- Heavy-duty aluminized-steel tubular heat exchanger
- Stainless-steel secondary
heat exchanger - Single-stage gas valve
- Durable silicon nitride igniter
- Quiet single-speed induced
draft blower - Self-diagnostic control board with constant memory fault code history output to a LED
- Color-coded low-voltage terminals with provisions for air cleaner and humidifier
- Cabinet air leakage (QLeak) = <2%
- All models comply with California 40 ng/J Low NOx emissions standards
GMSS92 Up to 92% AFUE Upflow Multi-Position Installation