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The Goodman GR9S801205DN is a single-stage, non-condensing gas furnace with 120,000 BTU input and about 96,000 BTU output at 80% AFUE. Its nine-speed ECM blower gives installers several airflow settings to match different duct systems, and the wider cabinet suits high-capacity residential jobs. It is a straightforward choice for large homes in milder climates where a condensing furnace's extra efficiency is not required. Against 96%+ modulating rivals it is simpler and less efficient, but it has fewer parts to fail and works with standard venting.
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Owners and installers rate the GR9 series well overall, praising its simple build and steady heat output. Complaints center on the single-stage cycling and the lower efficiency compared with condensing models.
The Goodman GR9S801205DN is a gas furnace for residential ducted heating systems. It has a 120,000 BTU input rating and delivers approximately 96,000 BTU of heating output at 80% AFUE.
It is a non-condensing furnace with a single-stage gas valve, so it runs at its rated heating level whenever there is a call for heat. The nine-speed ECM blower motor offers multiple airflow settings to suit different HVAC system requirements.
The furnace supports upflow and horizontal configurations. It has a 24.5-inch-wide cabinet and uses 115V power. The right furnace size depends on the building's actual heat loss, including climate, insulation, windows, layout and air leakage.
