Throwing this out for discussion . . . what about digital manometers with RS-232 interface or USB connection? I see them on ebay all the time for less than $200.
Would you not be able to read the data into Excel?
Use a digital manometer w/output for differential pressure and a water gage for your static.
Edit: After posting this message I contacted Extech a supplier of this product and asked about the software capabilities for data output from an HD700 manometer which is a 2psi meter. I'll keep everyone updated on what I findout.
Edited By bruce on 1210549333