While I agree we don't vent our Home residential Frig's but then again my home is not a "hot" box. I can only tell you my experience....I originally closed off the rear vent, I placed a couple of exhaust fans pointed upward toward the roof vent and a put a vent under the platform for the refrigerator. While doing all this, I placed a wired thermometer inside the cavity at the back of the refrig. During hot days(over 100 Degree's) the temp in the cavity can climb into the 120's easily. Simply by turning on the exhaust fans, I can reduce that temp by 30+ degree's. The outside vent I normally leave cracked a tad(it's a sliding piece of wood) so I can open it fully or close it fully depending on the climate.
Here again, my experience, the efficiency of my Residential fridge at 90 degree's opposed to 120+ is greatly improved, don't care how you look at it! I actually insulated the sides, the rear and the top portion of the enclosure. It's worked like a charm since I installed it some 4 + years ago.
PS....My fridge is not one of the fancy ones, it's a 10.4 CF 2 door(hey, I have an older MH and didn't have the room).
