How Is a Split System Different From a Package Unit?

What a Split System Is

A split system is named because the equipment is split into two separate components. One part sits inside the home, usually a furnace or an air handler that moves conditioned air through the ductwork. The other part sits outside in the yard, typically a condenser or a heat pump. The two halves connect through refrigerant lines and electrical wiring.

If you have a furnace inside your home and an air conditioner outside, you have a split system. This is the most common setup for site built houses, and many mobile homes use a split arrangement as well.

What a Package Unit Is

A package unit keeps the heating and cooling equipment together in one self-contained outdoor cabinet. Instead of an indoor and outdoor pair, everything sits in a single box, usually placed beside the home or on the roof. Your ductwork connects directly to that outdoor cabinet.

A quick test: if your ductwork runs straight to the outdoor unit, you have a package unit. If your system has both an indoor cabinet and a separate outdoor cabinet, you have a split system.

Split System vs Package Unit

Which One Do You Have?

The fastest way to tell is to follow your ductwork. Ductwork joining an outdoor cabinet points to a package unit. An indoor furnace or air handler with a matching outdoor condenser points to a split system. Knowing which type you own helps you order matched replacement equipment that fits your existing connections.