Engineroom vent sizes table

Discussion in 'Boat Design' started by Landlubber, Jul 31, 2007.

  1. Landlubber
    Joined: Jun 2007
    Posts: 2,640
    Likes: 124, Points: 0, Legacy Rep: 1802
    Location: Brisbane

    Landlubber Senior Member

    Hi folks,
    Could someone please supply a table of required engineroom vent sizes for different horsepower ranges. Specifically I require answers in the 200 to 600 hp range and have not been able to find any satisfactory answers yet.
  2. Ike
    Joined: Apr 2006
    Posts: 2,402
    Likes: 281, Points: 83, Legacy Rep: 1669
    Location: Washington

    Ike Senior Member

    This is probably not what you are looking for but here is a graph on my web site based on air flow and compartment volume. What you seem to really want to know is how many cubic feet per minute the engine uses. If you knew that then you coild match that to a blower and vent sizes to handle the amount of air you need. Engine manufacturers probably have the information you are looking for http://newboatbuilders.com/pages/airflow.html

    The ventilation page on my web site is: http://newboatbuilders.com/pages/vent.html
  3. Nojjan
    Joined: Sep 2006
    Posts: 111
    Likes: 4, Points: 18, Legacy Rep: 30
    Location: North Europe

    Nojjan All thumbs...

    You should specify diesel of gas engine. The diesel is running with a large air surplus for best efficiency so it is important. Contact any Volvo Penta facility and ask them to read from the installation manual for a suitable engine. I have seen it for diesels at one point, I think it is about 1.9 x power (kW) in cm2 air duct consumption and then 1.65 x power (kW) for ventilation (both in and out).
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