Properly sizing your boat is a critical part of planning
Properly sizing your boat is a critical part of planning a successful air conditioning system that you will enjoy for many years.
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 in a half hour! You 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. This “Thermal Load” or “Thermal Mass” is most easily overcome during the evening hours when the thermal gain from the sun is nonexistent. We suggest you 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 accomplish your needs.
We have a lot of experience sizing different vessels and will work with you in making this determination. Equally important to sizing the vessel is determining how much individual temperature control is desired. In individual staterooms you may wish to have small separate systems that are independently controlled and one large system for the main salon and galley areas. We will take into consideration many factors when recommending a system for your vessel.