This is a great, interesting topic. Not certain what Rojo08's reasons for wanting the dehumidifier (other than simply removing moisture), but I have a huge concern over being able to stay on top of any odor problems that will most certainly result due to the moisture and humidity levels here in the Pacific Northwest. I am very apprehensive about our new Big Horn ending up smelling like some of the used RV's we looked at prior to our buying this new 5'er this past fall. Many, if not all of the used RV's we entered on RV lots in the Seattle area reeked with a musty odor. That fact alone, closed the deal on our buying a new unit. My fear now, is to keep that musty odor out of our RV. Currently, we are running the propane furnace in the unit, but keeping these propane bottles filled is getting a little old. As noted in other threads, I think many owners have voiced their opinions on using small electric heaters to keep lines and drains from freezing over the winter. This would also help to keep the humitity level lower. A thorough winterizing of our RV is out of the questions as we also head over to the Pacific coast when time allows during the winter months. I feel the dehumidifier is the route we are going to take to battle the odor problem, and the Frigidaire looks to be a good solution.
larrykeever made mention in his reply, to the question about "humitity levels" in the PNW, and I can assure you, having spend my first 30 years in Iowa, and my next 34 years in marine, or near marine environments in the PNW and Alaska, there is a hugh difference between the humidity in the midwest, and that found in the PNW.
Appreciate all of the good responses from other owners, as it gives good basis for decisions on handling specific problems and challanges with our 5'er. GlennB.