Goodman 80% AFUE 100,000 BTU Single-Stage 9-Speed ECM Gas Furnace (Upflow/Horizontal) GR9S801005CN

The Goodman GR9S801005CN is a reliable, value-focused residential gas furnace delivering 100,000 BTU input (80,000 BTU output) with 80% AFUE efficiency. It features a 9-speed ECM blower motor for quieter, more efficient airflow and flexible multi-position installation (upflow or horizontal left/right). Designed for natural gas (convertible to propane with a kit sold separately), it is R-32 ready and pairs with compatible air conditioners and coils for complete central systems. Ideal for medium to larger homes depending on climate and insulation.

Key Features

• Heavy-duty aluminized-steel dual-diameter tubular heat exchanger for efficient heat transfer and durability
• Single-stage gas valve with durable hot-surface silicon nitride igniter for reliable ignition
• Quiet single-speed draft inducer
• 9-speed (multi-speed) 3/4 HP ECM blower motor (≈1,075 RPM) with 10″ × 10″ circulator blower
• Self-diagnostic control board with constant memory and color-coded low-voltage terminals
• Foil-faced insulated heat exchanger cabinet
• Heavy-gauge steel cabinet with durable baked-enamel finish
• Left- or right-side gas and electrical connections for easier installation
• Provisions for electronic air cleaner and humidifier
• 5 burners
• Temperature rise range typically 35–65°F
• R-32 refrigerant compatible (with on-board RDS; supports other refrigerants with proper configuration)
• Requires metal flue venting (4″ diameter)

Benefits

• Reliable, even heating — Consistent single-stage operation combined with multi-speed ECM airflow helps maintain comfortable temperatures with less temperature swing.
• Energy and cost savings — 80% AFUE means 80% of fuel energy is converted to heat; the ECM motor uses less electricity than traditional PSC motors.
• Quieter operation — ECM blower and single-speed draft inducer reduce noise compared with older single-speed designs.
• Installation flexibility — Upflow or horizontal left/right configurations and dual-side connections simplify placement in tight spaces or existing duct systems.
• Longevity and serviceability — Robust heat exchanger, self-diagnostics, and accessible components support long service life and easier troubleshooting.
• System expandability — Ready for add-ons like humidifiers, air cleaners, and matching cooling equipment (up to ≈5 tons).
• Warranty protection — Lifetime limited heat exchanger warranty and 10-year limited parts warranty (with online registration; terms apply).

Dimensions

• Cabinet: 21″ W × 28″ D × 33⅜” H (33.375″)
• Weight: Approximately 132 lbs (shipping weight similar)
• Blower: 10″ × 10″
• Vent/Flue: 4″ diameter metal
• Gas connection: ½” female threaded
• Supply air opening approx. 19.5″ × 19.5″; side return options available depending on install.

Compatibility

• Installation: Upflow or horizontal only (not downflow — use GD9S80 series for downflow). Suitable for standard residential ducted systems; not mobile-home rated.
• Fuel: Natural gas standard; propane conversion kit (sold separately) required for LP.
• Cooling: Matches with Goodman or compatible R-32, R-410A, or other coils/air conditioners (up to 5 tons). Multi-stage compressor compatible in many setups.
• Accessories: Compatible with electronic air cleaners, humidifiers, and standard thermostats. Requires proper metal flue/chimney venting.
• Restrictions: Some models note Low-NOx options or limitations (e.g., not for certain California air districts without the proper Low-NOx version). Always verify local codes, altitude (typically rated 0–4,500 ft base), and professional installation requirements.

Note: Professional installation by a licensed HVAC technician is required. Confirm exact specifications, local code compliance, proper sizing (Manual J load calculation), and warranty registration with the manufacturer or authorized dealer. Specs can vary slightly by source or production run; always refer to the official Goodman specification sheet and installation manual for the unit.