CD12P

Desiccant dehumidifiers use an absorbent material, usually Zeolite, that soaks up water vapour from the air, just like silica gel. The desiccant material is located in the wheel, that slowly rotates. The fan draws the air through that wheel, and the air dries. Moisture is extracted from the desiccant by heating a portion of the wheel not being used to dry the air. This transforms the water back into vapour, which is then passed over a cold plate to cool the mixture and cause the water to condense.
Desiccant dehumidifiers will work best in temperatures from 1℃ up to 40℃. They are also very practical and efficient with a very high capacity for water extraction.

Compressor dehumidifiers work best at higher temperatures, starting from 15℃. Note that tests are made in the temperature of about 30℃ and humidity level of 80%.
The performance of such dehumidifier tends to depend on environmental conditions, which is referred to as sensible capacity. Note that in the real working environment, the sensible performance of a compressor dehumidifier will be lower, that in the test environment.

The compressor dehumidifier works best at 15℃ or higher. The desiccant dehumidifier, on the other hand, can work at temperatures as low as 1℃. In case you plan to leave the boat dehumidifier without supervision for an extended period during winter, the desiccant dehumidifier is ideal for you. Ensure the dehumidifier has the automatic restart feature, in case the electricity is unstable.

The crucial features are the humidistat, automatic reset and a cut off switch. The automatic reset will turn the dehumidifier on when the power source comes back. The humidistat will make sure that your dehumidifier is working on an optimal level, and will turn off as soon as the humidity reaches the pre-set level. The cut-off switch will stop the operation of the dehumidifier, as soon as the water tank is full. There is also a light indicator of such an event that will turn on.