Goodman 80,000 BTU 80% AFUE Single-Stage Gas Furnace – GR9S800803BN - Replacement for GM9S800803BN

The Goodman GR9S800803BN is a dependable 80,000 BTU gas furnace designed to deliver consistent, cost-effective heating for medium-sized homes. With an 80% AFUE efficiency rating and a multi-speed ECM blower motor, this unit provides reliable performance while maintaining steady airflow and indoor comfort throughout the heating season.

Built for durability and ease of installation, this furnace supports both upflow and horizontal configurations, making it a versatile replacement option for older 80% furnaces. Whether you're upgrading an aging system or installing a new one, the GR9S800803BN offers proven Goodman reliability at an affordable price point.

Key Features & Benefits

• 80,000 BTU heating capacity for consistent whole-home warmth
• 80% AFUE efficiency for reliable, standard-efficiency performance
• Multi-speed ECM blower motor for improved airflow and energy efficiency
• Single-stage gas valve for straightforward, dependable operation
• Heavy-duty aluminized steel heat exchanger for long-term durability
• Quiet operation with optimized airflow design
• Compatible with both natural gas and propane (LP conversion required)

Technical Specifications

• Model: GR9S800803BN
• Heating Capacity: 80,000 BTU
• Efficiency Rating: 80% AFUE
• Fuel Type: Natural Gas (LP Convertible)
• Blower Motor: Multi-Speed ECM
• Installation Type: Upflow / Horizontal
• Cabinet Width: 17.5 inches
• Venting: Requires metal flue (non-condensing furnace)

Ideal Applications

This Goodman furnace is a great fit for:

• Homes approximately 1,800–2,400 sq ft (depending on climate and insulation)
• Replacement of older 80% AFUE furnaces using existing metal venting
• Homeowners seeking a reliable, budget-friendly heating solution
• Standard-efficiency systems where high-efficiency venting is not required

Installation & Compatibility Notes

• Designed for upflow or horizontal installation configurations
• Requires connection to a metal flue venting system (not compatible with PVC venting)
• Must be installed by a licensed HVAC professional
• LP (propane) conversion kit required for propane applications
• Compatible with most standard HVAC thermostats

What’s Included

• Goodman GR9S800803BN furnace unit
• Factory-installed control board and components
• Installation manual and documentation

Warranty Information

• 10-Year Parts Limited Warranty (with online registration)
• Lifetime Heat Exchanger Limited Warranty (original registered owner)

Why Choose This Goodman Furnace?

The GR9S800803BN offers a strong balance of affordability, reliability, and performance. It’s an excellent choice for homeowners who want dependable heating without the added cost of high-efficiency venting upgrades. With Goodman’s proven track record and durable construction, this furnace is built to keep your home comfortable season after season.

Need Help Choosing the Right Furnace?

Not sure if this is the right size or type for your home? Our HVAC specialists are here to help you select the best system based on your square footage, climate, and installation setup.