calculating cfm

[2-4chance]

how can I calculate the cfm per ton of a system using your temp.drop and static pressure can't remember formula and how can you figure static pressure with digital monometer thanks for the help

[core]

Buy a static pres. tip for you manometer, drill hole, stick tube in and read pressure.

Don't have a tip. ...use a small piece od 1/4 inch copper tube and just insert the tube about 1 inch into the duct.

As for airflow what do you really want to know? Actual CFM at discharge or actual BTU's of your evap. coil?

Core

[core]

Velocity = 4005 * (square root) of Velocity pressure

CFM = area * Velocity

Core

[2-4chance]

cfm discharge

[davidr]

Do you have the fan performance data for the piece of equipment you are working on?