On my Monaco coach, it came with the convection microwave. It also vented to the inside of the coach. I searched for the model number online and found out that I could buy an inexpensive adapter to vent it out the rear of the cabinet. I removed the microwave, cut the hole in the wall, installed an exterior vent cover, that hinged out when the vent was on, and reinstalled the microwave. I have used it like that for several years now and it also gives me the advantage of being able to vent odors and heat when I am using the stove as well.