Ion™ 18 Variable-Speed Heat Pump

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Enjoy comfort without compromise, thanks to our variable-speed heat pump with SmartSenseTM technology. This whisper-quiet system efficiently adapts to changing conditions so you stay comfy with outstanding efficiency. Use it year-round in most climates with enhanced summer humidity control and warm winter heating even in colder temperatures.Or, combine it with a compatible gas furnace and thermostat to gain dual fuel heating efficiency in more extreme climates. You can also enjoy the convenience of remote access and the assurance of best levels of performance and comfort management when you pair it with a complete communicating system, including the energy-smart Ion™ System Control with Wi-Fi® capability.1

Features & Benefits

  • Quiet performance (as low as 56 decibels)*
  • 5 stages of variable-speed compressor operation, providing our best  temperature and summer humidity control
  • Variable-speed fan works with compressor for best levels of quiet, efficient operation
  • Dual fuel capable with a compatible gas furnace and thermostat for energy-saving heating
  • Durably built with tight wire grille and protective corner posts to withstand bad weather and debris
  • Designed for corrosion resistance and lasting performance
  • Wi-Fi® enabled remote access with the Ion™ System Control1
  • 10-Year No Hassle Replacement™ Limited Warranty±
  • 10-Year Parts Limited Warranty+


  • High-efficiency variable-speed rotary compressor 
  • High-efficiency variable-speed fan motor
  • Advanced electronic control quietly switches between heating, cooling and defrost modes 
  • System protecting high pressure switch, low pressure transducer and filter drier
  • Durable, protective tight wire grille panels allow easy coil cleaning; corner posts for extra strength and style
  • High-gloss, baked-on powder coat finish over galvanized steel
  • Sound-reducing features: aerodynamic variable-speed fan, soft mounted compressor, high performance acoustic-absorbing compressor blanket, and Quiet Shift defrost
  • Compatible control: Ion™ System Control installed as part of a complete communicating system for full function and efficiency capability, Wi-Fi® remote access convenience, and intelligent diagnostics
  • Electronic Expansion Valve for efficient heating control
  • Non-ozone depleting R-410A refrigerant
  • Cooling capacity: 2–5 tons

Product details

Efficiency RatingEfficiency Ratinghelp_outline
Up to 19 SEER cooling / Up to 13 EER cooling
Sound levelSound levelhelp_outline
As low as 56 decibels
Communicating CapabilityCommunicating Capability
Wi-Fi® enabled remote access with the Ion™ System Control
No Hassle Replacement<sup>TM</sup> Limited WarrantyNo Hassle ReplacementTM Limited Warrantyhelp_outline
10-Year No Hassle Replacement™ Limited Warranty+
Parts WarrantyParts Warranty
10-Year Parts Limited Warranty±
Energy Star<sup>®</sup> QualifiedEnergy Star® Qualifiedhelp_outline
U.S. Environmental Protection Agency voluntary program that helps protect climate through energy efficiency
Fan MotorFan Motor
Variable-speed operation
5 stages of variable-speed compressor operation, providing our best temperature and summer humidity control
Cooling capacityCooling capacity
2-5 tons
Non-ozone depleting R-410A