The MRCOOL MPG48S090MO13C Gas/Electric Air Conditioner is a packaged HVAC system that combines electric air conditioning and gas heating in a single outdoor unit for dependable year-round comfort. It works by using an electric refrigeration system to deliver efficient cooling during warm weather and a gas furnace to provide reliable heat in colder conditions. https://www.partshnc.com/mrcool-versapror-r-454b-package-gas-mpg48s090mo13c