Bayliss MK7 Automatic Vent Opener

• Suitable for opening greenhouse roof windows 76cm x 76cm weighing up to 26lbs
• Designed to open the window automatically when temperatures increase
• Works by wax within the cylinder of the opener expanding when it's hot, pushing a piston to open the window
• When it's cool the wax contracts and stainless steel springs close the window.
• Suitable for aluminium or wooden greenhouses

Product description Automatic ventilation 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 Safety Warning Ensure to install and use the product carefully, keeping fingers and other body parts away from moving parts to avoid injury.

Ensure to install and use the product carefully, keeping fingers and other body parts away from moving parts to avoid injury.