Types of Dehumidifier
Passive (not powered by electricity), compressor and desiccant. Passive dehumidifiers are essentially crystals that absorb moisture. We often see these in miniature form in small packets supplied in the packaging of goods. These can be excellent at helping to reduce moisture in small areas such as cupboards and lockers, but aren’t really suitable for an entire boat.
Electric dehumidifiers fall in to two categories: compressor and desiccant. Both types work very well, but compressor types can struggle in the lower temperatures often associated with winter. Desiccant use slightly more power, but work very well in lower temperatures. They normally heat the air slightly too, helping to prevent condensation further.
Which type is right for you? If you heat the boat separately, or for warmer environments such as domestic use, then a compressor type will work well. If you do not heat the boat then our recommendation would be to use a desiccant type of dehumidifier as this will work effectively in lower temperatures.