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Everything under Control

The Smile SDC/DHC Controllers combine simple installation and operation with a wide range of applications. Whether you have underfloor heating or radiator heating systems, hotwater, heat generators and boiler sequence controllers, solar and multivalent integrations, or district heat applications – with Smile, you have everything under control.


  • Wide range of applications
  • Pre-set basic programs reduce planning and start-up effort
  • Quick wall / wiring cabinet mounting by virtue of large wiring box and clever spring terminal design.
  • Intuitive operation through the use of symbol keys, simple pushbuttons and dials, and easy-to-view display
  • Easily expandable from stand-alone device to small network
  • Modern room devices (optional) simplify remote control

All Applications

Smile controllers are optimal for use in OTC-controlled inlet temperature control and room temperature control of all radiators, convection heaters, and low-temperature heating systems (e.g. underfloor heating systems). All heat generators (e.g. oil, gas, woodburning boilers, solar collectors, and district heating exchangers) can be integrated in the Smile energy management system. Stand-alone boilers, boiler sequence systems, or multivalent systems – Smile can handle it all. Depending upon requirements and installation complexity, up to five Smile SDC/DHC controllers can be wired together via a two-wire bus to form a control system, thus permitting a wide variety of different applications. All appropriate applications can be set up on-site using a dial. The accompanying examples show just a few of the numerous possible applications.