Standard Features
• Dual-diameter tubular heat exchanger
• Two-stage gas valve that allows installer to turn on
two-stage operation with the flip of a dipswitch
• Energy-efficient circulator motor (EEM)
• 115V Silicon Nitride igniter designed for long igniter life
• Furnace control board with self-diagnostics, colorcoded
low-voltage terminals, and provisions for
electronic air cleaner and 24-volt humidifiers
• Control board stores the last five diagnostic codes
in memory; simple push-button activation outputs
the fault history to a flashing red LED
• Low constant fan allows homeowner to
activate the low heat speed to efficiently
circulate air throughout the home.
• Self-adjusting feature automatically adjusts furnace to high- or low-stage operation based on outside temperature without an outdoor temperature sensor.
• Certain models available with low NOx emissions