mmm, con un aparato enchufado en continuacion, algo mas que tener en mente y con un asterisco de atencion al dato.
Si estoy en lo correcto, el agua condensa cuando ese aire del interior, estancado y poco renovado, se satura y no admite absorber mas humedad. Otro elemento confluyente es la diferencia de temperatura del interior de la cabina, afectada por el ciclo solar diario y la temperatura exterior por la del agua y las brisas
Yo intentaria crear una buena corriente de aire a traves de la cabina, utilizando incluso ventiladores de baja potencia alimentados por energia solar y complementado el sistema por las sales ACME...Igual es suficiente, y sera siempre mejor intentar noproducir condensacin, que recoger el agua de toda la que se genere... aunque me da que en Bilbao si hay condensacion, sera mucho mayor que en cualquier lado del mundo ..
A trouble-free method of providing excellent closed-cabin ventilation on any boat is a pair of water-trap-mounted cowl ventilators, one facing forward and one facing aft. In nearly all conditions, this configuration sets up a beneficial flow of air in one vent and out the other.
For continuous closed-cabin ventilation, the ideal ventilator may be one with a solar-powered fan. Powered vents use an integral solar panel to run the fan during daylight and, in some units, to recharge internal batteries that keep the fan running after dark. Paired with a cowl ventilator or a sizable louvered vent, a single solar-powered exhaust vent can extract a volume of air every hour equivalent to the entire interior volume of a 30' boat. Not only is this good for your boat, but it makes going aboard on a hot day noticeably more pleasant.
All vent installations are essentially the same, whether louvered, clamshell, cowl, or solar. You determine the appropriate location, cut the appropriate opening, carefully seal the edge of any core material your cutout exposes, and mount the vent over the hole. Where the vent opening is exposed below, a trim ring completes the installation. More detailed instructions can be found in How-To #32 (Item 911032) titled "Installing Hatches and Deck Plates." For the most effective ventilation, be sure there is plenty of separation between intake and exhaust vents.
Ventilating lockers
Getting fresh air into the cabin is the essential first step, but you also need to ventilate all the closed compartments inside the cabin. It is for ventilation that locker doors on boats are often louvered or given cane inserts. Solid locker doors should, at the very least, have a pattern of slits or holes or a fancy cut-out. It is usually a good idea also to cut vent holes at the back between lockers to give each locker that "two window" configuration that fosters good air flow.
When you are off the boat, leaving cabin and locker doors partially open is the easiest and arguably the best way to ventilate enclosed compartments. Of course, unlatched doors are at risk of swinging and banging with the motion of the boat, but the solution to that is easy and inexpensive. Simply install a latch hook on the inside of the door frame and screw the eye to the inside of the door. This lets you latch the door slightly ajar. If a standard latch hook doesn't hold the door open enough to satisfy you, it is a simple matter to make longer latch hooks with a couple of screw eyes and a length of stiff wire.
Latching all the lockers ajar when you leave the boat takes only a minute, and it admits not only air, but mildew-slaying light into the locker. Try it. You'll like it
How Much Ventilation is Required for Your Boat?
Ideally, the air in the interior of a boat should be circulated once every hour. A typical 30’ boat contains approximately 800 cu. ft. of air. The general guidelines for providing maintenance ventilation are outlined in the chart below.
Boat Size Recommended Ventilation
Up to 24’ ------------------1 Exhaust Vent*
24-40’ ------------------1 Exhaust Vent & 1 Intake Vent
40’+ -------------------2 Exhaust Vents & 1 Intake Vent
*One vent assumes there will be access for air to get into the cabin (i.e., cowl vent, clamshell vent, or louvered panel.)
To specifically calculate your boat's air volume, use this simple formula:
A x B x C x 70%=Boat Interior Volume
A The interior length (excluding cockpit)
B The boat’s width
C The average interior height
by Don Casey
