Keystone RV Camper Camper User Manual

Chapter 2: Effects of Prolonged Occupancy  
Chapter 2: Effects of Prolonged  
Occupancy  
Your recreational vehicle was designed primarily for recreational use and  
short-term occupancy. If you expect to occupy the coach for an extended  
period, be prepared to deal with condensation and the humid conditions  
that may be encountered. The relatively small volume and tight compact  
construction of modern recreational vehicles means that the normal living  
activities of even a few occupants will lead to rapid moisture saturation of  
the air contained in the fifth-wheel and the appearance of visible moisture,  
especially in cold weather.  
Just as moisture collects on the outside of a glass of cold water during  
humid weather, moisture can condense on the inside surfaces of the  
recreational vehicle during cold weather when relative humidity of the  
interior air is high. This condition is increased because the insulated walls  
of a recreational vehicle are much thinner than house walls. Estimates  
indicate that a family of four can vaporize up to three gallons of water daily  
through breathing, cooking, bathing and washing.  
Unless the water vapor is carried outside by ventilation or condensed by  
a dehumidifier, it will condense on the inside of the windows and walls as  
moisture or in cold weather as frost or ice. It may also condense out of  
sight within the walls or the ceiling where it will manifest itself as warped  
or stained panels. Appearance of these conditions may indicate a serious  
condensation problem. When you recognize the signs of excessive  
moisture and condensation in the coach, action should be taken to  
minimize their effects.  
To Avoid Condensation Problems, Follow  
These Tips  
Allow excess moisture to escape to the outside when bathing,  
washing dishes, hair- drying, laundering and using appliances and  
non-vented gas burners.  
Always use the vent hood when cooking.  
Keep the bathroom door closed and the vent or window open  
when bathing and for a period of time after you have finished.  
Do not hang wet clothes in the coach to dry.  
In hot weather, start the air conditioner early as it removes excess  
humidity from the air while lowering the temperature.  
Keep the temperature as reasonably cool during cold weather  
as possible. The warmer the vehicle the more cold exterior  
temperatures and warm interior temperatures will collide on wall  
surfaces creating condensation.  
Use a fan to keep air circulating inside the vehicle so  
condensation and mildew cannot form in dead air spaces. Allow  
air to circulate inside closets and cabinets (leave doors partially  
open). Please keep in mind that a closed cabinet full of stored  
goods prevents circulation and allows the exterior temperature to  
cause condensation.  
The natural tendency would be to close the vehicle tightly during  
cold weather. This will actually compound the problem. Simply  
put, you need to remove some of the warm air and allow some  
cool outside air to get inside the vehicle so the furnace will not  
recycle the humid interior air.  
Use fluorescent ceiling lights and minimize prolonged use of  
incandescent lights, which produce heat and contribute to  
condensation in the roof above the ceiling lights.  
9
 

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