[azasadny]

Whatever you do, don't vent with an overhead microwave oven with a fan installed! We made this mistake when we built our addition and kitchen 6 years ago and a couple years ago the $500 GE microwave died and I took it apart and it was completely coated in grease and was disgusting. We threw it out and bought a stainless steel Broan hood with a powerful fan and connected it to the exterior vent, so it vents outside and it's much better than the "microwave with a fan" option. Whoever thought of that microwave/fan combo just wasn't thinking. Even cleaning and replacing the screen/filter doesn't prevent the grease from coating every interior surface of the microwave, at least in the crappy GE model (Profile series). Good luck!