Abstract: . . .  where manufacturers and installers offer systems and maintenance. It is remarkable, that the diffusion success is primary based on local initiatives. For the further market diffusion of solar thermal systems, technology reliability and performance may be the main impacts. The “learning curves” should be improved by more technical . . .
. . .  self-constructed collectors decreased and the industrial produced collectors increased; Figure 13. Research activities did not play a significant role for the collector development and market penetration in Austria. Research work became important for systematic testing (demonstration projects) and for the establishment of standards. . . .
. . .  and installers offer systems and maintenance. It is remarkable, that the diffusion success is primary based on local initiatives. For the further market diffusion of solar thermal systems, technology reliability and performance may be the main impacts. The “learning curves” should be improved by more technical monitoring with a guarantee . . .
. . .  installers offer systems and maintenance. It is remarkable, that the diffusion success is primary based on local initiatives. For the further market diffusion of solar thermal systems, technology reliability and performance may be the main impacts. The “learning curves” should be improved by more technical monitoring with a guarantee . . .
. . .  problem, that traditions of wrong design are established, without learning from system optimisation. This problem could be solved within certification of installed systems. In terms of lessons learned, there was a certain tendency in the past to put too much emphasis on high-technology solutions in the end-user sector. Experience . . .
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