This automatic window opener from tectake is a temperature-controlled, fully automatic device that always ensures optimal ventilation in your greenhouse. No more wondering if youve accidentally left a window open on a cold night, or left it closed on a warm day. The window opener doesnt require electricity or batteries, and can be attached to any standard window size with ease. Create the best conditions for your plants to grow with the automatic window opener from tectake. HighlightsAutomatic opening and closing depending on temperaturePerfect ventilation of greenhousesLarge temperature rangeSuitable for all standard window sizesInfinitely adjustable opening angle by turning the cylinderSimple constructionWorks without electricity or batteriesEasy assemblyColour: silver Technical detailsTotal dimensions (LxWxH): 32 x 4.5 x 5 cmLifting capacity: 7 kgLifting height: approx 40 cmTemperature range: 15° to 35° CGreenhouse plate (LxW): approx. 4 x 4.5 cmHole spacing plate greenhouse from