Nice hood I wish it fit just a little bit tighter in a normal 30” opening. Actual width is 29 3/4. Doesn’t seem like 1/8” on both sides should matter, but I prefer a tighter fit. This was installed as a ducted unit, and the existing duct was a 6”, so a 5”to 6” adapter was needed. It would be nice if the fan came with a hose clamp. The fan is very quiet on low and quiet on the higher settings. Suction was adequate, it held a 1/2 sheet of paper towel when on high. I’m a pro account user and have installed many exhaust hoods. This was a good value for the money.