The air handler is the indoor component of a heat pump system. It includes the fan and the heating/cooling coil. The air handler is designed for a particular refrigerant, so it must be matched with the heat pump or air conditioner.
We offer many air handlers with variable and multi-speed features that can provide enhanced indoor comfort by slowly ramping up to your thermostat setting rather than simply turning on at full speed. This alleviates the "cold air blow" often associated with single speed air handlers, and dramatically reduces system noise.