Multiposition 92.1 AFUE Gas Furnace,Features Include: Heating Efficiency or 92.1 AFUE; California NOX Approved Direct-Vent/Sealed Combustion, Single Pipe Venting or Ventilated Combustion Air PSC Blower Motor 4-Way Multiposition Furnace Hot Surface Ignition LED Diagnostics and Self Test Feature Stores Fault Codes During Power Outages Adjustable Heating Air Temperature Rise Adjustable Cooling Airflow Approved For Manufacture Housing/ Mobile Home Applications with Accessory (Order Separately) Certified To Leak 2% or Less Of Normal Air Conditioning CFM Delivered When Pressurized To 1-Inch Water Column with All Present Air Inlets, Air Outlets and Condensate Drain Port(S) Sealed Limited Warranty* 1 Year Unit Replacement Limited Warranty 20 Year Heat Exchanger Limited Warranty 5 Year Parts Limited Warranty