We leave our boats in Fl, during the summer and need ventilation to keep the boat from growing green inside.
This requires MASSIVE ventilation that is hurricane proof.
We have tried many systems including buttoning up and leaving wine bottles of mustard gas and a slow release system.
Nothing works as well as a big turbine vent.
A standard 14x14 RV or marine hatch is installed ,the opening lid is removed , and a ply cover is bolted thru the opening.
This is removable ,and the hatch cover replaced so the boat looks "normal" during its operating season.
Tho with our commercial non yachtey style boat , we have cruised with it in place .
You musty purchase the style used in shore communities , aluminum not galvanized as the ss bearings are better sealed.
Turbine Roof Vents - Heavy Duty -No Squeaking- All Sizes
Efficient Wind Powered Ventilation
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