Standard: A standard hole in perforated panel enables smooth air flow through the flooring.
Chamfered: The smooth air flow through a chamfered hole is increased in comparison to a standard hole.
This is assisted through a reduction of turbulence at the floor surface.

Differential Pressure vs. Flow Rate:

TEST

STATIC PRESSURE

CHAMFERED

AIRFLOW

NON-CHAMFERED

AIRFLOW

INCHES OF WATER
Pascals
SCFM

M^3/hr

SCFM

M^3/hr

0.0025
0.62
204
347
192
325
0.05
1.25
291
494
272
461
0.01
2.49
371
630
378
642
0.02
4.98
526
894
491
834
0.03
7.47
623
1059
578
982
0.04
9.98
721
1225
664
1127
0.05
12.46
784
1332
730
1240
0.06
14.95
858
1458
815
1384
0.07
17.44
941
1598
860
1460
0.08
19.93
980
1665
900
1528
0.09
22.42
1043
1772
935
1589
0.10
24.91
1105
1877
1027
1744