80% Single Stage Heating FurnaceEasier To Sell 80% Afue Flame Roll-Out Sensors Standard Category I Venting Blocked Vent Switch Louvered Door 24 Vac and 115 Vac Humidifier Terminal Electronic Air Cleaner Terminal Twinning Furnaces Of Same Heating and Cooling Sizes with Approved Kit California Nox Approved Certified To Leak 2 Percent or Less Of Nominal Air Conditioning CFM Delivered When Pressurized To 1-Inch Water Gauge with All Present Air Inlets, Air Outlets, and Condensate Drain Port(S) Sealed Tougher: PSC Blower Motor Adjustable Heating Blower Off Delay Factory Set Blower On Delay RPj Aluminized Steel Heat Exchanger High Temperature Limit Control Prevents Overheating Direct Ignition with Silicon Nitride Ignitor One Piece Prepainted Steel Cabinet Quieter:In-Shot Burners Easier To Install and Service: 33 1/3' (847mm) 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 Three Position Inducer Elbow Capability Through The Casing Flue Pipe For Counterflow Applications Common Venting with Other Category I Appliances Masonry Chimney Adapter Available Self Diagnostics Slide Out Blower Assembly Warranty * 20 Year Heat Exchanger Limited Warranty 5 Year Parts Limited Warranty- with Timely Registration, An Additional 5 Year Parts Limited Warranty * Applies To original Purchaser/Homeowner, Some Limitations May Apply. See Warranty Certificate For Complete Details. ! WarningThis Furnace Is Not Designed For Use In Mobile Homes, Trailers, or Recreational Vehicles. Such Use Could Result In Property Damage and/or Death.