Vitavia window opens to greenhouse jealousy window window opens model sesame. Window opens with special design, there match to jalousivinduer to greenhouses. Two powerful springs ensures fast reaction on temperature drop. Nb there bowl removed two rivets in jalousivinduet before it automatic opens mounted. Avenue vitavia window openers works by help of solar power: it black cylinder contains oil, there expands themselves, fool cylinder becomes hot past, the laws draws themselves together again, fool temperature falls...
