Trane A952V040BU3SB Gas Furnace 40000 Btu 96% Afue Variable Speed Two Stage Upflow Horizontal

Product Description

The Trane A952V040BU3SB is a 40,000 BTU input, two-stage, variable-speed residential gas furnace rated at 96% AFUE. It operates in upflow, horizontal-left, and horizontal-right orientations, making it adaptable to a range of installation configurations. The variable-speed ECM blower motor modulates airflow to match heating demand, improving comfort and reducing energy consumption compared to single-speed units. Two-stage gas valve operation allows the furnace to run at a lower firing rate during moderate demand, reducing short-cycling and improving temperature consistency. Licensed HVAC technicians typically handle installation and startup of this unit.

The A952V040BU3SB is sized for smaller residential applications where a lower input capacity is appropriate. Its 17.5-inch cabinet width fits standard alcove and closet installations. The upflow and horizontal configurations make it suitable for attic, basement, utility closet, and crawlspace setups depending on duct orientation. It uses 24-volt low-voltage control wiring and is compatible with standard communicating or conventional thermostat systems. Nominal airflow is 1,200 CFM. The unit is part of the RunTru by Trane product line.

Key Features

• 96% AFUE efficiency rating reduces fuel consumption in residential heating applications
• Two-stage gas valve lowers firing rate during mild conditions, reducing short-cycling
• Variable-speed ECM blower motor adjusts airflow for consistent comfort and quieter operation
• Upflow, horizontal-left, and horizontal-right orientations supported from one cabinet
• 17.5-inch cabinet width fits standard residential furnace openings
• 24-volt control circuit compatible with conventional and programmable thermostat wiring

Compatibility

The A952V040BU3SB has been listed as a component in split dual-fuel system configurations paired with compatible heat pump and evaporator coil products. Confirm compatibility with the specific coil, heat pump, and thermostat before ordering. Designed for residential upflow and horizontal gas furnace applications.

Installation Notes

Installation must be performed by a licensed HVAC technician in accordance with local codes, the National Fuel Gas Code (NFPA 54), and the manufacturer installer guide. Shut off gas supply and disconnect electrical power before any service work. Condensate drainage, venting, and gas piping connections must comply with applicable local mechanical and fuel gas codes. Do not operate the unit without proper venting installed and verified.

Technical Specifications

• Input Capacity: 40,000 BTU/h
• AFUE: 96%
• Stages: 2
• Blower Motor Type: Variable Speed ECM
• Nominal Airflow: 1,200 CFM
• Control Voltage: 24 volts
• Cabinet Width: 17.5 inches
• Cabinet Depth: 28.75 inches
• Cabinet Height: 34 inches
• Orientation: Upflow, Horizontal Left, Horizontal Right
• Product Line: RunTru by Trane

Standard Information

• Brand: Trane
• Manufacturer Part Number: A952V040BU3SB