Hi - picking up on this old thread as it seems to be the only one about Variotherm. I installed this wall-panel heating in 2007, perhaps one of the first in a residential property in the UK. I'm really please with it but after so many years I can no longer dredge up the technical details that led us to the specifications we installed. But I do have one question: can anyone recommend a competent heating engineer (for north London area) to service the system. We've had some real issues with finding someone who understands the manifold, electrics etc. Thanks.