Gas Furnace Legacy 80% AFUE 45000 BTU Single-Stage Multi-position 14.2-Inch-Wide Cabinet

The Gas Furnace Legacy 80% AFUE 45,000 BTU Single-Stage Multi-Position (800SB36045M14) delivers dependable heating performance with an 80% AFUE efficiency and a normalized 45,000 BTU input. It features a single-stage gas valve and a Multi-18-Speed constant-torque ECM blower motor for smooth, efficient airflow and quiet operation. Designed for upflow, downflow, or horizontal installation, the compact cabinet measures approximately 14.2 wide - 33 1/2" high - 29 deep and supports full 4-way multipoise configuration for maximum flexibility in tight mechanical spaces. Operating on 115 V single-phase power with a 1/2" NPT gas connection, this model is field-convertible for natural gas or propane and supports up to 1,200 CFM nominal airflow. Certified for a temperature rise range of 30-60 °F and compatible with up to 13 venting configurations, the 800SB36045M14.2 incorporates QuieTech sound reduction and PerfectLight hot surface ignition, giving HVAC technicians a reliable, easy-to-service furnace built for lasting performance.