Are the widows sweating? If they are, then yes you need a bigger dehumidifier.When we had the motorhome we camped almost every w/e in michigans up (snowmobileing) for about 10 years. Most dehumidifiers do not work efficently below 50 deg,and not at all below 40 deg.For this application you need a "low temp dehumidifier". They work well down to 35 deg. Google that and a bunch of them will come up. They are a bit more expensive,but so is the interior of your coach when it rots!We had a heated basement and did not use one of the top bunks, so I set it up there,close to the cieling, and ran the drain hose into the heated basement so it couldnt freeze.Even with my wife and the 2 kids in there with all the wet sled cloths,we never got any condinsation. I forget what brand it was but its still in there.The MH has been stitting for 10 yrs or so,but I'd bet the dehumidifyer would crank right up.