give stable temperatures. You need a quarter of the floor area in opening vents. Wax operated Vent Openers, the hotter it gets the wider they open. Designed to open your greenhouse window automatically. It works by a wax within the cylinder of the opener expanding when it is hot, pushing a piston to open the window, when it is cool, it contracts and stainless steel springs close the window. It is suitable for aluminium or wooden greenhouses and is supplied complete with easy to follow instructions for simple installation Adjustable to start opening anywhere between 12° – 25°C. Supplied with full fixing kit and instructions. Supplied in a satin anodised finnish
Part number:- MK7
Manufacturer:- Bayliss
Item model number:- MK7
Date First Available:- 24 Jun. 2009