We installed this in my Palram 8x8 Snap and Grow greenhouse. I had read some reviews that stated that it did not fit correctly when trying to install it. Most people used a Dremel to shave down part of the opener to make it fit. We had to do the same and I was worried that it might not open the window now. The first day that the sun came out, I looked outside and the window was open. That evening I watched as it went back down. Love this thing!
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