An Aussie Sailor
Join Date: Nov 2008
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Sometimes in the good weather when I am just working on my boat in it's pen I bring down a mains powered portable fan and sit it in the open front hatch.
It draws air in from outside and forces it through the entire boat.
Freshen things up and achieves more air turnover in 30 mins then I'd probably get from half a days sailing with the hatch open.