Goodman 100,000 BTU 80% AFUE Two-Stage Variable Speed Gas Furnace Upflow/Horizontal 21" Cabinet R-32

The most powerful furnace in the GRVT80 lineup — 100,000 BTU of two-stage variable speed heating at 80% AFUE with a 2,000 CFM variable speed blower in a wide 21" upflow cabinet. The Goodman GRVT801005CN is Goodman's flagship 80% AFUE furnace — combining maximum heating output with the most advanced blower technology in the lineup. Built for large homes and light commercial applications that need serious heating power with the intelligence of true variable-speed operation. When you need the best 80% furnace Goodman makes in the highest BTU available, this is it. 

Why You'll Love It:

• 80% AFUE efficiency — converts 80 cents of every energy dollar into heat, keeping operating costs predictable without overpaying for efficiency ratings designed for larger or colder applications
• 100,000 BTU input / 80,000 BTU output — the highest heating output in the GRVT80 lineup, built for large homes and light commercial applications without oversizing or wasted capacity
• True variable-speed ECM blower at 2,000 CFM — the most advanced blower in the Goodman 80% furnace lineup, continuously and intelligently adjusting airflow for maximum comfort, minimum noise, and lower electricity costs
• Two-stage gas valve — runs at lower output on mild days for gentler, quieter cycling and more even room temperatures, then ramps to full power when temperatures really drop
• 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 2-5 ton R-32 cooling systems for a complete, balanced whole-home comfort setup
• Heavy-duty aluminized-steel tubular heat exchanger — engineered for long-lasting durability and efficient heat transfer with wrinkle-bend technology for added dependability
• Heavy-gauge steel cabinet with less than 2% air leakage — airtight construction minimizes heat loss and reduces sound output for quieter, more economical 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 — stores the last fault codes so your technician can diagnose issues fast, cutting service time and costs
• Compatible with electronic air cleaners and humidifiers — wire directly to the low-voltage terminals on the control board for seamless indoor air quality integration
• LP convertible — easily field-converted to propane with optional kit, giving you fuel flexibility for your home
• Metal flue venting required — straightforward installation using standard metal duct for safe, code-conforming exhaust
• R-32 compatible — future-ready refrigerant support for pairing with modern R-32 cooling systems
• AHRI Certified and ETL Listed — independently verified for safety and performance
• Made in the USA — designed, engineered, and assembled domestically

⚠️ Metal venting required — this is an 80% AFUE furnace and requires metal flue venting, not PVC.

Specs:

• Input: 100,000 BTU | Output: 80,000 BTU
• AFUE: 80%
• Cabinet Width: 21"
• Stages: Two
• Blower Motor: True Variable Speed ECM (5-Ton)
• Blower CFM: 2,000
• Fuel Type: Natural Gas (LP Convertible)
• Installation: Upflow / Horizontal
• Venting: Metal
• Voltage: 115V
• Compatible Cooling: 2-5 Ton R-32 Systems

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