100,000 BTU 80% AFUE Variable Speed Two Stage Goodman Gas Furnace | 21" Width | Upflow / Horizontal

Goodman 100,000 BTU 80% AFUE Upflow/Horizontal Gas Furnace

Variable-Speed Gas Heating with Enhanced Comfort

When winter temperatures arrive, this Goodman gas furnace delivers dependable whole-home heating with practical efficiency and durable performance. Designed with modern blower and reliable gas burner technology, as well as installation options for compatible applications, it provides a strong heating solution for residential use.

Key Benefits

• 100,000 BTU Heating Capacity – Perfect for 2,200–2,600 sq. ft. homes in various climates when properly sized and installed.
• 80% AFUE Efficiency – Converts approximately 80% of fuel consumed into usable heat for your home.
• Variable-Speed ECM Blower Motor – Helps provide quieter, more consistent airflow and comfort control.
• Upflow/Horizontal Installation – Designed for upflow/horizontal applications to fit compatible installation layouts.
• 21" Cabinet Width – Designed to fit evaporator coils of a matching width.
• Two-Stage Gas Heating – Uses staged heating operation to support improved comfort compared to basic single-stage equipment.
• Convertible to Liquid Propane – Can be field-converted to use liquid propane with an optional conversion kit.
• Quiet, Durable Operation – Heavy-gauge steel cabinet and insulated design help reduce sound while protecting internal components.
• Strong Warranty Coverage – Backed by Goodman limited warranty coverage when properly installed and registered online.

Heating Capacity and AFUE Guidance

This furnace is perfect for 2,200–2,600 sq. ft. homes in various climates when properly sized and installed. With a 100,000 BTU input rating and 80% AFUE efficiency, it is designed to provide dependable heating for compatible residential applications. Proper furnace sizing should always be confirmed through a professional load calculation based on climate, insulation, windows, ceiling height, layout, air leakage, and other home-specific factors.

Efficient Everyday Heating Performance

An 80% AFUE furnace provides dependable gas heating performance for compatible residential applications. For example, a 100,000 BTU input rating at 80% AFUE provides approximately 80,000 BTUs of usable heating output, while the remaining heat is lost to the combustion process and exits through the venting. Because this is an 80% AFUE furnace, it requires metal flue venting. Homes with plastic or PVC furnace venting require a 90% AFUE or higher furnace. This furnace is designed for enhanced comfort control compared to basic single-stage equipment.

Advanced Airflow with a Variable-Speed ECM Blower

The integrated variable-speed ECM blower motor helps provide quieter, more consistent airflow throughout the home. This blower design supports improved comfort control and efficient air circulation during heating operation.

Built for Long-Term Reliability

A heavy-gauge steel cabinet, durable hot surface igniter, self-diagnostic control board, and Goodman’s proven heat exchanger design work together to support long-term performance. The self-diagnostic controls simplify troubleshooting and service, while the insulated cabinet helps reduce operating noise.

Warranty

When installed according to applicable codes and registered online with Goodman, this furnace includes:

• 10-Year Parts Limited Warranty
• 10-Year Unit Replacement Limited Warranty
• Lifetime Heat Exchanger Limited Warranty

Warranty coverage requires proper installation and online registration. Installation by a qualified HVAC professional is recommended to maintain warranty eligibility.

What’s Included

• Goodman gas furnace

Recommended Accessories

• Wall-Mounted Thermostat – Provides compatible temperature control for the furnace and connected HVAC system.
• Propane Conversion Kit – Converts the furnace from natural gas to liquid propane when propane operation is required.
• Return Air Package – Provides return air components for a cleaner installation setup.
• Supply Plenum – Creates a proper supply air transition above the furnace.

Requirements, Considerations & Required Notices

• Professional Installation Required – This gas furnace should be installed and serviced by a trained HVAC technician in accordance with local codes and manufacturer requirements.
• Metal Flue Venting Required – This 80% AFUE furnace requires metal venting materials. Homes with plastic or PVC furnace venting require a 90% AFUE or higher furnace.
• Electrical Requirements – Requires 115-volt, single-phase power and proper circuit protection.
• Cabinet Width – Confirm the 21" cabinet width fits the available installation space and matched indoor equipment.
• Fuel Compatibility – Ships configured for natural gas operation. Liquid propane conversion requires the appropriate optional conversion kit.
• Installation Configuration – Designed for upflow/horizontal installations when installed according to manufacturer guidelines.

NOx Regulation Notice

Please note that this furnace does not comply with Low NOx or Ultra-Low NOx regulations. If you have any questions, please contact us.

This furnace cannot be installed in Colorado or the following counties in California: Fresno, San Joaquin, Kern, Kings, Los Angeles, Madera, Merced, Orange, Riverside, San Bernardino, Stanislaus, Yolo, Tulare, San Diego, Ventura, Santa Barbara, San Luis Obsipo, Santa Clara, San Mateo, Alameda, Contra Costa, Marin, Sonoma, and Napa. In these areas you are required to purchase a Low NOx or Ultra-Low NOx furnace. If you have any questions, please contact us.