Currently, I have a Broan Micromate that I would like to replace with a zephyr that was purchased on Craigslist. I can't find anything on the web about the micromate. It has a motor encased in the top cabinet, but I'm not sure if it is vented or self ventilated. Does anyone have experience replacing these with a modern Range hood? If so, could you let me know what the process was? Any information up front would help tons!