Indoor chiller for the production of chilled water suitable for large users in residential, commercial or industrial buildings. Single-circuit unit with centrifugal inverter two-stage oil-free magnetic levitation compressor, standard also features a device for reducing the inrush current (only 6 Amperes!) The electronic thermostatic valve, combined with the continuous modulation of the inverter compressor ( from 30% to 100%) it allows to quickly and accurately satisfy any request of the thermal load. The exchangers are tube bundles. The evaporator is flooded with a subcooler, the condenser can be 1 or 2 water side passages, to satisfy any installation requirement. Available in standard or silenced version with complete cowling to further reduce noise emissions. The technological choices made, always oriented to the highest quality and efficiency, allow EER values to be reached> 6 (class A for Eurovent working conditions) and Extraordinary efficiencies at partial loads (ESEER up to 9 of the highest in the market).