I have one of those nicro day/night vents for my composting head
. It runs in the rain just fine. It has a lip that's about 3/4" above the deck
, so it will keep typical rain out that's running down the deck
. There's a greenwater shut off as well, but I've never used it although I've had a couple of smashed waves. Not pure blocks of water
, but enough to flood the side decks. No drops got in below.
It doesn't vent that much though. My dorade vent allows a lot more air through, although no when the wind
stops and/or not when underway.
The day/night solar
vents are good for ventilation in general (and keeping compartment moisture down by venting out), but aren't going to make a hot boat cool.