How Can Mold Growth Be Inhibited; Effects Of Prolonged Occupancy - FOUR WINDS INTERNATIONAL 2007 Presidio Owner's Manual

CARE & MAINTENANCE

How can Mold Growth be Inhibited?

By controlling relative humidity, the growth of mold and mildew can be inhibited. In warm
climates, use of the air conditioner will reduce the relative humidity. Vents are located in the
bathing and cooking areas and constant use is advised during food preparation and bathing,
even during colder weather. Additionally, opening a window during these activities will assist in
ventilation. In extremely humid conditions, the use of a dehumidifier can be helpful.
NOTE: If using a dehumidifier, please read and follow all manufacturer instructions and
recommendations to the use and cleaning of the dehumidifier.
Ideally, relative humidity should be at 60% or less. Relative humidity can be monitored
utilizing a portable hygrometer, a small device that measures temperature and relative
humidity. Hygrometer's are available at electronics or building supply stores for minimal cost.
NOTE: In cold climates, relative humidity may need to be at 35% or less to avoid window
condensation.
Frequent use of the motorhome or cleaning regularly is an important preventive measure.
Further, any spills should be wiped up quickly and dried as soon as possible. Avoid leaving
damp items lying about. On safe surfaces, use mold or mildew killing cleaning products.
Check sealants regularly, and reseal when necessary to avoid water leaks. Proper preventive
maintenance to the motorhome and its accessories, as described both in this manual and in
accompanying literature, will provide the best protection to the motorhome.
For more information of controlling moisture in the motorhome, please read "Tips to Controlling
Condensation," located in this manual.
NOTE: If you have any questions about moisture-related issues in the environment you plan to
use the motorhome in for a majority of the time, contact Mandalay Luxury Division.

Effects of Prolonged Occupancy

Your motorhome was designed primarily for recreational use and short-term occupancy. If you
expect to occupy the motorhome 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 recreation vehicles mean that the normal living
activities of even a few occupants will lead to rapid moisture saturation of the air contained in
the motorhome 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 motorhome during cold weather when
relative humidity of the interior air is high. This condition is increased because the insulated
walls of a motorhome 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
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