Goodman 80,000 BTU 97% AFUE Modulating Variable Speed Gas Furnace Upflow/Horizontal 21" Cabinet R-32

Same 80,000 BTU modulating precision — in a wider 21" cabinet for larger cooling systems. The Goodman GRVM970804CN delivers everything the GRVM970803BN offers — 97% AFUE, true modulating gas valve, variable-speed ECM blower, ComfortBridge™, CoolCloud™, and Energy Star certification — in a wider 21" upflow cabinet sized for homes with 2-4 ton R-32 cooling systems. The right choice when your installation requires a larger cabinet footprint without sacrificing any of Goodman's most advanced furnace technology.

Why You'll Love It:

• 97% AFUE efficiency — converts 97 cents of every energy dollar into heat, the highest efficiency rating available in the entire Goodman furnace lineup
• 80,000 BTU input / 77,600 BTU output — powerful, consistent heating for medium to large homes without oversizing or wasted capacity
• Self-calibrating modulating gas valve — infinitely adjusts output between 40% and 100% to precisely maintain your exact set temperature with virtually no swings or cycling
• True variable-speed ECM blower — continuously and intelligently ramps airflow up or down to match exact heating demand for whisper-quiet operation and lower electricity costs
• 4-ton blower sizing — specifically engineered to handle the airflow requirements of up to 4-ton R-32 cooling systems in the 21" cabinet
• Energy Star certified — independently verified to meet strict energy efficiency guidelines set by the US EPA
• Auto-Comfort mode — automatically optimizes airflow and temperature balance for whole-home comfort without manual adjustments
• Enhanced dehumidification mode — actively manages indoor humidity levels during cooling season for greater year-round comfort
• ComfortBridge™ communicating technology — enables smarter system communication between components for optimized whole-home comfort and efficiency
• CoolCloud™ Bluetooth app — allows contractors to commission, diagnose, and service the unit directly from a smartphone or tablet without removing the cabinet panels
• Upflow / horizontal installation — flexible placement in basements, closets, or utility rooms to suit your home's layout
• Wide 21" cabinet — compatible with 2-4 ton R-32 cooling systems
• Certified for direct vent (2-pipe) or non-direct vent (1-pipe) — flexible venting configurations for easier installation in a variety of applications
• Left or right gas and electrical connections — convenient field flexibility for faster, easier installation
• Heavy-duty aluminized-steel tubular primary heat exchanger — engineered for long-lasting durability and efficient heat transfer with wrinkle-bend technology
• Stainless-steel sloped secondary heat exchanger — improved drainage design extracts maximum heat to achieve the 97% AFUE efficiency rating
• Heavy-gauge steel cabinet with less than 2% air leakage — airtight construction minimizes heat loss and reduces sound output
• Silicon nitride igniter — more durable than older hot surface igniters, reducing maintenance calls and replacement costs
• Self-diagnosing control board with constant memory and dual 7-segment display — stores fault codes and displays them clearly for fast, accurate troubleshooting
• Compatible with electronic air cleaners and 120V or 24V humidifiers — seamless indoor air quality integration
• LP convertible — easily field-converted to propane with optional kit
• PVC/plastic venting required — high-efficiency condensing operation requires plastic vent pipe, not metal
• Complies with California Low NOx 40 ng/J emissions standard — approved for installation in all US states including California
• R-32 compatible — future-ready refrigerant support for modern R-32 cooling systems
• AHRI Certified, ETL Listed, and Energy Star Qualified — independently verified for safety, performance, and energy efficiency
• Made in the USA — designed, engineered, and assembled domestically

⚠️ PVC/Plastic venting required — this is a 97% AFUE condensing furnace and cannot use metal flue venting.

Specs:

• Input: 80,000 BTU | Output: 77,600 BTU
• AFUE: 97%
• Cabinet Width: 21"
• Gas Valve: Self-Calibrating Modulating
• Blower Motor: True Variable Speed ECM (4-Ton)
• Fuel Type: Natural Gas (LP Convertible)
• Installation: Upflow / Horizontal
• Venting: PVC / Plastic — Single or Dual Pipe
• Voltage: 115V
• Compatible Cooling: 2-4 Ton R-32 Systems
• Certifications: AHRI, ETL, Energy Star

Warranty: 10-year limited parts + lifetime heat exchanger warranty with online registration within 60 days of installation.