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The sun...our caretaker


Experiences of the gardening club Alsterkanal e.V. which were made with the TWINSOLAR 4.0, installed on the club house in Hamburg: "After having installed the Twinsolar on our wooden club house, we have noticed after a time when entering the house that the atmosphere is comfortable and the air is fresh and dry, not damp and cold as before.

This has surprised us positively. Also the demand for heating energy has been reduced by 40% per year."

Unser Hausmeister

German Quality...subsidised by the state

Our SolarAir collectors are being developt already for 30 years in our own factory in Amberg under the highest demands on quality. They are very robust and can be used during decades.


SolarAir collectors by Grammer Solar are subsidised in Germany.


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