Gas Furnace Preferred 80% AFUE 45000 BTU Two-Stage Variable-Speed Multi-position 14.2-Inch-Wide Cabinet

The Gas Furnace Preferred 80% AFUE 45,000 BTU Two-Stage Variable-Speed Multi-Position (820TB36045V14) delivers dependable two-stage performance with an 80% AFUE rating and a normalized 45,000 BTU input, designed for flexible installation and quiet operation. It features a two-stage gas valve and a variable-speed ECM blower motor that adjusts airflow for consistent comfort and high efficiency. The 14.2-wide cabinet (approximately 33 1/2" high - 29 deep) supports upflow, downflow, or horizontal installation within a full 4-way multipoise configuration. Operating on 115 V single-phase power, this furnace includes a 1/2" NPT gas connection field-convertible for natural gas or propane and supports nominal airflow around 1,200 CFM. Certified for a temperature rise range of 30-60 °F with a maximum external static pressure of 0.12 in. w.c., the unit accommodates up to 13 venting configurations including sealed or ventilated combustion air. With Perfect Heat adaptive control, Fan On Plus continuous fan capability, QuietGuard cabinet insulation, and technician-friendly access, the 820TB36045V14.2 provides reliable performance, simplified service, and installation flexibility for professional HVAC applications.