Special inverter technology enables significant energy savings, quiet operation and long-lasting quality. The indoor unit has a BIO filter and a dust filter which makes the air you breathe very clean while the outdoor has a completely new construction that is now even quieter and more resistant to external influences. All this in energy class A ++ in cooling and A + in heating. Built-in Wi-Fi: Take control of your home air conditioner from a single app on your Apple or Android devices.