[JRTJH]

The washer/dryer option is still not that common is many RV's. The cabinet is included as is the plumbing, usually as "standard equipment" but the vent isn't "cut in the side of the RV" in most applications. I'd suspect that it's because people who don't have, don't want or didn't order a washer/dryer would "find fault" with someone cutting a 3" or 4" hole in the side of their brand new trailer.... "I'm not buying that, my DW doesn't want a washer/dryer and I don't want a hole for mice to crawl into our trailer during the winter"......

So, the vent ducting may be in the cabinet, but I'd suspect the hole isn't cut unless someone "really does use the vent"......