If the boat is in the water:
The smallest one I could find that will sit on my galley counter and allow me to connect a short length of garden hose that can be used to discharge into the galley sink. This way, it never fills the pan and shuts off and can run continuously.
If the boat is out of the water:
The largest tubs of Damprid I can find. We place on in the head, and two in each stateroom, and two in the salon.
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