what a beautiful addition this is to my kitchen it remade it to look like a custom kitchen instead of an ordinary run of the mill  cookie cutter kitchen for nrelatively low price.  the installation was simple (not complicated like i thought it would be). it is a convertible type(no exhaust vent through ceiling and roof needed if you dont have one already there) just  purchase 2 carbon filters $20  and put them on ,and it exhausts into kitchen ,cleanly. what a great idea .