Complete, expandable systems to control radiant heating and cooling installations for floors, ceilings, and walls. They include a limited number of components and they are designed for flexibility of operation. They can control small installations or large multizone systems and centralized energy plants, providing temperature control for every single user. Thanks to innovative electronic boards, Wi controllers make it possible to use wire room sensors, bus terminals and/or wireless probes in the same installation. Each control unit can be connected with external systems/supervisors, home automation and domotic devices.