Quick answer
The indoor unit that circulates conditioned air through the home.
An air handler is the indoor component that moves air across the coil and through the ducts. Paired with a heat pump, it contains the blower and indoor coil and often electric backup heat. It's essentially the indoor half of a split system when there's no furnace.
Why Air Handler matters
Equipment terms identify which part of the comfort system is doing the work and whether repair, replacement, or an upgrade is the best next step. Understanding the equipment helps you compare options without pressure.
When you'll see this term
You will usually see this term on service invoices, replacement proposals, equipment labels, and repair-or-replace discussions.
Questions to ask your technician
- Is this equipment repairable, or is replacement the better long-term value?
- How old is it, and is it still under manufacturer warranty?
- Would a different equipment type improve comfort or efficiency?