Cowl vents

Discussion in 'Catalina 22' started by Dug22, Mar 6, 2019. Add this thread to a FAQ

  1. Dug22

    Dug22

    Joined Jan 29, 2019
    64 posts, 18 likes
    Catalina 22
    KimberlyJaz US Vincent Alabama, BSC
    Were do I need to install cowl vents? I have also looked at the solar vents but they have mixed reviews. I am looking for ventilation in boat, say when it rains and we are at anchor and I have the hatch boards installed I want air to be able to get in the cabin.
     


    TomY likes this.
  2. markwbird

    markwbird

    Joined Nov 26, 2012
    999 posts, 235 likes
    Hunter 34
    US Berkeley
    With hatch boards and hatches closed you are not going to get good ventilation if you are on board. Body heat and breath are too much for cowl vents to handle. It will be muggy. I open the companionway and forward hatch and put an umbrella over each to keep rain out.
     


    Doug Doty likes this.
  3. Dave Groshong

    Dave Groshong SBO Staff Staff Member

    Joined Jan 25, 2007
    1,414 posts, 122 likes
    Catalina 22
    US Seattle
  4. Gene Neill

    Gene Neill

    Joined Sep 30, 2013
    2,782 posts, 1,374 likes
    C-22, Albin Vega
    US central Florida
    Raise the boom end, and tilt your Bimini forward. Makes a great little "porch". You can leave the crib boards out, for the most part.

    [​IMG]
     


  5. rpludwig

    rpludwig

    Joined May 23, 2016
    710 posts, 368 likes
    Catalina 22 #12502
    US BSC
    Install a couple of these fans, wouldn't be without 'em...they really move some air...
    plus Gene's method and hatch umbrella...

    [​IMG]
     


  6. Milton.Audas

    Milton.Audas

    Joined Aug 31, 2011
    219 posts, 20 likes
    Catalina C-22
    US Lake Rathbun, IA
    We love the solar vents. They can be set to exhaust or pull fresh air in. Get the 4" version to pull more air flow. Mounted one in the for'ard hatch and very pleased with the vent and location. Reasonably quiet. CD stock them but available almost anywhere on the web.
     

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  7. TomY

    TomY Alden Forum Moderator

    Joined Jun 22, 2004
    1,705 posts, 1,632 likes
    Alden 38' Challenger yawl
    US Rockport Harbor
    High on the house works best for cowl vents. To keep out rain and spray they need to be on a dorade box of some kind to keep water out of the cabin. Plus as stated, you have to exhaust air from the cabin, usually achieved through the companionway. You'd have to figure out an exhaust route with rain protection(dodgers achieve this on most larger boats, a small companionway spray dodger on your 22'?). Edit: Genes solution for companionway rain protection is great.

    On a 22' a couple 3" cowl vents on dorade boxes at anchor in the rain, with just a little breeze, could be the difference between a comfortable and unbearable night below.
     


  8. greg_m

    greg_m

    Joined May 23, 2017
    545 posts, 226 likes
    Catalina Jaguar 22
    ZA Simons Town
    My boat does not have the pop top. So along both sides of the sliding hatch, aft end of the coach roof is where my boat has vents fitted. They are kind of passive in that there is no forced draft due to fan. I may remedy this by fitting fans like they have in "electric ducted fan model jet aircraft" in the internal tube part of the vent.

    These pictures are from the early days of my refurb thread!
     

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  9. Jacktar

    Jacktar

    Joined Sep 14, 2014
    784 posts, 351 likes
    Catalina 22
    US Pensacola, Florida
    My c22 has a solar vent in the foredeck hatch and a passive inlet in the front of the crib boards. see pix, vent set on exhaust and runs 24 7, Nico day nite solar . New solar vent.jpg Spacer for sliding hatch.jpg
     


  10. Dave Groshong

    Dave Groshong SBO Staff Staff Member

    Joined Jan 25, 2007
    1,414 posts, 122 likes
    Catalina 22
    US Seattle
  11. greg_m

    greg_m

    Joined May 23, 2017
    545 posts, 226 likes
    Catalina Jaguar 22
    ZA Simons Town
    Odd place to store the "tot" measurer thingy!
     


  12. Jacktar

    Jacktar

    Joined Sep 14, 2014
    784 posts, 351 likes
    Catalina 22
    US Pensacola, Florida
    It is a solar walk light to illuminate the combo lock on the hatch when its dark out. 99 cent cheap fix .
     


  13. Justin_NSA

    Justin_NSA

    Joined Jul 7, 2004
    5,568 posts, 1,171 likes
    Hunter 30T
    US Cheney, KS
    Is it me? Are cowl vents old school? Solar vents may not help much on cloudy, rainy days without battery reserve. There are some wind driven vent that might work. Opening up and fan use work best I think.
     


  14. TomY

    TomY Alden Forum Moderator

    Joined Jun 22, 2004
    1,705 posts, 1,632 likes
    Alden 38' Challenger yawl
    US Rockport Harbor
    Old school I agree, but I don't think a better option to ventilate a small boat at sea (or anchor in the rain), has been invented.

    Cowl vents on dorade boxes are expensive on new boats so unless the boat is/was designed to spend time at sea, I don't see them often.

    I still see cowl vent/dorade boxes on new designs that will spend some time at sea. I count at least 6 on ANNA, a newly launched custom boat. ANNA will spend enough time off shore to need the dry air below for the crew in a wet seaway.

    ANNA cost $7,500,000 to build, shiny cowls fit within the budget. :)

    [​IMG]
     


  15. Gene Neill

    Gene Neill

    Joined Sep 30, 2013
    2,782 posts, 1,374 likes
    C-22, Albin Vega
    US central Florida
    So is the practice of using sails for propulsion. ;)
     


    TomY and Dug22 like this.
  16. Dug22

    Dug22

    Joined Jan 29, 2019
    64 posts, 18 likes
    Catalina 22
    KimberlyJaz US Vincent Alabama, BSC
    I think I will install cowl vent''s on the port side aft cockpit. Our dinnete is always down so it should help with ventalation.
     


    TomY likes this.


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