Gas Furnace Legacy 80% AFUE 135000 BTU Single-Stage Multi-position 24.5-Inch-Wide Cabinet

The Gas Furnace Legacy 80% AFUE 135000 BTU Single-Stage Multi-position 24.5-Inch-Wide Cabinet (800SB60135M24) offers robust, high-capacity heating performance with an 80% AFUE rating and a normalized 135,000 BTU input. It features a single-stage gas valve paired with a Multi-18-Speed constant-torque ECM blower motor, designed to support upflow, downflow or horizontal installation via its full 4-way multipoise cabinet that measures approximately 24.5 inch wide - 33 1/4 high - 29 deep. Operating on 115 V single-phase power and equipped with a ½ NPT gas connection field-convertible for natural gas or propane, this model supports up to ~2,000 CFM nominal airflow and is certified for a temperature rise range of 40-70 °F with approved external static pressures per manufacturer installation data. The unit includes 13 approved venting configurations (sealed-combustion or ventilated-combustion-air setups), features the QuieTech noise-reduction system and inner-door sealing for improved sound and tightness, and offers service-friendly diagnostics and accessibility tailored for professional HVAC installation and maintenance.