Goodman 80% AFUE Gas Furnace Nine Speed ECM, Two Stage, Upflow/Horizontal, 40000 BTUH/H

Compact Two-Stage Performance with the Goodman GR9T800403AN Gas Furnace

The Goodman GR9T800403AN is a 40,000 BTU, 80% AFUE two-stage gas furnace designed for smaller residential spaces. Its compact size, quiet operation, and advanced airflow control make it an ideal choice for energy-efficient home heating in tight installations.

Key Features:

Two-stage gas valve operates primarily in low stage for improved comfort and efficiency, switching to high stage only when needed

9-speed ECM blower motor adjusts airflow to meet your home’s heating demands while conserving energy

Aluminized steel tubular heat exchanger ensures effective heat transfer and long-term durability

Compact 14-inch cabinet fits tight installations, making it ideal for closets, alcoves, or small utility rooms

Self-diagnostic control board continuously monitors system performance and simplifies troubleshooting

Insulated cabinet reduces operating noise and helps prevent air leakage

Supports both upflow and horizontal airflow configurations for installation flexibility

Specifications:

Heating capacity 40,000 BTU/h

AFUE 80%

Fuel type Natural Gas (convertible to LP with optional kit)

Blower motor 9-speed ECM

Airflow configuration Upflow or horizontal

Cabinet width 14 inches

Dimensions (W x D x H) 14 x 28 x 33.38 inches

Voltage 115 V, 1 Phase, 60 Hz

Minimum circuit ampacity 7.7 A

Maximum overcurrent protection 15 A

Approximate weight 105 lbs

Warranty:

Lifetime limited warranty on the heat exchanger

10-year limited parts warranty with online registration

The Goodman GR9T800403AN delivers high-efficiency, two-stage heating in a compact and quiet design—perfect for smaller homes that still demand powerful performance and comfort.