Range : POWERCIAT2 LX - LXC series High energy efficiency (HEE) class A version Standard energy version (STD) class B LX: water chiller without hydraulic system LXC: water chiller with hydraulic circulation pump (optional buffer tank) 9 models from size 2800X to 6400X for the standard version 10 models from size 2500X to 4800X for High energy efficiency HEE version 3 sound levels available for both energy versions High Efficiency (HEE) - Low Noise (HEELN) - Xtra Low Noise (HEEXLN) for the HEE version Standard (STD) - Low Noise (STDLN) - Xtra Low Noise (STDXLN) for the standard version