Trane A801X120DM5SC Single-stage Gas Furnace 120000 Btu/h 80% Afue Upflow Downflow Horizontal

Product Description

The Trane A801X120DM5SC is a single-stage, 80% AFUE induced-draft gas furnace rated at 120,000 BTU/h input. It is designed for residential and light-commercial forced-air heating systems and supports upflow, downflow, and horizontal left or right installations. The unit features an integrated furnace control board with a digital display, setup and diagnostic capability, and storage of the last six fault codes for simplified troubleshooting. Cabinet width is 24.5 inches, with a depth of approximately 28 inches, conforming to industry-standard dimensions. All connections use Molex-style plugs, eliminating spade terminals. Licensed HVAC technicians perform installation and service on this furnace.

The A801X120DM5SC suits residential and light-commercial applications requiring high-capacity heating in a versatile multi-position cabinet. The 24.5-inch-wide cabinet is compatible with industry-standard evaporator coils and accessory components, making it a practical fit for new-construction and replacement projects alike. The open vestibule design provides 34 inches of clear working height, improving access during installation and annual maintenance. The air-tight cabinet meets ASHRAE 193 standards, with 1.4% or less air leakage, supporting system efficiency and indoor air quality goals.

Key Features

• 120,000 BTU/h input capacity with 80% AFUE single-stage heating
• Multi-position installation: upflow, downflow, and horizontal left or right
• Integrated furnace control with digital display, diagnostics, and last-six-error recall
• Air-tight cabinet rated at 1.4% or less air leakage per ASHRAE 193
• 34-inch open vestibule for improved installation and service access
• 24.5-inch cabinet width compatible with industry-standard coils and accessories
• All Molex connections — no spade terminals for cleaner, more reliable wiring

Compatibility

Designed as an OEM-style single-stage gas furnace replacement or new-installation unit compatible with industry-standard 24.5-inch-wide coil and accessory configurations in residential and light-commercial forced-air systems.

Installation Notes

Installation must be performed by a licensed HVAC technician in accordance with local codes and the manufacturer instructions. Shut off the gas supply and disconnect electrical power at the breaker before any service or installation work. This furnace must be connected to a properly sized flue venting system per IFGC requirements for induced-draft 80% AFUE appliances. Do not operate the unit without all panels secured and the flue connection verified for gas-tight integrity.

Technical Specifications

• Heating Input Capacity: 120,000 BTU/h
• AFUE: 80%
• Number of Heating Stages: Single-stage
• Installation Positions: Upflow, Downflow, Horizontal Left, Horizontal Right
• Cabinet Width: 24.5 inches
• Cabinet Depth: Approximately 28 inches
• Vestibule Height (open): 34 inches
• Air Leakage: 1.4% or less per ASHRAE 193
• Ignition Type: Hot Surface Ignition
• Control Board: Integrated with digital display and diagnostics

Standard Information

• Brand: Trane
• Manufacturer Part Number: A801X120DM5SC