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SolarVenti at Sea!

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Hals Barre lighthouse, located about five miles east of Hals in North Jutland, Denmark, was treated to an extensive renovation from 2013 and onwards – both outside and inside.… Read More

New Motor-driven Valve

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The new motor valve provides an additional safeguard against hard drafts. The valve closes and opens only when the solar air collector starts (and the valve receives + 5V voltage). … Read More