Oil/gas boilers for medium and high output

System technologySolar thermal andphotovoltaicsVacuum tube collectors can beinstalled anywhere, and in newbuild also make for an attractivearchitectural feature.Solar thermal – free solar energyAll medium and industrial/commercial boilers can be combined with suitable solartechnology. In such cases, the free solar energy provides the DHW heating.A new heating system and a solar thermalsystem simply go hand in hand. There are goodreasons for this. In the summer, the majorityof the energy demand for DHW heating can becovered by solar collectors. Subject to systemsizing, the system can also provide centralheating backup.Calculated over the year, 60 % of energy canbe saved on DHW heating alone. After all, solarenergy is free, and daylight is converted intoheat by the collector even when the sun is notshining directly onto the roof.Particularly on commercial buildings, the wideexpanse of flat roofs offers an ideal base forthe installation of collector arrays.The principle is quite simpleOf course, the utilisation of solar energyrequires innovative technology and lots ofexperience: Solar thermal systems “harvest”solar energy in the flat-plate or tube collectors.In these, a heat transfer medium is heated bythe insolation and routed into a DHW cylinder.There, the heat is transferred to the potablewater to be heated via internal indirect coils,