Gas Furnace Infinity 97% AFUE 100000 BTU Two-Stage Multi-position 21-Inch-Wide Cabinet

The Gas Furnace Infinity 97% AFUE 100000 BTU Two-Stage Multi-position (59TN7A100C21--22) delivers a 100,000 BTU input at up to 97% AFUE efficiency, designed for reliable comfort and flexible placement in up-flow, down-flow, or horizontal orientations. Its 21-wide cabinet (approximately 35 high - 29.5 deep) provides ample service access and installation versatility. Featuring a two-stage gas valve and a variable-speed constant-airflow ECM blower motor, the furnace offers smoother transitions between heat stages, quieter operation, and enhanced humidity control when paired with compatible Comfort communicating controls. This unit is designed for 115 V single-phase power, with a unit ampacity around 12-13 A on a 20 A circuit, and includes a ½ NPT gas connection factory-set for natural gas and field-convertible to propane. With its 4-way multipoise design supporting up to 13 venting configurations, durable aluminized-steel primary plus stainless-steel secondary heat exchangers, and certified temperature rise range of 35-65 °F, this Comfort Series furnace is built for technician-friendly service, dependable performance, and long-term installation flexibility.