Having a small kitchen and not a great exhaust, solutions like fan windows are great, but all too often they are small and have to sit below the window. That means that when it rains or cold out, you have to remove the fan to close the window. This fan stays in the window year round but allows you to open and close the window without having to remove the fan!  Not only that, it's very powerful and VERY quiet.  Cooking smells are eliminated very fast with the three speed reversible motor. I even let my smoking friends sit at the table when they light up because not a particle of smoke enters the house with this fan running.