Aluminized steel, dual-diameter tubular heat exchanger
• Two-stage gas valve operates on twostage
or single-stage thermostats
• ComfortNet™ Communications System compatible
• Efficient and quiet, variable-speed ECM
circulator motor gently ramps up or down
according to heating or cooling demand
• Silicon Nitride igniter
• Furnace control board with self-diagnostics and provisions
for electronic air cleaner and 120-volt or 24-volt humidifiers
• Low constant fan speed circulates air throughout the home.
• Quiet, two-speed induced draft blower
• All models comply with California NOx emissions standards