"CFM" calculation question

[johnn]

Is it possible to compute approximate CFM output by measuring the size of the fans on a double squirrel cage and the motor size and rpm`````````s???

supply houses are closed now,,and there seems not much new going on,,,anybody??

 

[TMonter]

Not really unless you know the wheel characteristics of the fan. Do you have a fan model number?

 

[johnn]

I may be able to have son pull fan ass. off insert downstairs,( same manufacturer). The rating tag on motor on the unit upstairs is hard to read, however I believe it only contains motor info.My leg is kinda BROKE, so I will have to rely on my son to do the leg work for me. I`ll post later with info.. Thanks