Trane S8X2A040M3PSC 40,000 BTU Two Stage 80% Efficiency Non-Condensing Gas Fired Furnace

Trane S8X2A040M3PSC – 40,000 BTU Two-Stage 80% AFUE Upflow / Downflow / Horizontal Gas Furnace

Deliver reliable residential heating with the Trane S8X2A040M3PSC, a 40,000 BTU two-stage gas furnace designed for consistent comfort, efficient airflow, and flexible installation. Part of Trane’s S-Series furnace platform, this model features a durable aluminized steel heat exchanger, a 9-speed constant torque ECM blower motor, and an integrated furnace control system engineered to provide dependable heating performance and simplified diagnostics for residential HVAC systems.

Two-Stage Gas Heating Performance
The S8X2A040M3PSC utilizes a two-stage gas heating system designed to improve comfort and efficiency. The furnace provides approximately 26,000 BTU input in first stage and 40,000 BTU input in second stage, with corresponding heating capacities of approximately 20,900 BTU and 32,200 BTU. This staged operation allows for longer, quieter heating cycles at lower output while delivering full heating capacity during higher demand conditions.

80% AFUE Non-Condensing Efficiency
With an AFUE rating of 80%, this furnace is designed to deliver reliable heating performance while maintaining standard efficiency for non-condensing systems. The system balances performance and cost-effective operation for residential applications.

9-Speed Constant Torque ECM Blower Motor
Airflow is delivered through a direct-drive blower assembly powered by a 9-speed constant torque ECM blower motor rated at approximately 1/2 horsepower and operating around 1050 RPM. This system provides consistent airflow and adjusts to meet heating and cooling demands while maintaining efficient electrical consumption.

Durable Aluminized Steel Heat Exchanger
The furnace utilizes a heavy gauge tubular aluminized steel heat exchanger designed for durability and efficient heat transfer. This construction supports consistent heating performance and long-term reliability across repeated heating cycles.

Multiport Inshot Burners with Silicon Nitride Ignition
The heating system features multiport inshot burners designed for quiet and efficient combustion. Ignition is provided by a 120V silicon nitride hot surface igniter, eliminating the need for a standing pilot and improving ignition reliability. The system uses two burners to distribute heat effectively during operation.

Integrated Furnace Control with Diagnostic Capabilities
An integrated solid-state control continuously monitors furnace operation including flame sensing, airflow, and safety limits. The system includes built-in self-diagnostics and stores recent fault codes to assist with troubleshooting and service, simplifying maintenance and system monitoring.

Flexible Multi-Position Installation Design
The S8X2A040M3PSC furnace features a four-way multi-poise cabinet design that supports upflow, downflow, horizontal left, and horizontal right installation. This flexibility allows installation in closets, basements, attics, or mechanical rooms depending on system layout.

Compact Cabinet Design for Residential Applications
The furnace uses a compact cabinet measuring approximately 34 inches high, 14.5 inches wide, and 28.75 inches deep. Its space-saving footprint allows installation in tighter mechanical areas while maintaining compatibility with standard HVAC components and accessories.

Engineered for Reliable Residential Heating
Ideal for residential forced-air systems, the Trane S8X2A040M3PSC gas furnace combines two-stage heating performance, efficient ECM airflow technology, and durable construction in a non-condensing platform designed to deliver consistent comfort, dependable operation, and long-term reliability.