Bayliss 2 x XL Autovent Automatic Greenhouse Window Opener

Working perfectly from the start. I decided to use 2 Bayliss XLs on one long polycarbonate panel, weighing at 10 pounds. I thought that if either actuator failed it would be "tattled" by the other. On each end, a chain runs from an arm on the vent panel down to a sliding vent panel at the bottom of the greenhouse. - When the panel opens, so do the bottom vents. My son in law deserves credit for his artistic build of this greenhouse for my daughter. Thanks Matt PHOTOS included. Bayliss is a precision product. Wyman Cooper Nevada USA

I have 8 working flawlessly now, and have had zero troubles! i don's know how i lived without these! my only complaints are that the threaded rod could be threaded further down to allow for higher opening temps, overall the unit could be heavier duty, and the plastic. all metal and then the parts that take the most pressure, the screw plates, are plastic! i hate plastic so much :(

Just as advertised and works perfect

These exceeded our expectations. They were a little difficult to install but we are happy with this product. Well constructed!

Needed modifications to fit Costco (Palram 8X12) greenhouse. Once modified it works well.

I was fitting these to a second hand Halls Supreme, and expected the holes from the catch to line up with what I needed for these. They didn't, and they weren't the right size holes either. But I started with one of the old central holes, widened it to fit the new bolt, and put it on with only one bolt. This gave me a good fighting chance of establishing a second hole on both the cill bar and the window frame. I drilled these new holes firstly with a small bit as a guide hole, and then the bit commensurate with the diameter of the bolt. That all went well, the only tricky bit was the dexterity needed to locate the window nuts on their bolts, but I got better at that! The whole job is made much more difficult by being mainly above head height, so anything you can do alleviate this the better.I found that separating both the cylinders from the brackets straight off and putting them in the fridge as directed was the best way to go. The spring on the brackets are VERY assertive, and dealing with them when I needed to open the bracket up was challenge enough, without concern for the cylinders. Unclipping and reclipping them is much easier than I was expecting.... I think the instructions would be wise to reflect that better.For neatness I trimmed the superfluous bits of the fitting black plastic pads on both the window and the cill bar side. Refitted the glass (cue memories of David Warner's untimely end in the Omen!!!), and refitting the cylinders after pushing the bolt in as directed, and on a hot day one went off straight away and was six inches open, the other was a bit lazier. I was convinced I'd damaged the cylinder, and started sourcing a replacement, but it now is fine. Can't explain that. Not terribly convinced that I have adjusted them all as per instructions, but they open and close magically!So excellent quality, great value for the two, but a bit of skill and guile needed to fit it to a fairly standard Halls greenhouse. More to the point my wife, the gardener is delighted, and is wondering what to do with the time she will save! I was always concerned about the rather pathetic window catches as supplied on the Halls, and had visions of her walking into one and having an eye accident, so I was delighted to get rid of them.

Produce looks good but I only get one unit and keep having to send it back as I am paying for 2.

tres bien pour les flemmards comme moi qui ont la flemmingite aigue d'ouverture de velux . il le fait tout seul a partir de 26 degré

We inherited a Red Cedar greenhouse when we bought our current house 20 years ago which came with Baylis automatic vent openers. I don’t know how old they were but obviously more than 20 years so I thought I would buy the same ones as originally fitted. The originals had “Made in England” on them and I note the new ones don’t have any country of origin on them but I found them easy to fit and they work well so no complaints. They have only been on a week so far but if they last as long as the ones they are replacing I will be very happy.

Quel bonheur ce produit . Sachant qu'un seul oubli, et vous retrouvez vos légumes cramées, ce produit est votre compagnon fidèle…