We purchased this from Lowes. Had it in our kitchen for a few years. Never even used it enough to have to change the charcoal filters. You can also have the frame if you want it. The frame is 30" x 18 1/2" We sheet rocked the frame and added a light limewash to it. It looked great! I also have an extra grill that is brand new and still packaged.

Here is the link for details: https://www.lowes.com/pd/Hauslane-30-in-Convertible-Stainless-Steel-Undercabinet-Range-Hood-Insert-Common-30-in-Actual-29-4-in/1002716050