Bryant 579D is a gas heating/electric cooling rooftop unit designed for the commercial market. It has a low profile and does not distract from the architecture of the building. The 579D is designed for rooftop installation and mounts on a factory-supplied, roof-mounting curb. The ductwork connects to the curb so that the air ducts and curb can be installed before unit arrival.

The 579D has a number of features that make it a good choice for commercial applications. These features include:

• Two rugged, high-efficiency compressors provide two-stage cooling to conserve energy by shutting down one compressor during light cooling loads.