I believe the Miele microwave might work, we have owned one and its a great built-in microwave. It does not vent out bottom though.

Oops- sorry missed the OTR part of your post.

Here is a link that might be useful: Miele Microwave

This post was edited by xc60 on Tue, Jan 14, 14 at 15:09

If you are just using it as a faux built in MW, and you aren't using it as a vent, you just don't turn on the vent. So, it doesn't matter where the air comes out and it never sucks the air in.

If you are using the MW as a vent, then it hooks up to a vent pipe, and again, you needn't worry about where the air goes as it goes out the vent.

If you are using the OTR to recirculate over a range, then after telling you that there are MUCH MUCH better choices, I'd tell you too look at one with a front vent as opposed to a top vent. Most of the lower cost models vent out the front, not the top.