My 2007 Whirlpool has coils in the back. I left the two legacy vents on the RV Sidewall in place. They've essentially waterproof and what else could I do with 2 holes in the wall? I've got the Fridge sealed up inside/the front, so that's the only ventilation it gets. I did re-install the old Dometic RV Fridge "pancake" fan between the 2 outside vents where it was before. I've never heard it run and I did successfully test it before re-installing, so it must never get too hot back there even when that side of the RV is in the sun.