GD9T800403AX 40,000 BTU 80% AFUE 9-Speed Two Stage Low NOx Goodman Gas Furnace - Downflow/Horizontal

40,000 BTU
The GD9T800403AX Goodman gas furnace is 40,000 BTU’s. This BTU count is a measure of the input of the furnace per hour, while the output of this furnace is 32,000 BTU’s (40,000 X 80% AFUE) per hour. In ideal climate conditions, this 40,000 BTU furnace is usually used to heat a medium house.

80% Efficiency Rating
The GD9T800403AX Goodman gas furnace is 80% efficient, and the standard furnace efficiency on the market today. This means that 80% of the gas going into the furnace is used to heat your home and the remaining 20% is lost out of the flue venting. Please note that all 80% furnaces must be vented using metal flue venting, while anything higher than 90% efficient must be vented using plastic/PVC venting.

Two Stage Furnace
The GD9T800403AX Goodman gas furnace is a two stage furnace that has two heating outputs on the burner: full output on colder winter days and a lower output for milder days that the furnace doesn’t have to run quite as much. Two stage furnaces allow for a more even heat distribution, as the furnace will only kick on the higher stage if the indoor temperature is more than a few degrees away from the desired temperature. Since the lower stage will be used more often, the GD9T800403AX will run quieter than a single stage system. While the majority of the benefits of a two stage feature on a furnace are comfort based, the efficiency of the furnace is slightly higher due to it burning less fuel at its lower stage.

Natural Gas or LP Furnace
From the factory, the GD9T800403AX runs on natural gas. However all Goodman gas furnaces can be converted to propane using the furnace’s corresponding LP conversion kit, an optional accessory at an additional cost that consists of a replacement set of orifices and springs.

9-Speed ECM Blower Motor
Instead of the last generation PSC blower motor, the GD9T800403AX utilizes a 9-speed ECM motor, which uses less power and provides smarter air circulation. All of this causes an overall increase in the electrical efficiency of your furnace, which saves you money.

Goodman Furnace Warranty
With installation that follows your state and local codes and with online registration, all Goodman furnaces come with a 10-year parts and lifetime heat exchanger warranty through the manufacturer.

Durable Hot Surface Igniter
The hot surface igniter on modern Goodman furnaces are more durable than previous designs, decreasing related issues and lowering maintenance costs. These hot surface ignitors are also more efficient than standing pilot and older HSI designs, saving you even more money.

Self-Diagnostic Control Board
The Goodman brand has improved technology from years of production experience, allowing for a long-lasting product that rarely has any issues. However, if something does go wrong on the furnace, the control board has a set of sensors that allow it to diagnose basic issues, allowing for easy troubleshooting and to notify the owner if basic maintenance or warranty work is recommended. This increases the overall safety of the unit, for the furnace itself and the occupants of the home where it is installed.

Heavy Gauge Steel Cabinet
The heavy-gauge steel cabinet on new Goodman furnaces provide adequate protection to the internal mechanisms of the unit. The cabinet is also more air-tight than previous models, allowing for a quiet, more economical unit due to losing less heat and preventing more sound from exiting the unit.

Ease of Installation
The value of modern Goodman furnaces doesn't end at efficiency. Today’s Goodman furnaces feature many different connection options to reduce installation. The GM9C800403AN model has a more universal design, which consists of its ability to be installed in both an downflow or horizontal configuration. This allows for an easier installation in more locations, from your attic to your basement. The furnace also comes with color-coded low-voltage terminals that allow for a shorter and easier installation time, which decreases installation costs.