Once u buy from online, especially a chimney, most of the company installation guy will ask you to make an exhaust hole in your kitchen wall with a pvc pipe, and you will be surprised to find out that he is just there to hook the chimney and plug it and that's called installation!!! So if u buy it from a store, you can ask them to send somebody to do the civil worksike exhaust holes and pvc pipes. We have an installed island chimney in the below glass kitchen