motor amp draw, and coil cleanliness on every maintenance visit so small issues don't turn into a summer breakdown.