General Electric nf97d070m3b Gas Furnace 70000 Btu/h 97% Afue

Product Description

The GENERAL ELECTRIC nf97d070m3b is a modulating downflow gas furnace rated at 70,000 BTU/h with a 97% AFUE efficiency rating. It uses a variable speed ECM motor to adjust airflow and heat output in small increments, reducing temperature swings and operating noise compared to single- or two-stage units. The downflow configuration directs conditioned air downward from the unit, making it suitable for installations where ductwork runs beneath the furnace. Licensed HVAC technicians install and commission this equipment. At 140 pounds net weight and a compact footprint, it fits residential mechanical rooms and alcove installations where space is limited.

This furnace is designed for residential forced-air heating systems requiring a downflow configuration. The modulating gas valve and variable speed blower motor work together to match heat output to actual load demand, which improves comfort consistency and reduces short-cycling. The unit ships in gray and includes Insta-Position Technology and pre-formed flanges for simplified venting and positioning during rough-in. Crimped heat exchangers replace traditional welded construction. This furnace is appropriate for 3-ton matched system applications in residential construction and light replacement work.

Key Features

• 97% AFUE modulating operation for precise, efficient heat delivery
• Variable speed motor reduces operating sound levels and improves airflow control
• Downflow airflow configuration for under-furnace duct systems
• Insta-Position Technology simplifies field positioning during installation
• Pre-formed flanges and crimped heat exchangers for consistent fit and long-term durability
• Limited lifetime heat exchanger warranty with registration

Compatibility

Designed as an OEM-style modulating downflow gas furnace for residential forced-air heating systems sized for 3-ton matched cooling applications.

Installation Notes

Installation must be performed by a licensed HVAC technician in accordance with the manufacturer instructions and all applicable local codes, including IFGC requirements for gas appliances. Shut off gas supply and disconnect electrical power before any service or replacement work. Venting must be sized and routed per the furnace installation manual and local authority having jurisdiction. Do not fire the unit without confirming proper gas pressure, flue connections, and thermostat wiring are complete.

Technical Specifications

• Product Type: Gas Furnace
• AFUE: 97%
• BTU/h Output: 70,000 BTU/h
• Heating Stages: Modulating
• Airflow Direction: Downflow
• Tonnage: 3 Ton
• Motor Type: Variable Speed
• Emissions Level: Standard
• Color: Gray
• Overall Height: 33 inches
• Overall Width: 17.5 inches
• Overall Depth: 28.5 inches
• Net Weight: 140 pounds
• Approximate Shipping Weight: 150 pounds
• Parts Warranty: Limited 5-year entire appliance; Limited 10-year entire appliance with registration; Limited 20-year heat exchanger; Limited lifetime heat exchanger with registration
• Labor Warranty: No Warranty

Standard Information

• Brand: GENERAL ELECTRIC
• Manufacturer Part Number: nf97d070m3b