The programmable variable-speed blower motor helps keep rooms at the right temperature and humidity. Plus, greater efficiency means lower monthly utility bills;The programmable variable-speed motor ramps up slowly avoiding a noisy blast of air at start up; extra thick insulation and low-speed fan operation further minimize sound levels;The enhanced aluminum Quantum coil evaporator coil provides reliable operation in all types of environments;Inhibits mold and mildew growth for improved indoor air quality and reliable drain pan function. It is made from durable composite material that will not corrode or rust;All covered components - Limited ten years in residential applications, one year in non-residential applications. Refer to Lennox Limited Warranty Certificate for more details