Up To 96% AFUE, Two-Stage ECM Gas FurnaceFeatures: Up To 96% AFUE, All Models, All Positions California Nox Approved All Models Have Earned The Energy Star Two-Stage Heating Operation Xtra SEER ECM Blower Motor Supports Single- and Two-Stage Cooling Units Approved For Twinning Applications (0601412 Through 1202422) Dehumidification Feature In Cooling Electronic Air Cleaner Terminal Certified To Leak 2% or Less Of Nominal Air Conditioning CFM Delivered When Pressurized To 1' Water Column with All Present Air Inlets and Outlets, and Condensate Drain Port(S) Sealed Tougher Flame Roll-Out Sensors Standard Adjustable Heating Blower Off Delay Factory Set Blower On Delay Stainless Steel Secondary Heat Exchanger High Temperature Limit Control Prevents Overheating Direct Ignition with Silicon Nitride Ignitor High-Quality, Cor Rosion-Resistant, One-Piece Steel Cabinet Quieter: Operates Quieter At Lower Heating Rates Two-Speed Induced Draft Combustion Blower Fully Insulated Steel Cabinet Easier To Install and Service: Direct Vent (2-Pipe), Single-Pipe Venting or Ventilated Combustion Air 24 Vac Humidifier Terminal 35' (889mm) High, For Ease Of Installation Innovative Knobs For Easy Door Removal and Secure Attachment Factory Shipped For Natural Gas, with Propane Gas Conversion Kits Available Four Position - Upflow/Downflow/Horizontal (Left/Right) Installation At Least Twelve Different Venting Configurations Through The Casing Flue Pipe For Counterflow or Horizontal Applications with Accessory (order Separately) Concentric Vent Available Self Diagnostics with Super Bright Led Slide Out Heat Exchanger Assembly and Blower Assembly Warranty: * 5 Year No Hassle Replacement Limited Warranty Lifetime Heat Exchanger Limited Warranty 5 Year Parts Limited Warranty - with Timely Registration, An Additional 5 Year Parts Limited Warranty * For Owner Occupied, Residential Applications Only. See Warranty Certificate For Complete Details and Restrictions, Including Warranty Coverage For Other Applications.