General Electric nf80u045t3ar Gas Furnace 45000 Btu/h 80 Afue

Product Description

The GENERAL ELECTRIC nf80u045t3ar is a two-stage, upflow and horizontal-flow natural gas furnace rated at 45,000 BTU/h output and 80 percent AFUE. Two-stage operation means the burner runs at a reduced firing rate during mild conditions and steps up to full capacity when the load demands it, improving comfort and reducing short-cycling. The A cabinet designation indicates a specific cabinet width class used in equipment selection and duct matching. This unit is installed by licensed HVAC technicians in residential forced-air heating systems where space, duct layout, or regional efficiency standards allow an 80 percent AFUE appliance.

The nf80u045t3ar suits residential applications where upflow or horizontal airflow configurations are required. Upflow installations are common in basement or closet settings where supply air rises into overhead ductwork, while horizontal configurations fit attic or crawlspace installs with side-to-side airflow. The 3-ton nominal cooling coil capacity rating means this furnace is matched to a 3-ton cooling system when used as part of a split system. The A cabinet width fits duct openings and air handler enclosures sized for that cabinet class.

Key Features

• Two-stage burner operation reduces short-cycling and improves temperature consistency
• 80 percent AFUE efficiency rating meets minimum federal efficiency standards for most U.S. climate regions
• 45,000 BTU/h heating output suited for smaller residential spaces
• Upflow and horizontal airflow configurations in a single unit for flexible installation
• A cabinet sizing simplifies duct and coil matching during equipment selection
• Nominal 3-ton cooling coil compatibility supports split-system pairing

Compatibility

Designed as an OEM-style residential gas furnace for upflow and horizontal-flow forced-air heating systems requiring an A cabinet width and 45,000 BTU/h capacity at 80 percent AFUE.

Installation Notes

Installation must be performed by a licensed HVAC contractor in accordance with the National Fuel Gas Code (NFPA 54), local mechanical codes, and the manufacturer installation instructions. Shut off gas supply and disconnect electrical power before any service work. Verify flue venting meets B-vent or equivalent requirements for 80 percent non-condensing appliances, and confirm gas line sizing, supply pressure, and manifold pressure comply with rated specifications before commissioning. Do not attempt to convert fuel type or alter factory burner settings without manufacturer-approved conversion kit documentation.

Technical Specifications

• Heating Output: 45,000 BTU/h
• AFUE: 80 percent
• Stage Configuration: Two-stage
• Airflow Configuration: Upflow and Horizontal
• Nominal Cooling Capacity: 3 tons
• Cabinet Size: A Cabinet

Standard Information

• Brand: GENERAL ELECTRIC
• Manufacturer Part Number: nf80u045t3ar