Bayliss Greenhouse Autovent

Reliable, quality built anodised aluminium automatic window opener for greenhouses. |Clamps onto most aluminium greenhouse vents no need for drilling. |Can also be used for timber framed vents. |Will fit a window weighing 12.5kgs (28lbs), exerting a load of 6.5kgs (14lbs). |It is temperature adjustable and can be set to start opening the window from 13 18C (55 -65 F)