Goodman 80% AFUE 40K BTU Gas Furnace 14" Wide R32 Low NOx Upflow/Horizontal GR9S800403AX
The Goodman GR9S800403AX Low NOx gas furnace is designed for reliable heating, energy efficiency, and compliance with California Low NOx standards. With a 40,000 BTU capacity, this furnace is ideal for smaller homes, offering dependable comfort while helping reduce emissions and energy costs. Featuring a single-stage burner and a 9-speed ECM blower motor, it provides consistent heating performance and efficient airflow.
Key Features
- 40,000 BTU input / 32,000 BTU output – sized for smaller homes
- 80% AFUE efficiency rating – standard energy-efficient operation
- California Low NOx compliant (not approved in Ultra-Low NOx counties)
- Single-stage burner for straightforward, dependable performance
- 9-speed ECM blower motor for quiet and efficient airflow
- Durable aluminized steel heat exchanger for long-lasting reliability
- Hot surface ignitor – efficient and low-maintenance ignition system
- Self-diagnostic control board for simplified troubleshooting
- Heavy-gauge insulated steel cabinet reduces noise and heat loss
- Natural gas ready; convertible to propane with optional LP kit
- Requires metal flue venting (standard for 80% furnaces)
- Flexible installation – upflow or horizontal (right or left)
- 10-year parts warranty and lifetime heat exchanger warranty (with registration)
40,000 BTU Heating Power
With a heating input of 40,000 BTUs and 32,000 BTUs of output, the GR9S800403AX is perfectly suited for smaller homes in average climates, delivering consistent comfort and energy savings.
80% AFUE Efficiency
Operating at 80% AFUE, this furnace converts the majority of fuel into usable heat, venting through standard metal flue venting. It’s a cost-effective solution for homes that don’t require a high-efficiency condensing system.
Low NOx Compliance
The GR9S800403AX meets California Low NOx emission requirements, lowering environmental impact. It cannot, however, be installed in Ultra-Low NOx counties such as Los Angeles, Orange, Riverside, and San Bernardino.
Durable Construction
This model features a heavy-duty aluminized steel heat exchanger, rugged cabinet, and hot surface ignitor for reliable and long-lasting operation with reduced maintenance needs.
Warranty Protection
Goodman provides a 10-year parts warranty and a lifetime heat exchanger warranty when registered online and installed according to local codes.
Installation and Maintenance
Supports both upflow and horizontal configurations for flexibility. Color-coded low-voltage terminals simplify installation, and the self-diagnostic control board ensures fast servicing and troubleshooting.
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