I just purchased a 2017 SL 273. I have had 3 other octane 24Z and 26 Y. My question is after crawling under my new trailer to see why all the wires were hanging down no nuts on any of the gray or black tanks. no big deal I figured out were they went and purchased new nuts all good. But my question is why is there a vent hole approx. 5 to 6 in. wide and 12 to 16 in. long with a screen over it with approx. 1/4 holes in screen so water off road or any bugs can go in side it goes up into the cabinets. It has been done on purpose it is lined with tin, like a cold air vent in house. Maybe for furnace vent. But this is my 4th octane and the first to have a vent hole in bottom. I want to put a coarse foam that would flow air. But what is it for. Please help.
Thanks that was correct the 273 the refrigerator is in the middle of trailer I took bottom panel off below refrigerator and it is the vent. And also one on roof. I am going to put some kind of filter of smaller screen under their screen that has 1/4 in. holes to keep bugs out. Thanks Mike