84 VENTILATION marinco.com TECH tip Ventilation Explained A C B To specifically calculate your RV's air volume, use this simple formula: A x B x C x 70% = RV Interior Volume A Dimension is the interior length (excluding cockpit) B Dimension is the RV width C Dimension is the average interior height Maintenance Ventilation In most climates, RVs that have been closed for a period of time will become “stuffy.” The temperature differential that develops between the RV cabin and the outdoor environment will cause the humidity level inside the RV cabin to rise. When the humidity level in the closed cabin rises, moisture forms, resulting in mold, mildew and musty air. In these conditions, fabrics and/or RV electronics can be damaged. By consistently replacing trapped, stale air in the closed RV with fresh outside air, the humidity equalizes from inside to outside, resulting in effective maintenance ventilation. Comfort Ventilation Combining different types of vents, with one vent providing “intake” air flow while another vent provides “exhaust” air flow, creates crossflow ventilation. A cross-flow ventilation system will make the interior cabin more comfortable and pleasurable because air is constantly moving throughout the cabin. No matter what your RV size or cabin configuration is, you can increase your RVing enjoyment with the addition of ventilation. Safety Ventilation Most RVers are unaware of the hazards that exist in the RV environment. Any number of serious ventilation problems can occur when an RV is left unattended. And even if you are ont the road, these problems don’t go away. Fumes and gasses, ranging from carbon monoxide to hydrogen gas from battery charging, to gasoline, propane, or solvents are unpleasant, and can sometimes be dangerous. Also, any open flame devices in the cabin require proper ventilation. Ventilation helps to eliminate these hazards by providing constant air circulation resulting in effective safety ventilation. How Much Ventilation Is Required For Your RV? Ideally, the air in the interior of a RV should be circulated once every hour. A typical 30-foot RV contains approximately 800 cubic feet of air. As you will see, our solar powered models can move between 600 and 1,000 cubic feet of air every hour. The general guidelines for providing maintenance ventilation are as follows: RV Length Up to 24 ft. 24 to 40 ft. Recommended Ventilation 1 Exhaust Vent* 1 Exhaust Vent & 1 Intake Vent * For effective maintenance ventilation, one vent assumes there will be access for air to get into the cabin (i.e., fan vent, clamshell vent or louvered panel) Primary Ventilation Primary Ventilation It is important to evaluate the cabin layout of your RV to determine optimal locations for both intake and exhaust ventilation. These illustrations suggest placement for Marinco® solar powered vents and Marinco passive vents. Note how the placement of the vents creates cross flow ventilation.
RkJQdWJsaXNoZXIy MjgzMDI=