Trane A952V040BD3SA Two Stage Variable Speed Downflow Gas Furnace 40000 Btu 96% Afue

Product Description

The Trane A952V040BD3SA is a two-stage, variable-speed, downflow condensing gas furnace rated at 40,000 BTU/h input and 96% AFUE. It operates in a B-size cabinet measuring 17.5 inches wide and is designed for downflow-only installations. The two-stage gas valve delivers a first-stage input of 26,000 BTU/h and a second-stage input of 40,000 BTU/h, allowing the system to run at lower capacity during mild conditions and ramp up when the load demands it. A variable-speed ECM blower motor adjusts airflow continuously to match system demand, improving comfort and reducing operating noise. Licensed HVAC technicians install and commission this unit.

The A952V040BD3SA is suited for residential downflow applications where the supply air discharges through the bottom of the cabinet into a floor plenum or basement duct system. The 17.5-inch cabinet width fits standard B-size platform installations. It is part of the RunTru by Trane RT Series and is designed for natural gas service. This unit has been listed as a compatible component in split-system configurations alongside matched air conditioning equipment using R454B refrigerant, making it appropriate for new installations requiring current refrigerant compliance.

Key Features

• Two-stage operation: 26,000 BTU/h first stage and 40,000 BTU/h second stage input for load-matched heating
• 96% AFUE condensing efficiency for high-efficiency natural gas heating
• Variable-speed ECM blower motor for quiet, efficient airflow management
• Downflow-only cabinet configuration with 17.5-inch width for B-size platform fit
• 24-volt low-voltage control circuit compatible with standard thermostat wiring
• Certified to ANSI Z21.47 / CSA 2.3 for natural gas and LP gas applications

Compatibility

The A952V040BD3SA has been documented as a compatible furnace component in split-system configurations paired with the A5AC3036A1 condensing unit and the 5MXCB004AC6HCA coil using R454B refrigerant. It is listed under model designation A952V040BD3SAC/D in manufacturer submittal documentation.

Installation Notes

Installation must be performed by a licensed HVAC technician in accordance with local mechanical codes and the National Fuel Gas Code (NFPA 54 / ANSI Z223.1). Shut off the gas supply and disconnect electrical power at the disconnect or breaker before beginning any service or installation work. This unit is rated for downflow orientation only and must not be installed in upflow or horizontal configurations. Follow the manufacturer installation instructions for venting, condensate drainage, and electrical connections before commissioning the system.

Technical Specifications

• Input Capacity (2nd Stage): 40,000 BTU/h
• Input Capacity (1st Stage): 26,000 BTU/h
• Output Capacity (2nd Stage, ICS): 38,850 BTU/h
• Output Capacity (1st Stage, ICS): 25,300 BTU/h
• AFUE: 96%
• Stages: Two Stage
• Blower Motor Type: Variable Speed ECM
• Airflow Configuration: Downflow Only
• Cabinet Width: 17.5 inches
• Cabinet Depth: 28.75 inches
• Electrical Supply: 120V / 1-phase / 60 Hz
• Control Voltage: 24 volts
• Fuel Type: Natural Gas (LP convertible per ANSI Z21.47 / CSA 2.3)
• Vent Configuration: Direct Vent Condensing
• Series: RunTru by Trane RT Series

Standard Information

• Brand: Trane
• Manufacturer Part Number: A952V040BD3SA