This hood fan was connected to an outdoor exhaust on the roof. Installation was fairly easy however I had to build a a sheet metal offset to connect to the existing exhaust duct work, The fan has plenty of power to pull cooking odors, steam, and smoke to the outdoors. The three fan speeds are quiet based on the volume of air they are moving outdoors. The 3 light levels allow you to adjust the brightness for the task at hand. The fan also looks great with our other stainless steel appliances and is an excellent value compared to the other high end hood fans.