Auto Vent Opener Automatic Greenhouse Window Opener Cylinder Roof Vent Opener Autovent Kit Solar Heat Sensitive Agriculture Gardening Tools Automatic Greenhouses Supplies (Single Spring Lifts 15 Lbs)

For me, the enclosed directions on the instruction sheet were a bit confusing and I wish I had a third hand while working over my head to attach these to the window frames. Once installed though, they work like magic! I’m pleased with the value for the money and how efficiently these work.

They work great! I have had these for a number of months. I no longer need to worry about opening and closing the greenhouse roof vents

Easy assembly. Instructions are a little confusing about the braces. Didn't need em. Metal is a little thin so I'm concerned about wind gusts on sunny days.

The canister leaked. I stull tried to get it to work. It snapped back and hit me in the chest... snapped on my thumb...If I had a few extra arms and it didn't leal maybe I could rank higher. But the instructions were awful and the install a nightmare.

I added this to our greenhouse kit at the start based on others' reviews. It opens when the temperature inside goes up and closes when the temperature goes down. It was simple to install and is adjustable. I did find a video online that further helped explain installation. I would definitely recommend.

An absolute must for any greenhouse work amazing

Easy to install. Worked fine for about 1 year. Stopped working almost exactly 1 year after. Not sure how long they're meant to last.