Gas Furnace Comfort 80% AFUE 90000 BTU Single-Stage Multi-position 17.5-Inch-Wide Cabinet

The Gas Furnace Comfort 80% AFUE 90000 BTU Single-Stage Multi-position (58SB0B090M17--14) is designed for large-capacity residential applications and offers 90,000 BTU input with an 80% AFUE efficiency rating. Its 17.5-wide cabinet provides generous room for airflow and service access while supporting flexible up-flow, down-flow or horizontal installation configurations. Equipped with a Multi-18-Speed Constant Torque (MCT) ECM blower motor, this unit delivers quiet, efficient airflow and easy tuning at installation. Operating on 115 V single-phase electrical service, in many installations the unit ampacity is around 11 A with a recommended 15 A circuit. The furnace features a 4-way multi-poise venting design with up to 13 vent configurations, a ½ NPT gas connection adaptable for natural or propane gas, and a compact height of approximately 33.3 for tight-space mechanical rooms. Service-friendly diagnostics include a microprocessor-based control board with status display and NFC setup ready. With its durable aluminized-steel primary heat exchanger, multi-position flexibility and technician-friendly installation touchpoints, this furnace delivers reliable, high-capacity heating performance for demanding jobs.