General Electric nf80d070s3b Downflow Gas Furnace 70K Btu

Product Description

The GENERAL ELECTRIC nf80d070s3b is a single-stage, downflow natural gas furnace rated at 70,000 BTU/h output and 80% AFUE. It is built in a B-cabinet configuration, making it suitable for installations where a downflow discharge orientation is required. The 80% AFUE rating means 80 cents of every fuel dollar is converted to usable heat. Single-stage operation delivers consistent heat output at full capacity whenever the thermostat calls for heat. Licensed HVAC technicians install and commission this unit in residential or light commercial settings.

This furnace is designed for downflow applications where the supply air is discharged through the bottom of the cabinet and into a floor-level or under-floor duct system. The B-cabinet sizing fits standard furnace closets and alcoves dimensioned for mid-capacity residential heating equipment. It is intended for use in natural gas systems and pairs with a standard single-stage thermostat. This unit is a practical choice for replacing aging downflow furnaces in existing duct layouts that require bottom-discharge airflow.

Key Features

• 80% AFUE efficiency rating for reliable, code-compliant heating performance
• 70,000 BTU/h heating capacity suited for mid-size residential applications
• Single-stage gas valve provides straightforward, consistent heat delivery
• Downflow discharge orientation for compatibility with floor and crawlspace duct systems
• B-cabinet configuration fits standard residential furnace enclosures

Compatibility

Designed as an OEM-style downflow gas furnace replacement for residential heating systems requiring a B-cabinet, bottom-discharge configuration with a single-stage control circuit.

Installation Notes

Installation must be performed by a licensed HVAC technician in accordance with local mechanical codes and the International Fuel Gas Code (IFGC). Shut off the gas supply and disconnect electrical power before beginning any work on the existing system. Verify that the existing venting, gas line sizing, and duct static pressure are appropriate for this unit before completing the installation. Do not operate the furnace without confirming proper flue venting and gas leak testing at all connections.

Technical Specifications

• Heating Capacity: 70,000 BTU/h
• AFUE: 80%
• Stage Configuration: Single Stage
• Airflow Orientation: Downflow
• Cabinet Size: B Cabinet
• Fuel Type: Natural Gas

Standard Information

• Brand: GENERAL ELECTRIC
• Manufacturer Part Number: nf80d070s3b