Rheem R801SA075417ZSB - Classic Series, 3 Ton, 14 SEER, 80%, 75K BTU, Downflow, Gas FurnaceFeatures: PlusOne Diagnostics - 7 Segment LED all units PlusOne Ignition System - DSI for reliability and longevity Heat exchanger is removable for improved serviceability. Aluminized steel construction provides maximum corrosion resistance and thermal fatigue reliability Low profile 34' cabinet ideal for space constrained installations Integrated Control board features dip switches for easy system set up QR code for quick access to product information from your smart phone or tablet