Unlike some other evacuated tube systems, the Ritter tubes sit nice and tight to the roof.
A close-up of the Ritter tube array. The shiny plate underneath the tubes reflects sunlight up to the tubes, so most of the circumference of the black inner tube surface is heated. Note the "lead slate" we have constructed to take the solar pipework into the house without letting water in – a traditional method but in our view the best!
Unlike some other evacuated tube systems, the Ritter tubes sit nice and tight to the roof. 