The Comfort Control² System™ provides over 28 on-board diagnostics and fault history codes by detecting system and electrical problems. “Call for Service” alert notification is sent to the thermostat to alert the homeowner of required service.

Heat exchanger is constructed of all stainless steel for maximum corrosion resistance and thermal fatigue reliability.

Two-stage Function: when used with a two-stage thermostat, furnace operates at 40% on first stage, and stages up to 65%, then 100% for second stage.

Reduced firing rates, electrically efficient ECM2+ motor, and solid doors provide the ultimate in quiet operation.

Seven segment LED for system diagnostics.

Two-speed induced draft motor.

Optional indoor or outdoor combustion air.

Serial Communication Enhanced. When installed with a Serial Communicating Condensing Unit and user interface control.

This unit offers 4 or 2 wire installation, auto-configuration, and diagnostic messaging with full communicating capability.

Modulating Function: when used with a modulating or communicating thermostat, modulation rate between 40% and 100% of total capacity.

Multistage Function: when used with a single-stage thermostat, furnace functions as a three stage furnace operating at 40%, 65% and 100% of total capacity.

Low speed constant fan.

Diagnostic history for troubleshooting.

Direct spark ignition with remote sense.