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The vent frame is basically 2.0 meters wide and 1.5 meters high. There are horizontal louvers placed about 11.5 cm apart. The measurements presented below were taken on a 30 cm x 30 cm grid with the anemometer held ~30cm away from the vent.
All measurements are in m/s. Normal component was measured, horizontal flow direction away from vent is positive.
| 0.8 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| -0.5 | 0.0 | 0.7 | 0.5 | 0.5 | 1.3 | 0.9 | 1.9 |
| -0.2 | 0.0 | 0.0 | 0.5 | -0.7 | 0.1 | 0.2 | 2.5 |
| 0.0 | 0.0 | 0.4 | 4.2 | 0.0 | 4.1 | 2.7 | 1.7 |
| 2.8 | 3.3 | 3.0 | 3.1 | 1.8 | 3.9 | 2.0 | 1.2 |
| 1.5 | 2.5 | 5.0 | 0.3 | 5.5 | 3.9 | 0.2 | 4.0 |
There are 6x8 = 42 cells each of size 30cm x 30 cm. That's a total area of 900*42 cm^2 =3.78m^2. Each cell conributes 0.3m x 0.3m = A'= 0.09 m^2 of area and its measured velocity so each cell's flow rate is v*0.09 m^3/s.
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During this time period the anemometer vent airspeed indicated 0.4 (presumably m/s?). During normal operations it's 4 times lower but the other vents are open then as well.
During observations we therefore expect about 1m^3/s of airflow through the fan-driven vent.