Точнее самоуверенность ))
Ловите текст на английском:
"The key to Fujitsu’s VRF is the combination of three constant speed compressors and PAT, rather than the traditional inverter or two compressor systems. Three compressors gives seven steps of control and PAT smoothes out the steps required for the varying capacities: reducing noise, increasing efficiency and therefore, improved economy."
Взят отсюда:
http://www.infolink.com.au/articles/86/0c019a86.asp