e-Flow 1.4 is free to download from our software library. E-Flow lies within Office Tools, more precisely Calculators. This free tool was originally developed by airflow.
From the developer:
e-Flow is a program that calculates geometry and acoustic absorption of air supply grilles for concert halls, stores, restaurants, hotel rooms, classrooms, hospital rooms, and offices. Using an advanced algorithm, it calculates the exact acoustic pressure and residual velocity for any kind of enclosed space.
You may want to check out more software, such as Metalogic Calculator, Dovada Calculator or OC Conversion Pro, which might be similar to e-Flow.