Peltier Type Dehumidifier

This Windchaser Small Dehumidifier (model WHDMW) offers a small portable solution to dehumidification, and because of its small design, this dehumidifier goes almost anywhere. This small dehumidifier dehumidifies 0.8 pints of water out of the air per day.   Source CompactAppliance.com

While most dehumidifiers are large, bulky, and heavy, this mini dehumidifier is small  and only weighs 6 pounds. The mini dehumidifier uses a thermoelectric peltier unit to condense moisture out of the air so there is no heavy compressor to worry about.

Because the reservoir is less than 1 pint (2 days), we drilled a hole in the reservoir to drain water.  We place the dehumidifier on a cutting board straddling the sink, so the water drains to the sink (see picture below).  For extended periods we may open the through-hull a touch to drain the water off the boat.

Peltier devices, also known as thermoelectric (TE) modules, are small
solid-state devices that function as heat pumps. A "typical" unit is a few
millimeters thick by a few millimeters to a few centimeters square. It is
a sandwich formed by two ceramic plates with an array of small Bismuth
Telluride cubes ("couples") in between. When a DC current is applied heat
is moved from one side of the device to the other - where it must be removed with a heatsink. The "cold" side is commonly used to cool an electronic device such as a microprocessor or a photodetector. If the current is reversed the plate generates heat.