I'll copy and psate my recent response to someone else with the same question..... There's a Kenmore OTR MW with a 600 cfm fan and a door that can open from either the left or right, although it doesn't seem to get great reviews. Worth a look, still - I like how the controls are all at the bottom. The LG units with the sideways-sliding tray rather than a turntable, and a pull-out hood are nice. Some of these have a 400 cfm fan. I've used several OTR Advantiums and they are probably my favorite due to their versatility and build quality (nice roomy stainless-steel interior, etc.). Also, 4 choices of styling (Cafe, Profile, Monogram, Monogram commercial-look). Get the the Profile or Monogram in black or stainless and you get a neat illuminated keypad too. The 240v versions of the Advantium work much faster and better as speedcookers and slightly faster as a microwave oven, but the same as a convection oven. Worth the added cost of the oven and rewiring for 240v/30a if you use the speedcook alot, but if you use it only occasionally the 120v will suffice.

Yes, this should work just fine. This is what we did. I love it and realize I am more comfortable at the stove without the microwave in my face! There are websites where you can narrow down choices with your dimensions very nicely. AJ Madison is the one we used. Ultimately, we didn't buy from them though. Our open space between the two cabinets was 31 inches, but there is a gap on either side of the vent that is at least an inch total. If we only had 30 inches it would have fit cleaner. The height from the counter top to the bottom of the upper cabinet above the vent is 33 1/2 inches. This puts the vent hood we used at 26 1/2 inches from the its bottom to the counter top. The hood you purchase should tell you the correct placement needed for proper operation. Our is a Sharp Insite. I love the lighting on it, its quiet, and can go to pretty powerful levels. Here it is in our kitchen. Ignore the strange green cast on the backsplash.That is not there in real life? Source: Uploaded by user via Marcella on Pinterest Source: Uploaded by user via Marcella on Pinterest

I can't see what is inside this flex vent, but asserting lack of elbows as an advantage when the duct is obviously elbowed shows a misunderstanding of causes of turbulence generation and resultant pressure loss. (Think of it as friction.) And smooth elbow pressure losses due to turbulence are unlikely to be as bad as the pressure losses due to turbulence generated by all those accordion folds. All that said, we don't know how wimpy the blower is in the microwave oven. If the flow rate (CFM) capability is very low even when dumped into open air, the exhaust duct irregularities will only have a modest effect. The space there looks a little tight from this perspective; perhaps the hole in the wall should have been higher to allow a standard duct shape elbow to work. kas

@Marta I had it made at a metal fabricator using my design and dimensions. It was about $100 and I used construction adhesive to glue it to the wall and tiny nails from inside the cabinet to inside the rolled edge to keep the shelf firm.