The Ellovent™ Special Heavy Duty Automatic Greenhouse Vent Opener

Opens and Closes Greenhouse Windows Automatically

Double Springs and Double Arms give extra protection against wind damage

Unique easy clamp feature allows the bottom of the autovent to be disengaged instantly in the event of severe winds or to allow manual opening in winter.

These high quality automatic openers are proudly made in Denmark and are fully guaranteed for two years. Please do not confuse this item with any of the cheap far east copies which are not made to the same standards.

Fits directly to roof vents and slam bars of standard Aluminium Greenhouses without the need to drill anything. High quality clamps fasten directly over your bars and tighten in place, these units can be fitted in minutes.

Technical Data:

  • Maximum window opening approx 45cm (17 3/4")
  • Maximum opening at 30˚C (86˚F)
  • Opening start temperature easily adjustable between 17˚C - 25˚C (60˚F - 77˚F)
  • Can lift up to 7kg which equals a window weighing 15kg (33lbs)


Manufactured in aluminium for long trouble free life, the shiny finish blends well with traditional aluminium greenhouses.

These could make perfect gifts for greenhouse growers, botanists and horticulturalists


We also stock many other quality Autovents from other manufacturers including different coloured powder coated options and side louvre vent openers as well as spare cylinders for all our autovents, please enquire with us if you have any questions. 

Please look at our other items in our ebay shop


We are a specialist greenhouse supply and build company based in Yorkshire that sells nothing else but quality greenhouses and accessories. We do not sell hundreds of lines that we know little about, we have tried and tested everything we sell and are completely confident in our products and service

Many thanks for looking.