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The Goodman GR9S921004CN is a single-stage gas furnace rated at 100,000 BTU input and 92% AFUE. It is a two-piece upflow/horizontal unit with a 9-speed blower and Goodman's tubular heat exchanger, and it vents through PVC pipe rather than a metal flue. It suits medium to large homes in cold climates that want high-efficiency heating without the cost of a two-stage or modulating furnace. Against premium two-stage rivals it gives up some comfort control and noise refinement, but it covers the same efficiency tier with simpler internals and a widely available parts network.
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The Goodman GR9S921004CN is a single-stage gas furnace rated at 100,000 BTU and 92% AFUE. It uses a 9-speed design and Goodman's heat exchanger technology to deliver steady heat. At 92% efficiency, most of the fuel is converted into heat.
It can be installed in an upflow or horizontal configuration. The flue must be vented with plastic/PVC pipe. It runs on natural gas and can be converted to propane with a conversion kit, which is sold separately.
The furnace is built to run quietly and includes electrical safety features. It meets Clean Air Act refrigerant standards. It is intended for medium to large homes, depending on climate.
