Gas Furnace Comfort 80% AFUE 45000 BTU Single-Stage Multi-position 17.5-Inch-Wide Cabinet

The Gas Furnace Comfort 80% AFUE 45000 BTU Single-Stage Multi-position (58SB0B045M17--14) delivers an 80% AFUE efficiency rating with 45,000 BTU input and approximately 36,000 BTU output (per variant size), built for flexible installation in up-flow, down-flow, or horizontal positions. The 17.5-inch wide cabinet (17.5 actual) enhances airflow space and eases coil access in tight mechanical rooms. It uses a Multi-18-Speed Constant Torque (MCT) ECM blower motor for quiet, efficient operation and adjustable airflow. Electrical requirements are 115 V, single-phase with full-load amps around 10.7 A (unit ampacity 11 A) and a recommended 15 A circuit. The gas connection is ½ NPT and venting supports 13 configurations in a 4-way multipoise design, and the aluminized-steel primary heat exchanger ensures durability and serviceability. Temperature rise range is adjustable from 30-60 °F and the unit operates at a certified external static pressure of 0.15 in w.c. in heating mode.