Just installed 2 Gigavent openers in my greenhouse. Both vents are 2 ft x 8 ft. The Gigavent has worked well. Installation was a bit of a chalenge but with a piece of 2.5 in angle aluminum I was able to make brackets that made installation easier. It appears that the Gigavent requires 2 surfaces to mount on which are 90 degrees from the opening direction of the vent as shown in the instructions. It would be nice to have installation on at least one surface which is along the surface of the vent. The aluminum angle piece solves this problem. Overall I am pleased with the Gigavent. It replaced a Bayliss unit which is a little more than half the price but basically a piece of junk. The Bayliss worked for a couple of years then gave out and even a cylinder replacement only allowed 1 more year of spotty performance. The action of the Gigavent is much smoother and opening and closing is silent, unlike the Bayliss.

The Gigavent is a great product that allows me to control the heat in my greenhouse. The simple heat/solar technology makes it all the better. The only downside is that the heat-activated pistons eventually give out and the occasional wind gusts bend the mechanisms. For me, a small price to pay for the benefit I get. ACF has this product(s) at a good price and ships fast. What more could you want?

The illustration is different than the photo. Instructions say vaguely how it works and what the parts do. There are no step by step instructions on how to install it. It would be most helpful to have a video link. I found a video on a different vent opener and it had more info than your instructions but since it’s a different product it was not very helpful either.

Wow they are over sized for my greenhouse but not your fault I ordered them. I’m returning asap.