Goodman GR9S800403AN Gas Furnace

AFUE stands for Annual Fuel Utilization Efficiency, and an 80% rating means that 80% of the fuel consumed is converted into heat for your home, while the remaining 20% is vented outside. This is a standard efficiency level for gas furnaces, making it a reliable and cost-effective choice for many climates.

Yes, this unit is compatible with both natural gas and liquid propane. However, you will need a conversion kit installed by a qualified HVAC professional to safely switch the fuel source.

The multi-speed ECM blower is designed to adjust its airflow based on your home's heating needs, which helps maintain more consistent temperatures than a standard single-speed motor. Because it can operate at lower speeds, it also runs much quieter and uses less electricity.

This furnace is designed for upflow or horizontal (left or right) installation, making it versatile for different basement or attic configurations. Given the 14-inch cabinet width, it is a compact option, but it must be installed by a licensed professional to ensure proper venting and safety compliance.

Goodman backs this model with a 10-year parts limited warranty and a lifetime limited warranty on the heat exchanger. To keep these warranties valid, ensure the unit is registered online shortly after installation.