TAC Xenta ® 101-VF is a zone controller intended primarily for fan coil applications with the ability to control fans with multiple speeds, with one or two valve applications. The TAC Xenta 101-VF also has an auxiliary output for general use. The TAC Xenta 101-VF controls the space temperature in a zone by regulating the temperature of the air circulated through the fan-coil unit. The TAC Xenta 101-VF is available in three different models: 24 V AC supply, 115 V mains supply and 230 V mains supply.