I just visited our boat for the first time since September. Everything was in very good shape. However I realized, as I turned on the defroster in the car, that fresh-air exchange and venting are important for getting rid of excess moisture. The same principal should apply to the boat.
There are virtually no vents in the upper parts of our boat. I am considering adding passive vents in the ceiling of the salon where it is under the flybridge chin. The down side of this is that (1) puting more moisture in the flybridge chin space = not SO bad, but (2) the exchange air will be drawn into the engine space first where it is likely to increase condensation - the worst possible place, in my opinion.
I usually leave the down-wind vent slightly open in the forward berth area, where the vent is below deck and facing downward on the curve of the bow flare. But this is relatively low in the structure.
I'm sure someone has thoroughly thought this out and there is probably some practical experience out there. Please do make suggestions.
There are virtually no vents in the upper parts of our boat. I am considering adding passive vents in the ceiling of the salon where it is under the flybridge chin. The down side of this is that (1) puting more moisture in the flybridge chin space = not SO bad, but (2) the exchange air will be drawn into the engine space first where it is likely to increase condensation - the worst possible place, in my opinion.
I usually leave the down-wind vent slightly open in the forward berth area, where the vent is below deck and facing downward on the curve of the bow flare. But this is relatively low in the structure.
I'm sure someone has thoroughly thought this out and there is probably some practical experience out there. Please do make suggestions.