View Full Version : Engine room Exhaust fan

13-05-2016, 08:03 PM
Is there a test I can do to verify the CFM on my engine room fans?

13-05-2016, 08:40 PM
Who makes the fan,maybe they would have the info guess speed size and some others factors may be needed there is the old saying my retired fridge tech used to say it will only blow what it can suck!

The Viking
13-05-2016, 08:54 PM

Using an anemometer you get the velocity of the air in the duct (or, if ductless, you have to make a funnel like hood out of cardboard or MDF to channel the air through) then you just multiply the velocity with the area of the duct (or opening of your funnel) and you have your CFM.
For example, if air is moving at 1 ft/s through a 1 square foot hole then you are moving 60 CFM (1 x 1 x 60=60)