Patented Million Air™ Stainless Steel Dual-Diameter Tubular Heat Exchanger. 

ComfortNet™ Communications System Compatible. 

Efficient, Quiet Variable-Speed Circulator Motor gently ramps up or down according to heating or cooling demand. 

SureStart™ rugged Silicon Nitride Igniter designed for long igniter life. 

Furnace control board with self-diagnostics, colour-coded low-voltage terminals, and provisions for electronic air cleaner and 120-volt or 24-volt humidifiers.

Low constant fan allows homeowner to activate very low speed to efficiently circulate air throughout the home. This setting costs as little as a 100-watt light bulb to operate. 

Auto-Comfort setting provides outstanding humidity and temperature control. 

Two-stage heating technology and variable-speed blower ensures ongoing room-to-room and floor-to-ceiling temperature consistency. 

Insulated Cabinet.