I have installed range hoods before, but this hood didn’t have all the appropriate screw holes to install vent attachment. Only 1 screw hole, yet they give you 4 screws to install. I had to metal duct tape to secure to hood. Took 3 hours to install by myself. Now that it’s in... looks good and works, but fan is noisy when you turn it on and the off. While on it’s ok. Frustrating!!!