What are some different types of air handlers?

Terminal units are small, simple air handlers. They only contain an air filter, coil, and blower.

Makeup air units (MAU) is a larger unit. They condition outside air and do not incorporate recirculated air.

Packaged unit (PU) also known as a rooftop unit (RTU) is an air handler designed to be used outside. They are usually placed on rooftops.