Micro KX6 Heat pump VRF outdoor Unit - Connect up to 8 indoor units/up to 150% capacity. - High efficiency with COP (in cooling) up to 4.0. - These units employs DC inverter compressors ONLY. - Total of all piping lengths is up to 100m. - Maximum pipe length from outdoor unit of 70m. - Maximum length of 9.52mm liquid pipe of 50m.