Originally Posted by capttb
I use one of the round dehumidifiers, probably available almost any boat supply place even a fishing boat place. You'll find black mold will want to grow around hatches and hidden spots that might sweat or get some moisture. A scrub down with a strong bleach solution helps get rid of bad spots.
WEST MARINE Air Dryer Dehumidifier at West Marine
As Faster mentioned, the WM Air Dryer simply provides a tiny bit of warmth, and moves the air around slightly. It does help with condensation, but doesn't remove water from the air. I actually have two of the on my boat, one in the forward V-birth and one in the aft cabin or aft shower (shower if we have been using the shower while out on the boat, aft cabin if not). However, in the main salon I have the dehumidifier to actually dry the air. It is a very good combination for those with shore power.