The Megavent Storm Heavy Duty Automatic Greenhouse Vent Opener

Opens and Closes Greenhouse Windows Automatically

Double Springs, Double Arms and Hydraulic Damper give exceptional protection against wind damage

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.


Technical Data:

  • Maximum window opening approx 40cm (15 3/4 Inches)
  • 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 12kg which equals a window weighing 24kg (52lbs)


Manufactured in Aluminium & Zinc coated steel for long trouble free life. Attractive silver finish blends well with traditional aluminium greenhouses.


We also stock many other quality Autovents from other manufacturers and side louvre vent openers as well as spare cylinders for all our autovents, we show this item amongst many many others in use at our massive show site in Yorkshire where we show case the finest greenhouses, summerhouses, sheds and accessories

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.