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16-03-2011, 09:43
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#1
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Registered User
Join Date: Jul 2007
Location: W Florida
Boat: Still have the 33yo Jon boat. But now a CATAMARAN. Nice little 18' Bay Cat.
Posts: 7,086
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Dorade Vents
What I don't really understand is the lack of Dorade vents on modern boats. In my early days of sailing in the 80s all the boats seemed to have them. While still uncomfortable inside at least there was some air moving.
I would think that in the tropics where most cats sail they would be a great benefit.
Why do we not see this type of ventilation in modern times?
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16-03-2011, 09:47
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#2
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Registered User
Join Date: Sep 2009
Location: Houston
Boat: ‘01 Catana 401
Posts: 9,626
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Re: Dorade vents
only reason I can come up with is the extra manufacturing time needed, or modern lack of understanding of what they're for.
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16-03-2011, 10:05
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#3
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cat herder, extreme blacksheep
Join Date: Jul 2008
Location: furycame alley , tropics, mexico for now
Boat: 1976 FORMOSA yankee clipper 41
Posts: 18,967
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Re: Dorade vents
they look funny on modern boats, as the dorade box is spozedly made of teak and stands up and is in the way.
i donot know what it is in the new designs that leaves ventilation without -being addressed as many ports donot open in modern boats.
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16-03-2011, 11:11
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#4
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Registered User
Join Date: May 2008
Location: Nova Scotia until Spring 2021
Boat: Custom 41' Steel Pilothouse Cutter
Posts: 4,976
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Re: Dorade Vents
It's a huge issue, particularly when at anchor.
I am installing dorades at some point before leaving. I am convinced that proper ventilation (obviously with a fully gasketed vent hole and the proper design that allows water taken in to drain) is not only the key to keeping a boat cool, but to keeping it warm and dry, as opposed to not so warm, but damp.
Plenty of discussion in this thread, with pictures: Ventilation and the bulletproof dorade - SailNet Community
A recent woodworker's take: Dorade Box Design & Build | Lord Nibbo’s Blog
Please note they certainly don't have to be wood.
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16-03-2011, 12:05
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#5
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Registered User
Join Date: Oct 2005
Posts: 6,185
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Re: Dorade Vents
Those little solar nicro vents work pretty good too. On the down side they shut off after a few days of full clouds, but on the plus side you don't have to reposition cowls based on how you're lying to the wind.
The next vent I want to put in is an exhaust from the vberth, right smack dab in the overhead / foredeck. My staysail boom would never clear a dorade and I wouldn't want that much clutter up there.
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16-03-2011, 14:20
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#6
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Registered User
Join Date: Nov 2007
Location: Cruising in the SUN! Now hauled out in Malta for the winter.
Boat: 37' Oldenziel cat
Posts: 461
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Re: Dorade Vents
I have fitted four Air-Only Dorade ventilators to blow air into the hulls of my cat. In the aft cabins I have fitted two solar powered ventilators with batteries to extract the air.
I will be fitting two Plastimo Streamlined Dorade ventilators to extract air from my two forward cabins (including the heads) where I already have two venturi-type vents to produce incoming air.
Both the Air-Only and especially the Plastimo Streamlined dorade ventilators are modern looking, without square wood boxes.
__________________
Roger
Catamaran "Burnout"
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16-03-2011, 16:17
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#7
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Registered User
Join Date: Mar 2006
Location: Whangaparaoa,NZ
Boat: 63 ft John Spencer Schooner
Posts: 956
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Re: Dorade Vents
Couldn't imagine a long passage without them.
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16-03-2011, 17:29
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#8
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Registered User
Join Date: Aug 2010
Location: NSW Australia
Boat: Traditional 30
Posts: 1,980
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Re: Dorade Vents
Boats these days are somewhat airier by means of several things. Larger Volume. Larger and more hatches- even over the loo. Solar vents, wind scoops etc.
I think designers have probably removed them for other reasons though. Less physical clutter on the deck being a primary one. (most modern cruisers are made with minimal clutter- some even have halyards etc running back to the cockpit through covered panels). All of this equates to less visual clutter meaning a greater area for the bikini girls to sip champagne.
__________________
Cheers
Oz
...............
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16-03-2011, 18:36
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#9
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Registered User
Join Date: May 2008
Location: Nova Scotia until Spring 2021
Boat: Custom 41' Steel Pilothouse Cutter
Posts: 4,976
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Re: Dorade Vents
Bikini girls? We strip off the moment the land becomes a greyish smudge, sir!
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16-03-2011, 19:35
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#10
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Registered User
Join Date: Mar 2006
Location: Whangaparaoa,NZ
Boat: 63 ft John Spencer Schooner
Posts: 956
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Re: Dorade Vents
Quote:
Originally Posted by ozskipper
Boats these days are somewhat airier by means of several things. Larger Volume. Larger and more hatches- even over the loo. Solar vents, wind scoops etc.
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None of which will stop you getting seasick underway when there is a lot of water coming over the deck.
I'm of the opinion they do it coz they can sell more boats at boat shows without them.
Honestly anything more than a daysailor should have dorade vents.
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16-03-2011, 19:37
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#11
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Registered User
Join Date: Aug 2010
Location: NSW Australia
Boat: Traditional 30
Posts: 1,980
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Re: Dorade Vents
Quote:
Originally Posted by dana-tenacity
None of which will stop you getting seasick underway when there is a lot of water coming over the deck.
I'm of the opinion they do it coz they can sell more boats at boat shows without them.
Honestly anything more than a daysailor should have dorade vents.
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Neither will a Dorade. Or 50 dorades.
Agreed, its cos the boats look prettier without them
__________________
Cheers
Oz
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16-03-2011, 21:44
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#12
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Registered User
Join Date: May 2009
Location: Punta De Mita
Boat: Vagabond 39 Hull # 1
Posts: 1,842
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Re: Dorade Vents
My boat has 5 and 100% leak. Yet another 5 projects.
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16-03-2011, 21:45
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#13
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Registered User
Join Date: Nov 2008
Location: Largo, Florida
Boat: Bruce Roberts Offshore 38
Posts: 268
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Re: Dorade Vents
The same reason that you see most cars driving by with the windows up....
Air Conditioning
__________________
Some people are like a slinky...
Not really good for anything, but fun to push down the stairs.
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04-05-2011, 09:58
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#14
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Registered User
Join Date: Mar 2010
Location: Lyttelton, New Zealand
Boat: Beneteau 40CC Oceanus 1998
Posts: 123
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Re: Dorade Vents
Okay...kick starting this thread again because we just got sloshed on the head a number of times with nice cold water thru the dorades.
Our forward ones do not swivel (aft ones do) and they are big so let more of that green water in. I am considering making sunbrella covers before leaving the next port. Anyone had any luck with this idea helping to stop some green water ingress?
Another thought is to unscrew the little blighters turn them facing aft for the passage and screw em back later...thoughts???
Thanks Clare
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04-05-2011, 10:20
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#15
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Registered User
Join Date: Feb 2011
Location: Adirondacks
Boat: 1967 Alberg 35
Posts: 589
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Re: Dorade Vents
I have whittled some big wooden plugs for them that I put in if expecting a lot of spray over the decks. If blue water ever gets that high I'll be thinking more of survival than anything else! Most of the modern ones come with plugs but it doesn't seem the older ones ever had them. They are also a great way for critters to get in, so, have made screens for them as well. They DO vent better than the other useless mushroom gizmos on the cabin top.
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