- 40 – 120 mbth input
- Single-stage heat
- 9 tap Constant Torque ECM motor
- Single-speed draft inducer
- Silicon nitride igniter
- Single or two pipe vent options
- Stainless steel heat exchanger
The S9B1 furnace offers a constant torque ECM blower motor for comfort in cold weather, while maintaining the DNA that American Standard is known for: quality and reliability. The S9B1 is rated at 92.1% gas efficiency (AFUE), providing energy savings and a consistent flow of warm, comfortable air in both winter AND summer.