What are automatic greenhouse window openers?

Greenhouse window openers and vents are perfect for keen gardeners which will keep a vital temperature for any avid gardeners, with automatic greenhouse window openers the handy gadget means you can be absent from the garden and your plants will not be spoiled by too much heat. The greenhouse window openers operate using a piston in a tube to help automatically open the window depending on the set temperature. Being completely environment-friendly automatic greenhouse window openers are a must-have for any gardener.

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XL Budget Information

This is a budget “clip-on” model competitively priced perfect for large greenhouse window openers.

  • Lifting a load of up to 5.5kg (12lbs)
  • Maximum opening of approximately 300mm (12″).

The unit measures 280mm (11″) in length and is supplied in satin anodised finish only.

They are designed and tested to last for many years and are fully serviceable.

Please note that additional parts may be required to fit XL autovents to Halls, or Robinsons greenhouses please contact us for details at [email protected]

MK7 Standard Information

Designed for aluminium or timber framed vents greenhouses measuring up to 60cm square (2ft square)

  • Lifting a load of up to 6kg (14lbs)
  • Maximum opening distance of 300mm (12″)
  • Can be set to start opening at approx. 12°C (55°F).
  • Supplied with full fixing kit and instructions.

The standard Mk 7 autovent is supplied in a satin anodised finish but is also available epoxy powder coated white, green or brown to special order

MK7 Super Information

Similar in design to the Mk 7 model but larger

This model is suitable for opening heavy greenhouse vents

  • 400mm (15½”) overall length
  • MK7 Super has a unique, ultra strong, finned aluminium power tube
  • Internal and external fins to give more efficient heat exchange between the wax inside the tube and the surrounding air.
  • It opens a vent exerting a load of up to 15.9 kg (35lbs) approx.
  • 15 inches at full stretch
  • Operates between 16°C (60°F) and 25°C (75°F).
  • Available epoxy powder coated white or brown as standard
Can’t see what you’re looking for?

We understand that it can be near impossible to know if a product is compatible with any particular window.  That’s why we provide a free consultation over the phone with our technical sales team.

We’ll work with you to offer you the right product for your requirements.


Download our greenhouse auto openers selection guide.

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