Goodman - 80,000 BTU 80% Gas Furnace - 17.5" Width - Upflow / Horizontal - Single Stage - 115V - R32 - GR9S800804BU

Goodman - 80,000 BTU 80% Gas Furnace - 17.5" Width - Upflow / Horizontal - Single Stage - 115V - R32 - GR9S800804BU

The GR9S800804BU Goodman gas furnace features high-quality construction and efficient operation at a great value. The GR9S800804BU single-stage, 9-speed furnace utilizes Goodman's superior heat exchanger design to provide efficient, reliable heating to your home. If you're looking to cut your energy bills and improve your comfort without breaking the bank, your search stops with the Goodman GR9S800804BU.

Features

• This furnace is ideal to heat a medium-sized house (depending on climate)
• 80,000 BTU 80% efficient natural gas furnace
• Requires metal flue venting
• Can be used in the upflow or horizontal orientation
• Ultra-Low NOx Compliant for California
• Innovative design for electrical efficiency, safety, and lower sound output
  

Specifications

Manual

• Installation Manual
• Specifications Sheet
  

What our Experts Think

• Reliable, Everyday Heating: The Goodman GR9S800804BU Gas Furnace offers 80,000 BTU with 80% AFUE, delivering steady, dependable heat for year‑round comfort in small to medium homes.

• Straightforward Single‑Stage Operation: The single‑stage design provides consistent warmth with simple, proven performance, making it easy to install and maintain.

• Compact & Flexible Fit: With a 17.5" narrow cabinet, this furnace supports both upflow and horizontal installations, fitting well in tight spaces like closets, attics, or basements.

• Goodman Durability: Built with quality components and a robust heat exchanger, engineered for dependable everyday operation.

• Great Value Choice: Offers a cost‑effective heating solution with solid performance and trusted reliability, ideal for budget‑conscious homeowners seeking straightforward comfort.

Q&A

Q: What heating capacity does this furnace provide?
A: The Goodman GR9S800804BU delivers 80,000 BTU input / ~64,000 BTU output, making it suitable for small to medium homes when sized correctly.

Q: What does the 80% AFUE rating mean?
A: 80% AFUE means about 80 ¢ of every dollar spent on fuel becomes heat for your home — a solid standard efficiency level that balances cost and performance.

Q: What type of heating system is it?
A: It’s a single‑stage gas furnace with a multi‑speed ECM blower motor, offering reliable operation and quieter airflow than traditional motors.

Q: Where can this furnace be installed?
A: Designed for upflow or horizontal installation, so it fits attics, basements, closets, or crawl spaces with horizontal duct runs.

Q: What venting does the unit require?
A: Requires metal flue venting typical of 80% AFUE furnaces (PVC venting is for >90% efficiency units).

Q: What power and electrical specs?
A: Operates on 115 V, single‑phase power with typical residential wiring.

Q: Is this furnace compatible with modern refrigerant systems?
A: Yes — it’s R32 compliant, matching modern HVAC refrigerant standards for split systems.

Q: Does it offer emissions compliance?
A: This model features Ultra‑Low NOx compliance, suitable for areas with stricter emissions requirements.

Maintenance Tips

• Replace Air Filters Monthly: Maintain proper airflow and protect the blower; use quality filters every 1–3 months.

• Keep Vents & Registers Clear: Ensure supply and return vents are unobstructed for consistent heating.

• Inspect Venting System: Check intake and exhaust pipes for blockages, corrosion, or damage to ensure safe operation.

• Clean Around the Furnace: Maintain 2–3 ft of clearance to prevent dust buildup and allow proper airflow.

• Monitor Blower Operation: Single-stage blowers should run steadily and quietly; unusual sounds may indicate issues.

• Check Thermostat & Power Supply: Confirm thermostat settings, gas supply, and 115V circuit are working properly.

• Schedule Annual Professional Service: A licensed HVAC technician should inspect burners, heat exchanger, gas pressure, ignition system, and safety controls yearly.