Product review (4 stars): Did the job...
Just what I needed to move my stackable unit as close to the wall as possible in a small space. I was able to install myself, though it was quite a feat to do so. My unit is in a corner, and the vent hole was drilled into the wall to the specifications of a previous unit. Although this vent is adjustable, and it did adjust to fit the new configuration, it was really hard to install while following the directions provided. I ended up having to measure, re measure, then dry fit the vent. I then removed it from the vent holes, stabilizing it so that it didn't move, and taped it around all the edges with heatproof metal tape as other reviewers online have recommended. Since it was in the corner, I had have my husband tilt forward the stackable unit to reach the back for most of the install, then contort myself into the gap to finish tightening the couplings and taping them to prevent air leaks. Might have been easier with a standard dryer, but its what I had to work with. Not all of this was this product's fault, of course, but if I do need to do it again, I will leave it to the professionals, I think!