Goodman's GR9S80 furnaces feature high-quality construction and efficient operation at a great value. The GR9S80 single-stage, multi-speed furnaces utilize Goodman's superior heat exchanger design to provide efficient, reliable heating to your home. Instead of a standard multi-speed blower motor, the GR9S80 utilizes an ECM motor, which uses less power and provides smarter circulation. The value doesn't end at efficiency, the GR9S80 features many different connection options to reduce installation time and a self-diagnosing control board to expedite maintenance. If you're looking to cut your energy bills and improve your comfort without breaking the bank, your search stops with the GR9S80.