
Goodman - 40,000 BTU - Furnace - 80% AFUE - Upflow/Horizontal - Multi-Speed GMS80403AN
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Fuel Type To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
Natural Gas
Vent Type
Products that use combustion (burning) of fuel to create heat also create potentially dangerous gasses that need to be exhausted (AKA "Vented"). Depending on the product, venting can be done via a chimney, through a side wall, or use a second vent to provide fresh air to the appliance.

Chimney Vent
Modulating/Staging
Stages are unique speeds or levels that equipment can operate at. More stages allow for better fine-tuned control of output, which improves comfort and efficiency. Modulating equipment can operate across a range of levels, giving the highest level of fine-tuned control. Learn More

Single Stage
Blower Type
Blower type describes the motor that powers the fan in the unit. PSC multi-speed is the standard motor that operates with pre-set fan speed levels. ECM multi-speed are more efficient but still operate with pre-set fan speeds. Finally, ECM variable-speed motors are also energy efficient and automatically adjust to changing system conditions.

PSC Multi-Speed
Orientation describes the direction that air will flow through a piece of equipment. (e.g. air will flow horizontally through a "Horizontal" unit heater.) Most equipment will only function properly if installed in the proper orientation.
Upflow/Horizontal
Model
GMS80403AN
Performance
Nominal Heating Capacity
40000 BTU
High Fire Input
40000 BTU
High Fire Output
32000 BTU
AFUE AFUE (Annual Fuel Utilization Efficiency) measures the efficiency of combustion equipment over the entire heating season, and is calculated by dividing the amount of energy that is actually heating your home by the total energy contained in the fuel used by the boiler/furnace. Learn More
80 %
Maximum Air Flow
1200 CFM
Electrical Data
Voltage
115 Volts
Phase
1
Frequency
60 Hz
Minimum Circuit Ampacity
8.1 Amps
Recommended Breaker Size
15 Amps