Gas Furnace Comfort 96% AFUE 100000 BTU Single-Stage Multi-position 21-Inch-Wide Cabinet

The Gas Furnace Comfort 96% AFUE 100000 BTU Single-Stage Multi-position (59SC6A100M21--20) delivers a 100,000 BTU input with approximately 97,000 BTU output at 96% AFUE efficiency, engineered for versatile installation in upflow, downflow, or horizontal configurations. Its 21-wide cabinet (about 35 high - 29.5 deep) offers generous service access and ease of coil alignment in larger mechanical spaces. Equipped with a single-stage gas valve and a Multi-18-Speed Constant Torque (MCT) ECM blower motor, the unit provides smooth, quiet airflow and reliable comfort control. Operating on 115 V single-phase power, it draws roughly 11 A to 12 A and is designed for a 15 A circuit, and includes a ½ NPT gas connection factory-set for natural gas with field conversion available for propane. With its 4-way multipoise cabinet supporting direct-vent, single-pipe, or two-pipe venting options, durable aluminized-steel primary and stainless-steel secondary heat exchangers, and a certified temperature rise range of 35-65 °F, this Comfort Series furnace is built for efficient performance, flexible installation, and technician-friendly long-term service access.