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For more accurate NRC Rating; panel thickness and cavity size needs to be determined.

STRAIGHT

ZHN3125
3% Uncovered
NRC Rating: 0.45 - 0.50

3mm hole dia
12.5mm centers on straight rows

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ZHN6125
11% Uncovered
NRC Rating: 0.70 - 0.80

6mm hole dia
12.5mm centers on straight rows

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ZHN8125
20% Uncovered
NRC Rating: 0.90 - 0.95

8mm hole dia
12.5mm centers on straight rows

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STAGGERED

ZHS320
3% Uncovered
​NRC: 0.45 - 0.50

3mm hole dia
20mm centers on staggered rows​

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ZHS620
14% Uncovered
​NRC: 0.70 - 0.80

6mm hole dia
20mm centers on staggered rows

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ZHS820
24% Uncovered
​NRC: 0.90 - 0.95

8mm hole dia
20mm centers on staggered rows

Slot Perforations>