A:Answer Hey there, thanks for reaching out. It seems as if you're describing an over-the-range microwave. If so, you'll be pleased to know that all 30" over-the-range microwaves are approximately the same width and are designed to fit into a 30" wide cabinet opening. Therefore, any of our 30" over-the-range models will work as a replacement for an existing 30" over-the-range model. If this is not the case, we suggest reaching out to us on social media so that we can best assist you. We hope this helps! - Guy@GEA