Trane S9V2B040U3VSBA 40,000 BTU Two-Stage Condensing Gas Furnace

Trane S9V2B040U3VSBB – 40,000 BTU/H Two-Stage Condensing Gas Furnace

Deliver efficient, compact, and dependable home heating with the Trane S9V2B040U3VSBB, a 40,000 BTU/H input two-stage condensing gas furnace designed for upflow installation and convertible to horizontal left or right configurations. Part of Trane’s advanced S-Series platform, this furnace combines high-efficiency performance, variable-speed airflow, and durable stainless steel heat exchanger construction for consistent comfort in residential applications.

Two-Stage High-Efficiency Heating Performance
The S9V2B040U3VSBB provides precise two-stage heating output for improved comfort and reduced temperature swings. It delivers 26,000 BTU/H input in first stage with 25,700 BTU/H heating capacity (ICS), and ramps up to 40,000 BTU/H input in second stage with 39,350 BTU/H capacity. With an impressive 97.0% AFUE rating, this furnace is engineered to maximize fuel savings while maintaining reliable warmth throughout the heating season.

Variable-Speed Air Delivery for Enhanced Comfort
Equipped with a variable-speed blower motor (1/2 HP), this model automatically adjusts airflow to match heating and cooling demands. The furnace is designed to deliver at least 400 CFM per ton at 0.5 in. w.c. external static pressure, with setup options down to 290 CFM/ton, supporting a wide range of duct configurations and indoor comfort requirements.

Durable Stainless Steel Heat Exchanger Design
The S9V2B furnace platform utilizes a fired 409 stainless steel primary heat exchanger and a 29-4C™ stainless steel secondary heat exchanger. This dual stainless steel construction improves corrosion resistance, enhances long-term durability, and allows the furnace to reclaim additional heat from flue gases that would normally be lost.

Flexible Multi-Position Installation & Venting
Designed as a true multi-poise furnace, the S9V2B040U3VSBB is shipped ready for upflow installation and can be converted to horizontal left or right without special kits. It features a minimum 2-inch round vent outlet and supports multiple venting options for installation flexibility in tight mechanical spaces.

The compact cabinet measures just 34" H × 17.5" W × 28.75" D (uncrated) and weighs only 114 lbs net, making it ideal for basements, closets, and space-constrained applications.

Quiet, Safe, and Reliable Operation
This furnace is certified by Intertek/ETL for both natural gas and propane operation and includes multiport inshot burners, a redundant two-stage gas valve, and a 120V silicon nitride hot surface igniter. The integrated furnace control continuously monitors flame presence and system performance while providing self-diagnostics and stored fault history for easier service and long-term reliability.

Energy Star® Certified Efficiency
With a 97.0% AFUE rating across all models, the S9V2B series meets Energy Star® requirements and is designed to qualify for utility rebates while lowering overall heating costs. Its airtight construction limits air leakage to 1% or less of nominal delivered airflow when pressurized, supporting both efficiency and performance standards.

Engineered for Compact High-Efficiency Home Heating
Purpose-built for homeowners seeking efficient heating in smaller spaces, the Trane S9V2B040U3VSBB combines two-stage comfort control, variable-speed airflow, and durable stainless steel heat exchanger performance in a compact 34-inch cabinet. Ideal for high-efficiency residential systems, this S-Series furnace delivers reliable warmth, energy savings, and flexible installation options for modern home comfort.