Gas Furnace Preferred 80% AFUE 135000 BTU Two-Stage Variable-Speed Multi-position 24.5-Inch-Wide Cabinet

The Gas Furnace Preferred 80% AFUE 135,000 BTU Two-Stage Variable-Speed Multi-Position (820TB66135V24) delivers robust, high-capacity heating with an 80% AFUE efficiency rating and a normalized 135,000 BTU input, ideal for large residential or light commercial applications. This two-stage furnace features a variable-speed ECM blower motor that provides precise airflow control, quieter operation, and enhanced temperature consistency across both stages. The 24.5-Inch-Wide cabinet (approximately 33 1/2" high - 29 deep) supports upflow, downflow, or horizontal installation through a full 4-way multipoise configuration, offering installation flexibility for diverse jobsite needs. Operating on 115 V single-phase power, the unit includes a 1/2" NPT gas connection field-convertible for natural gas or propane and supports up to 2,200 CFM nominal airflow. Certified for a temperature rise range of 40-70 °F and a maximum external static pressure of 0.15 in. w.c., this model accommodates up to 13 venting configurations for sealed or ventilated combustion air. With advanced features like Perfect Heat adaptive control, Fan On Plus continuous fan option, QuietGuard insulated cabinet design, and technician-friendly service access, the 820TB66135V24 offers reliable, flexible, and professional-grade per(more...)