Air Handlers & Coils

An evaporator coil is just the cold coil that removes heat from indoor air, and it relies on a furnace's blower to move air across it. An air handler combines a coil and a blower in one cabinet, so it moves air on its own — used when there's no furnace.

If you have a gas furnace, you need a matching evaporator coil that mounts on it. If you don't have a furnace — or you're running a heat pump — you need an air handler, which includes the blower.

Yes. The coil or air handler must match the condenser's capacity and refrigerant so the system reaches its rated efficiency. A mismatched indoor unit lowers performance and can void the warranty.

It should match the tonnage of your outdoor unit — a 3 ton condenser needs a 3 ton coil or air handler, for example. We list both by tonnage from 1.5 to 5 tons.

It's not recommended. Older coils are often built for R-410A and different capacities; pairing one with a new condenser undercuts efficiency and typically voids the warranty. Replace the coil with the outdoor unit.