Most boat owners have had to deal with condensation and the subsequent mold and mildew that can quickly grow in damp conditions. Put your cover on your boat when the carpet is damp and you’ll trap in moisture. When the air under the cover cools at night, the moisture precipitates out and makes the perfect habitat for molds.
The first line of defense is to have a good boat cover made of a breathable, marine grade polyester or acrylic. Breathable fabrics will allow water vapor to escape through the cover. Some covers come with built in venting, or aftermarket vented support poles can be added. These provide an additional way for warm moist air to escape from under the cover.
The second line of defense is to install a boat air dryer or dehumidifier. These products are designed to reduce humidity in an enclosed area and work on a couple of different principles.
Chemical Boat Dehumidifiers
Chemical dehumidifiers come in a couple different forms, including disposable tub and packets, and reusable silica gel cartridges. Chemical air dryers are popular because:- They don’t require electrical power to operate
- They are not particularly temperature sensitive
- They are fairly inexpensive.
- The need to monitor and replace or recharge regularly
- Each unit generally handles a smaller space
Electric Boat Air Dryers
- Where temperatures are between 33 and around 55 degrees Fahrenheit
- Electric power is available
- It is inconvenient to access the air dryer on a regular basis





