Input on vent requested

[Dr. D]

My boat has only one vent on the forward hatch, a passive vent. I'm going to replace it with a solar/battery vent. The other venting locations I want to use are two fixed ports, one in the shower stall to starboard and the other in the aft cabin to port; below are pictures of these. What would be a good vent for these fixed ports? As you can see, the ports are small. Also, they do provide light, so I need a clear vent. Thanks!

 

[Hollyberry]

Do these portlights act as backrests when you're seated in the cockpit? Any vent mounted in those would mess that up. I think you'd be better off to put vents in the overhead if there's space.

 

[Will Gilmore]

Before you take the step of installing an outside vent, try a month of living with a circulating fan. Just buy a small cheap plug-in fan and mount it inside the cabin to keep the air moving. You may find you don't need to punch a hole through your boat to reduce mold or moisture condensation.

-Will

 

[Dr. D]

Do these portlights act as backrests when you're seated in the cockpit? Any vent mounted in those would mess that up. I think you'd be better off to put vents in the overhead if there's space.

What you see through the ports are line bags. People tend to rest against those, so a vent shouldn't get in the way. The issue with going through the overhead is the boat has a liner; I'm not sure how well the usual vent base would fit.