Product review (2 stars): Quality not up to expectations.
It's a powerful fan unit although a bit noisy. Like some of the other reviewers, we were disappointed in the quality of the manufacturing and shipping packaging. Two of the visible edges were bent,  a bolt and nut holding the fans in place had come undone and were rattling around in the unit. In addition, one of the plastic electric boxes had a tab broken off and could not be secured in its intended state. We had the installer onsite and could not send him home without cost to us. Therefore he and I straightened the edges as best we could, found our own bolt to replace the one, and gorilla taped the plastic box.  In other words, we made it work out of necessity.  That being said it looks and works great but be prepared for some disappointments in getting to that state.