General Electric nf96d045s3br Downflow Gas Furnace 45K Btu

Product Description

The General Electric nf96d045s3br is a single-stage downflow gas furnace rated at 96% AFUE and 45,000 BTU/h output. It is housed in a B-width cabinet, making it suitable for installations where horizontal space is limited. The 96% AFUE rating means the unit converts 96 cents of every fuel dollar into usable heat, reducing operating costs over the system lifetime. Licensed HVAC technicians install and commission this unit as part of a complete forced-air heating system. It is designed for residential and light-commercial applications requiring a downflow configuration.

This furnace is configured for downflow airflow, meaning supply air is discharged from the bottom of the cabinet into a floor-level duct system. This configuration is common in installations where the furnace sits above a crawl space or in an upper-floor utility closet feeding supply ducts running downward. The B cabinet designation describes the unit width, which determines compatibility with specific coil cabinets and return-air configurations. At 3-ton system capacity and 45,000 BTU/h heat output, this unit is sized for small to mid-size residential spaces.

Key Features

• 96% AFUE single-stage gas furnace for high-efficiency heating
• Downflow configuration for floor-discharge duct systems
• B cabinet width for space-constrained mechanical rooms and closets
• 45,000 BTU/h heating output suited for small to mid-size residential loads
• Single-stage operation with straightforward controls and serviceability

Compatibility

Designed as an OEM-style downflow gas furnace for residential forced-air heating systems requiring a B cabinet footprint and downflow airflow configuration.

Installation Notes

Installation must be performed by a licensed HVAC technician in accordance with the International Fuel Gas Code (IFGC), local mechanical codes, and the manufacturer installation manual. Shut off gas supply and disconnect electrical power before servicing or connecting any components. Proper venting must be installed per the manufacturer specifications and local code requirements for a 96% AFUE condensing furnace, which produces acidic condensate requiring a suitable drain. Do not attempt to modify the gas valve, burner assembly, or control board outside of manufacturer-approved procedures.

Technical Specifications

• AFUE: 96%
• Heating Output: 45,000 BTU/h
• System Capacity: 3 tons
• Configuration: Single-Stage Downflow
• Cabinet Size: B Cabinet

Standard Information

• Brand: General Electric
• Manufacturer Part Number: nf96d045s3br