Goodman 80% AFUE 100,000 BTU Single-Stage 9-Speed ECM Gas Furnace (Downflow/Horizontal) GD9S801005CN

The Goodman GD9S801005CN is a reliable, value-oriented 100,000 BTU natural gas furnace from the GD9S80 series. It delivers 80% AFUE efficiency with a single-stage gas valve and a multi-speed (9-speed) ECM blower motor. Designed for downflow or horizontal left/right installation, it is R-32 ready (with onboard refrigerant detection system support) and compatible with R-410A systems. Ideal for medium-to-larger homes needing dependable heating with quiet, efficient airflow up to 5 tons of cooling capacity.

Key Features

• Heavy-duty aluminized-steel dual-diameter tubular heat exchanger for efficient heat transfer and long life.
• Single-stage gas valve with durable hot-surface (silicon nitride) igniter.
• Quiet single-speed draft inducer.
• Multi-speed ECM blower motor (9 speeds) with continuous fan option for energy-efficient, quiet circulation.
• Self-diagnostic control board with constant memory and color-coded low-voltage terminals.
• Provisions for electronic air cleaner and humidifier.
• Foil-faced insulated heat exchanger and heavy-gauge steel cabinet with durable baked-enamel finish.
• Convenient left or right gas and electrical connections.
• Low NOx emissions compliant in many areas (not for SCAQMD or SJVAPCD in California).
• AHRI Certified and ETL Listed.

Benefits

• Reliable, even heating — Converts 80% of fuel into usable heat for consistent comfort and lower operating costs compared to older, less efficient units.
• Quiet, efficient operation — ECM multi-speed blower reduces energy use and noise while providing better airflow control.
• Flexible installation — Downflow or horizontal orientations suit closets, alcoves, attics, or crawlspaces; left/right connections simplify setup.
• Long-term value — Durable heat exchanger and components, plus Goodman’s strong warranty support (typically limited lifetime on heat exchanger and 10-year parts with registration).
• Future-ready — R-32 compatible with refrigerant detection system; supports pairing with modern air conditioners or heat pumps.
• Easy maintenance & diagnostics — Self-diagnostic board and clear terminals reduce service time.

Dimensions

• Height: 33-3/8 inches
• Width: 21 inches
• Depth: 28 inches
• Cabinet size: C (21″ wide). Non-combustible floor base (e.g., SBT21) recommended for downflow installations.

Compatibility

• Installation orientation: Downflow or horizontal left/right only (not upflow — use GR9S series for upflow/horizontal).
• Fuel: Natural gas standard; LP/propane with optional conversion kit.
• Air conditioning / coils: Compatible with Goodman and many third-party R-32 or R-410A evaporator coils and condensers (up to 5 tons). Supports multi-stage compressors in many cases.
• Accessories: Electronic air cleaners, humidifiers, thermostats, and LP conversion kits.
• Restrictions: Not for mobile homes. Not approved for certain California air quality districts (SCAQMD/SJVAPCD). Nationwide (except restricted CA areas) in most listings. Altitude range typically 0–4,500 ft (check local codes).

This furnace offers solid performance and durability at a competitive price point for residential replacement or new installations requiring a downflow or horizontal configuration. Always have a licensed HVAC professional handle sizing, installation, and local code compliance.