Air-Duct Cleaning

I don't know what equipment they would use but it wouldn't hurt to call them and ask them if they have experience with RV ducts and also ask them if they can clean ducts that are non-rigid as I believe much of the duct work after the furnace plenum is probably vinyl duct. Do you have ducted AC as well? Have you run that duct work? Finally, I would consider doing a fumigation of your coach just to make sure all the bugs are dead. Avoid the aerosol type fumigators. I would consider using Raid House and Yard Fumigator as it is easy to use and I believe does a much better job than those aerosol fumigators.