Gas Furnace Comfort 80% AFUE 110000 BTU Single-Stage Multi-position 21-Inch-Wide Cabinet

The Gas Furnace Comfort 80% AFUE 110,000 BTU Single-Stage Multi-Position (58SB0B110M21--20) delivers 110,000 BTU input at 80% efficiency, designed for versatile installation in upflow, downflow, or horizontal positions. Its 21-wide cabinet provides generous airflow capacity and easy service access while maintaining a compact footprint. Equipped with a Multi-18-Speed Constant Torque (MCT) ECM blower motor and a microprocessor control board featuring built-in diagnostics and NFC setup capability, this furnace ensures smooth airflow adjustment and simplified service. Operating on 115 V single-phase electrical power, it draws approximately 11-13 A with a recommended 15-20 A circuit and features a 1/2 NPT gas connection for natural gas or propane conversion. The aluminized-steel heat exchanger ensures lasting durability, while up to 13 venting configurations and a certified temperature rise range of 40-70 °F make this model adaptable for a wide variety of residential applications.