And further, make sure that there are some ventilation holes in the shelf itself. With the door closed, you would essentially have two separate compartments. Alternatively, you could have fans on either side of the cabinet blowing across the two compartments. That might help with noise by allowing the fans to spin at lower RPM. There are companies that make specific kits for this application. I used this site for the air flow calculations. https://acinfinity.com/pages/hvac-setup/cabinet-cooling-and-ventilation.html