Today there is an enormous installed base of HVAC control equipment – current estimates provided by our HQ in Zug, Switzerland include 2 million heating controllers, 15 million control valves, and approximately 10 million field devices currently installed and working somewhere.

An online database now exists which provides a comprehensive listing of old HVAC products from Landis & Gyr and Staefa Control System, together with pictures, detailed descriptions of the replacement, and links to the new product.