• PlusOne® Ignition System: Direct Spark Ignition (DSI) for reliability and longevity.
• Scroll Compressors on all models: Provides maximum efficiency and quiet operation.
• MicroChannel Evaporator & Condenser Coil: Delivers superior performance with a robust surface, a decreased refrigerant requirement and is lighter than conventional copper tube/aluminum fin coils.All-aluminum construction offers superior protection against formicary corrosion and aluminum tube rubbing damage. Design allows for easier and faster cleaning.
• Thermal Expansion Valves: Standard on all models for precise superheat control, reliability, and energy efficiency at all operating conditions.
• High Pressure Control: Standard on all models for refrigerant component protection and reliability.
• Easily Accessible Control Box, Furnace Compartment and Slide-Out Blower Section Allows for faster installability and serviceability.
• Supplemental Electric Heating Option Available: Field-Installed, electrical heat strips, up to 15 kW with simplified single-point wiring, are available for periods of extreme weather conditions.
• Tested. Trusted. Tough. 100% Factory Run Tested.
• PlusOne® Refrigerant Detection System™¹ Integrated, patented design providing system protection and homeowner peace-of-mind with low GWP refrigerant monitoring

¹ Factory installed on 3.5, 4 and 5 ton AC models and all tonnages on HP models. For R-454B equipment with a refrigerant charge less than 3.9 lbs (≈1.8 kg or ≈62.6 oz), a refrigerant detection system is not required by the UL 60335-2-40 standard.