TAC Xenta 100 is a group of application-specific, pre-programmed zone controllers that enable the indoor climate in a single room to be controlled. There are models for fan-coil, VAV and cooling ceiling applications, all LonMark approved in terms of their relevant function profile. TAC Xenta 100 can be integrated into a larger controller system via LonWorks communication. TAC Xenta 100 can also interoperate with other systems in the building such as lighting to make things even more cost-effective.