Gas Furnace Comfort 95% AFUE 100000 BTU Single-Stage Multi-position 21-Inch-Wide Cabinet 59SC5B100E21--20

The Gas Furnace Comfort 95% AFUE 100,000 BTU Single-Stage Multi-Position (59SC5B100E21--20) delivers a 100,000 BTU input with approximately 95,000 BTU output at 95% efficiency, providing reliable, high-performance heating for mid- to large-size residential systems. Its 4-way multipoise cabinet supports upflow, downflow, or horizontal installation, offering maximum flexibility for varying system layouts. The 21-wide cabinet (35 high - 29 1/2" deep) allows smooth coil alignment and easy front service access for technicians. Operating on 115 V single-phase power, the furnace draws about 9.5 A and is protected by a 15 A circuit. A constant-torque ECM blower motor ensures quiet, energy-efficient airflow, while the single-stage gas valve delivers steady, dependable heat output. The 1/2" NPT gas connection is factory-set for natural gas and field-convertible to propane, and the unit supports both direct-vent and single-pipe venting configurations. With aluminized-steel primary and stainless-steel secondary heat exchangers, a certified temperature rise range of 35-65 °F, and durable construction, this furnace combines efficient performance, long-term reliability, and technician-friendly installation and service access.