Personalised Cooling at a Single Click using Flexicool Technology We believed that technology should adapt to human needs rather than the other way around, which is why Carrier ACs have Flexi cool Technology. This means that in addition to modifying the cooling efficiency of the AC, you can also change the energy consumption of the AC with four distinct tonnage modes. With Flexi Cool Inverter technology, you can experience personalised cooling at the touch of a button.