Everything Boat Building Don't tell me that I can't. Tell me how I can.
I can also be found on Pinterest Instagram Linkedin	Custom Search
Help keep this website free. We gratefully accept donations of $5.00. or less. If you appreciate this website and it has helped you in your boat building business, or as a boat owner, please consider donating to keep this site free. Donations will be used for the maintenance and updating of this site and to pay our Internet Service Provider for the site space and domain. Thank you for your donation.
The entire Electrical Pages, Capacity and Flotation Course, Gasoline Fuel Systems, Engines and Related Systems, and supporting spreadsheets, of this website may be purchased and downloaded. They are in ebook PDF format and the spreadsheets are in excel. Payment is through PAYPAL Go to the store here
Disclaimer: I am not a spokesperson for the US Coast Guard or ABYC. For an official interpretation of regulations or standards you must contact the US Coast Guard or other organization referenced.. More.....

AIR FLOW GRAPH FOR VENTILATION

Of Engine Compartments On Boats

For Full Size Graph Click on The Image

Fr = Rated capacity of the blower only

Fo = Rated output of the system

Due to losses in the system the rated system output is much less than the rated blower output. System losses come from restrictions in the tube, bends in the ducting, and friction due to the use of corrugated ducting, and other parasitic losses. So using the graph, a blower that is rated for 250 CuFt/min may only be putting out 70 CuFt/min at the exhaust outlet when the entire system is installed.

This Web site may contain copyrighted material the use of which has not always been specifically authorized by the copyright owner. I am making such material available in my efforts to advance understanding of educational, economic, and scientific issues, etc. I believe this constitutes a "fair use" of any such copyrighted material as provided for in section 107 of the US Copyright Law. In accordance with Title 17 U.S.C. Section 107, the material on this Web site is distributed without profit to those who have expressed a prior interest in receiving the included information for nonprofit educational purposes. For more information see: www.law.cornell.edu/uscode/17/107.shtml. If you wish to use copyrighted material from this Web site for purposes of your own that go beyond "fair use", you must obtain permission from the copyright owner.