Gas Furnace Comfort 80% AFUE 70000 BTU Single-Stage Multi-position 17.5-Inch-Wide Cabinet

The Gas Furnace Comfort 80% AFUE 70000 BTU Single-Stage Multi-position (58SB0B070M17--12) delivers reliable, efficient heating with a 70,000 BTU input at 80% AFUE, suited for up-flow, down-flow or horizontal installations. Its 17.5-wide cabinet (17.5 actual: width) offers ample space for service access in mechanical rooms and works well in footprint-challenged layouts. Equipped with a Multi-18-Speed Constant Torque (MCT) ECM blower motor, this unit ensures smooth, adjustable airflow across changing load conditions. The 115 V single-phase power supply and approximately 8.3 A unit ampacity make it compatible with typical residential electrical circuits; the factory ½ NPT gas connection supports natural or converted propane service. Featuring a 4-way multipoise design with up to 13 venting configurations, an aluminized-steel heat-exchanger and a certified temperature-rise range of 30-60 °F, this furnace offers dependable performance, flexible installation, and technician-friendly servicing.