Extreme heat outside - Cool climate inside Enjoy the refreshing feeling of an air-conditioned cabin.Boats are your passion, and ours. On the open sea the sun heats up your body quickly. Enjoy the sun outside and cool down below deck whenever you need to feel refreshed. Relax while a Webasto Air-Conditioning system is working for you. Our large product portfolio of self-contained air-conditioning systems up to large chiller systems leaves nothing to be desired. With our wide power range we provide cooling capacities from 5,000 BTU/h up to 572,000 BTU/h. It is up to you to decide which technology is best suited for your boat or yacht.The thermal gain of your boat varies greatly during every 24 hour period, and peaks when the sun is at its maximum strength. You must at least equal this otherwise the temperature inside your boat will go up rather than down when you close it up and turn on the a/c at noon. If you undersize your load you will be very uncomfortable and unhappy with

your system when you need it the most! Significantly oversizing the system will result in system "short cycling" - not giving the system adequate run time to satisfactorily dehumidify the vessel. The general rule of thumb for sizing a pleasure boat is using the formula of 14BTU's/cubic foot (480 BTUs/cubic meter) of air conditioned space. This factor is for typically constructed pleasure boats and should be adjusted if non-standard construction techniques have been It is prudent to use a factor of 16 to 19 BTU's/cubic foot (550-650 BTUs/ cubic meter) for areas that are used during the heat of the day that have a lot of sunlight coming in - for example a pilothouse, especially if the roof is not shaded or well insulated. For areas below deck that are primarily used after sunset such as a stateroom, you can usually drop this factor to 10 - 12 BTU's/cubic foot(380-410 If you plan to air condition

the vessel only in the evening hours, or if your boat is under a canopy and out of the sun, you can typically use a factor of 10-12 BTUs for the entire vessel. In many installations we have designed systems that will cool the main salon during the day and the entire boat, including the staterooms, in the evening by using multiple ducting with closeable grills combined with a more powerful blower motor. This frequently results in a single system accomplishing what you would typically need two systems for, saving you a lot of money and frequently eliminating the need for an additional shore power service. about 10 BTUs/cubic foot after sunset, therefore if entire capacity of a single unit to the main salon only, during the day, you will end up with, for example, 18 BTUs/cubic foot in this smaller area during daylight hours, and 10 BTUs/cubic foot during the evening when you open up all of the ducts and cool the entire boat).

Exceptions: Catamarans and boats with large "greenhouse" like glass that allows lots of direct sunlight into the boat: Unless you can shade thesewindow ac units portable areas so they are not in the direct sunlight, addcentral air conditioning fan will not turn on about 600 BTUs of a/c capacity for every square footac unit completely frozen of this glass (not the vertical panes as well). Tinting the glass helps a lot, however a simple tarp a few feet above the glass is the best solution while not eliminating your view. fabric the better for dark colors also block most of the UV radiation unlike a white fabric. that tinted glass is not permitted in the navigation station because it almost eliminates your nighttime

In applications where there is an unusually high heat load from many passengers such as a party boat, you should also increase yourThe general rule of thumb is 250 BTU's for inactive occupants and 500 BTU's for active occupants such as working or dancing. Please note that these formulas are for maintaining the desired temperatures of a typical vessel. Don't arrive at your boat at noon after it's been baking in the hot sun for hours with an inside temperature of 120�F, and expect it to be at 72�F inYou usually have thousands of pounds of furniture, fiberglass and steel that needs to be dropped 50� before the a/c has to only maintain this temperature. Just as in a house that has been closed for vacation, it may take several hours for the a/c system to catch up. "Thermal Load" or "Thermal Mass" is most easily overcome during the evening hours when the thermal gain from the sun is nonexistent.

program the system to go on a 3AM, for example, in these situations - especially with commercial boats, unless you want to grossly oversize the system to Using these factors combined with some common sense will almost always produce a satisfactory system, however you can always hire a professional to prepare a thermodynamic heat load analysis for your particular vessel. We have a lot of experience sizing different vessels and will work with you in Equally important to properly sizing the vessel is determining how much individual temperature control is desired. individual staterooms you may wish to have small separate systems that are independently controlled and one large system for the main salon and galley We will take into consideration many factors when recommending a system for your Cruise N Comfort USA 12 Volt Marine Air Conditioner Cruise N Comfort MES 6000 Top Exhaust 12 volt marine air conditioner.