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Post by renegade27 on Jul 4, 2009 13:12:40 GMT
A big negative of the Sun Odyssey 35 (and I suspect other Jeanneau's) is a relative lack of ventilation - especially when the boat is closed up. My boat has a passive vent on the main cabin hatch and some holes in the hatch boards - that it! and that's really not enough  Especially in this wet spring, I'm concerned about mold - a major problem on my last boat and really tough to get rid of once it takes hold. I can do the obvious and add some solar vents, et. Wanted to see if anyone came up with other, more creative or effective ideas! |
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Post by MalcolmP on Jul 4, 2009 20:06:30 GMT
Agree ventilation is limited and guess depending on what climate you have that maybe a greater or lesser problem. Here on the UK east Coast it is often damp  apart from peak summer season, so we have kept a 240v dehumidifier on board in the Marina on our previous boats First 305, JSO 34.2 and current 39i and after several years have never had any mould in any of the boats, but admit have to have 240v supply We also prop up the berth cushions if leaving the boat for more than a few days to ensure condensation does not build up - a problem in the forecabin due to the water tank under berth Malcolm |
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Post by renegade27 on Jul 21, 2009 10:14:59 GMT
I'm adding a solar vent this weekend aft of the front hatch, just behind the babystay.
OK, when I start drilling and sawing into the deck, what will I find? They talk about some sort of infusion deck or something, but no definition of what there is.
Is there a core? Balsa? Other? Do I need to cut the core back away and fill with epoxy to prevent water ingress into the core?
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Post by Don Reaves on Jul 21, 2009 10:37:53 GMT
You might consider putting the vent in the hatch itself.
Don
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Post by MalcolmP on Jul 21, 2009 21:29:12 GMT
I'm adding a solar vent this weekend aft of the front hatch, just behind the babystay. OK, when I start drilling and sawing into the deck, what will I find? They talk about some sort of infusion deck or something, but no definition of what there is. Is there a core? Balsa? Other? Do I need to cut the core back away and fill with epoxy to prevent water ingress into the core? I would agree with Don, why not put it in the hatch itself? Many Jeanneaus have balsa in the deck, don't know for sure on the SO35, as well as waterproofing I would want to ensure you are not too close to the baby stay area as it obviously structural, so avoid introducing a point of weakness Malcolm |
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Post by renegade27 on Jul 21, 2009 22:32:30 GMT
Last boat I put the vent in the hatch and it really blocked the sun and view - maybe a good tradeoff anyway.
I was planning on putting one off center to starboard, and, if needed a matching port side vent as well.
Good point about the babystay and structure, Webcrew.
I just checked the Jeanneau website - it is the "Prisma" process for decks - anyone have an idea what this consists of?
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Post by MalcolmP on Jul 22, 2009 19:30:43 GMT
I just checked the Jeanneau website - it is the "Prisma" process for decks - anyone have an idea what this consists of? That should be good news for cutting holes, most on the newer Jeanneau's use this, basically when the deck is being laid up the glass laminate is laid into the mould dry, (I presume with other reinforcing such as Balsa, but not sure I regret), then a second matching mould is closed over the reinforcement. The resin is then injected and sucked into the depressurized void, filling all the air space and saturating the reinforcement with resin Whilst not totally without voids it makes a very strong layer - you can see this in the cockpit hatches for example on newer models where the inner side is as smooth as the external surface There will of course also be a headliner and gap that you will need to think about when fitting a vent Do let the forum know how you progress, this is pioneering work that you are trailblazing for others to follow ;D ;D Malcolm |
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Post by renegade27 on Jul 25, 2009 18:09:13 GMT
Got the work done and everything looks great! I wanted to have the vent behind aft and to one side of the hatch in case I decide to put in another vent - making sure it fell into the front cabin brought me a little closer to the babystay than I really wanted to .. I couldn't go further port due to the curvature of the deck (had to be less than 1/2" in 12 inches).   . I cut the deck using a jigsaw and followed all the Nicro vent directions. The deck cut very cleanly both inside and out - no real chipping or the like. I was very surprised to see a network of fiberglass resin all throughout the core - must separate regions of foam core (it's not balsa) as well as provide extra stiffness to the deck.   I dug out some of the core and coated it with resin epoxy per the directions.   Total time about 2 hours - but working really slowly and carefully. Maybe an hour was spent just cleaning up the hole with a file - if you've got a big enough hole saw (in this case 4-3/4") you could do it much faster I'm sure. Doesn't look bad! This model provides 1000 cfm. Depending on how well it works I may put another on the starboard side...     |
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Post by MartyB on Jul 26, 2009 0:05:14 GMT
Looks nice.......
Knowing you are not on the left coast here where I am, me having a 4.5, 4.75, 5 and 5.5" hole saws probably do not do you a lot of good now do they!LOLOL
Marty
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Post by renegade27 on Jul 26, 2009 10:02:10 GMT
So now I know where to get a good hole saw for the starboard vent!
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Post by MartyB on Jul 26, 2009 15:01:32 GMT
Come on out! ;D ;D One of the joys of being in construction, seems like I have tools other do not for many reasons shapes and forms! Of course there are tools I DO NOT have too, as I do not need them............ Looks nice. Altho I would have put it in the hatch glass/equal myself. I do not lose that much light from the vent on my rig. But that is getting personal in the matter, and we all have to do what we feel is best for out needs. Marty |
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Post by Don Reaves on Jul 26, 2009 16:22:35 GMT
Hope your vents last longer than mine did. I only got about 3 years on them, after which time the motor wouldn't turn. Maybe there were some instructions for maintenance I overlooked.
Don
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Post by renegade27 on Jul 27, 2009 10:09:43 GMT
There's a rechargable C-size battery that needs replacement every 2-3 years. Did you check this? I thought the vent on my old boat was toast until a friend suggested this. Came back on like magic.
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Post by Don Reaves on Jul 27, 2009 10:18:12 GMT
Yes, I replaced the batteries. But the bearings in the motor had gotten dirty or something. There was a lot of friction that the motor had to overcome. And this was in three separate fan units, not just a single one.
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Post by MartyB on Jul 27, 2009 14:58:58 GMT
Do the solar vents still vent IF the battery or equal is dead?
it may behoove to have a manual vent along with the solar vent. I've not had any issues with my manual vent. Granted I am sure it does not move as much air etc. but having it, the forward hatch and smaller hatch above the saloon area seems to keep the boat aired out pretty good overall. Then being in the NW, is a bit less humid etc than on the east coast too.
Just a bit o thinking and wondering out loud.
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Post by Don Reaves on Jul 28, 2009 10:05:57 GMT
My guess is that the powered vents that I had allowed considerable air to pass even without the motor turning, much like a passive vent. At least, it looked like they would based on the design of the blades.
I wouldn't bother with a passive vent. You can always remove the blades if the motor fails while waiting for a replacement to arrive.
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apart from peak summer season, so we have kept a 240v dehumidifier on board in the Marina on our previous boats First 305, JSO 34.2 and current 39i and after several years have never had any mould in any of the boats, but admit have to have 240v supply
