Goodman 100,000 BTU 97% AFUE Modulating Variable Speed Gas Furnace Downflow/Horizontal 21" Cabinet R-32

The flagship of the Goodman downflow furnace lineup — the most powerful, most efficient, most intelligent downflow furnace Goodman makes. The Goodman GDVM971005CN delivers 100,000 BTU of modulating heating at 97% AFUE in a wide 21" downflow cabinet with a high-capacity 5-ton ECM blower at 2,000 CFM. Built for large homes and light commercial applications with closet, alcove, or attic installations that require maximum downflow heating output with modulating precision, Energy Star certification, and every advanced feature in the Goodman lineup. When you need the absolute best downflow furnace Goodman makes — this is the one. 

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 downflow furnace lineup — a significant upgrade over 80%, 92%, and 96% models
• 100,000 BTU input / 97,000 BTU output — the highest heating output in the entire Goodman GDVM97 downflow lineup, built for large homes and light commercial applications without compromise
• 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 — the most precise heating control available in any Goodman downflow furnace
• True variable-speed ECM blower at 2,000 CFM — the highest airflow capacity in the GDVM97 lineup, continuously and intelligently ramps airflow up or down for whisper-quiet operation and maximum comfort
• 5-ton blower sizing — specifically engineered to handle the highest airflow demands of 5-ton R-32 cooling systems in a downflow configuration
• Energy Star certified — independently verified to meet strict energy efficiency guidelines set by the US EPA — may qualify for utility rebates in many states
• 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
• Downflow / horizontal installation — purpose-built for closets, alcoves, and attic installs where air needs to travel downward through the duct system
• Wide 21" cabinet — compatible with 2-5 ton R-32 cooling systems for a complete, balanced whole-home comfort setup
• 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 for added dependability
• Stainless-steel sloped secondary heat exchanger — the sloped design improves condensate drainage and heat extraction to achieve the industry-leading 97% AFUE efficiency rating
• Heavy-gauge steel cabinet with less than 2% air leakage — airtight construction minimizes heat loss and reduces sound output for the quietest possible operation
• Silicon nitride igniter — more durable than older hot surface igniters, reducing maintenance calls and replacement costs over the life of the unit
• 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 — wire directly to the low-voltage terminals for seamless indoor air quality integration
• LP convertible — easily field-converted to propane with optional kit, giving you fuel flexibility for your home
• 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 pairing with 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: 100,000 BTU | Output: 97,000 BTU
• AFUE: 97%
• Cabinet Width: 21"
• Gas Valve: Self-Calibrating Modulating
• Blower Motor: True Variable Speed ECM (5-Ton)
• Blower CFM: 2,000
• Fuel Type: Natural Gas (LP Convertible)
• Installation: Downflow / Horizontal
• Venting: PVC / Plastic — Single or Dual Pipe
• Voltage: 115V
• Compatible Cooling: 2-5 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.