All ActivityMost RecentMost LikesSolutionsRe: What goes in there?Thank you all for your posts. I have ordered a new detector and will not use the Motor Home until it is installed. Thanks again.What goes in there?I have a 99 National M6350. On the post (narrow wall just outside the bathroom) where the heat/ac, tank levels, and the CO Detector are located, there is a rectangular hole at the bottom of the post (narrow wall just outside the bathroom) that is about 2 inches up from the floor. It is the same size as a electric box and there is a green wire and a red wire inside the box. My question is, what is supposed to go in that hole? Any help will be greatly appreciated. Thank you ALL in advance. JohnRe: Fresh Water Tank CapacityThank you all for your help. I was able to find the info by going to Fred's link. FYI: This fresh water tank is 90 gallons. JohnFresh Water Tank CapacityHi, Can anyone tell me what the fresh water capacity is on a National RV Model M-6350? Thanks in advance. JohnRe: 1999 Natianal TropiCal RVThanks Mr. Smith. All help is appreciated.Re: 1999 Natianal TropiCal RVThanks Doug.Re: Replacing Roof Top A/C unitsI cannot locate my AC manual for my 1999 M-6350 National RV. Which brand will replace my existing units? I don't want to modify the existing hole in the roof. Does anyone know what the roof hole size is on the 6350? Thank You in advance.1999 Natianal TropiCal RVHi, I recently purchased a 99 M-6350 National RV. Unfortunately, I did not get the book on the AC. I am needing to replace them and I have no idea what the current units are. Does anyone have the book and give me the answer. I am needing to know the original roof hole size before I can order new units. Thank You in advance.