Ellovent™ Special Autovent, Heavy Duty Greenhouse Vent Opener

Very easy to install and it works, what more can you ask for. Seems to be made with quality materials so longevity shouldn’t be an issue only time will tell

This is a sturdy, powerful, autovent. It works well. I've knocked a star off because the instructions could be better! They refer to a hole on the autovent that is not even on the product, and generally are not very helpful. Perhaps it's the translation from the original Danish? I don't know.The product is really good, once you've figured out how it is best to fit it. I recommend the product, but not the instructions in English.

Previous reviews suggest drilling is not required, however, on my polycarbonate greenhouse I needed to drill holes on the upper window frame to get the brackets to line up in the correct way so that the window opened.My initial installation using just the brackets didn't work - the hinge was either stuck shut or stuck open depending on how I attached it. Watching the YouTube video is a must before you start as it's really useful and ultimately led me to realising why it wasn't working and that I needed to drill two holes to attach the bracket in the correct place.Now it is fitted correctly it feels very sturdy and works really well. Happy with my purchase and it looks like it will last a long time.

Easy to replace existing vent which had failed due to age.

I've recently fitted four of these on my new greenhouse. They feel sturdy and well made. Simple to fit although the diagrams maybe make it look more complex then it is. They are working perfectly during this season when the weather changes every 30 minutes. Excellent value.

I had no problem assembling this of attaching it to the greenhouse. However, one part did not articulate as it should and I had to file a tiny bit off to make it work.Since my minor modification, it has worked consistently well.

Bit expensive, but you get what you pay for and this is a quality item. Works wekk, easy to install

I needed (well, would have liked) a larger G/House. my existing one was only 4ft* 4ft.But available space dictated. So I removed one side and added a timber frame extension. Incorporated a window (the original 4*4 didn't have one) and fitted the window opener. Very pleased with it. Easier to fit than I thought it would be.

Utilisé pour une serre fait maison en bois et polycarbonate de 16Sert ouverture fenêtre de mur et non de toit pour ventilation automatiqueRemplie parfaitement son rôleJe n’ai pas mis 5 étoiles car grosse perte de temps au montage car le trou qui sert a la goupille qui verrouille le vérin a gaz était trop petit pour y fixer la goupilleC’était infime mais suffisant pour empêcher la fixation de la goupille : obligé d’agrandir le trou avec un petit foretSinon a voir dans le temps !!J’ai apprécie avant l’achat la réactivité et le conseil du vendeur sur le modèle a choisir pour le type de montage que je voulais utiliser