A high performance vacuum tube collector


  • Highly efficient vacuum tube collector based on the heat pipe principle, with ThermProtect automatic temperature-dependent shutdown for high operational reliability
  • Protection against overheating during prolonged insolation
  • Long service life due to low stagnation temperatures and prevention of steam forming within the system
  • The absorber surfaces with highly selective coating, which are integrated into the vacuum tube, are not susceptible to contamination
  • Efficient heat transfer through condensers fully surrounded by the copper Duotec double pipe heat exchanger
  • Optimum alignment with the sun, thanks to uncomplicated absorber alignment
  • Dry connection, no contact between process medium and solar medium, i.e. individual tubes can be replaced whilst the system is fully charged
  • Dark blue collector casing and absorber surfaces form a visually seamless whole
  • Highly effective thermal insulation of the header casing for minimum thermal losses
  • Easy, quick installation with the Viessmann installation and connection systems

Vacuum tube collectors