A:Answer Hey there, and thanks for reaching out to us about this over-the-range microwave! We understand your concerns over venting, and are glad to assist. If you do not have a separate exhaust hood, there are still multiple options for venting - you can recirculate, exhaust outside through the top, or exhaust outside through the back. More detailed information is available on these options starting on page 11 of the Installation Instructions. If you need to review those instructions, you can find them on our GE website by searching for the model number and clicking on the product page. If you are planning on recirculating to vent specifically, there would be one cover plate installed on the back of the unit and one over the blower plate on top; we would recommend reviewing the diagrams in the installation instructions regarding this, to ensure venting is not adversely affected. We hope this information is helpful, and are happy to assist with any other concerns or questions. Best wishes! -Sarah@GEA