Acoustic Louvres

Series 7000 – Type 7010

The Robertson Acoustic Louvre Type 7010 is a factory assembled, medium performance, halfchevron louvre.

Series 7000 – Type 7020

The Robertson Acoustic Louvre Type 7020 is a factory assembled, medium performance, full chevron louvre.

The following table shows noise reduction levels (in dB) recorded during testing:

NOTE:
Tests were carried out in accordance with ASTM E336-67T, Section A2.3 “Test procedure for measuring transmission loss in non-laboratory type configuration”. Field transmission loss was determined as specified in Section A2.3 E.336, defined as FTL = NR - 6.

* Denotes minimum dimensional limitation.
NOTE:
Standard heights shown give maximum free inlet area; however, louvres can be manufactured to suit any opening dimensions.

Series 7000 – Type 7030

The Robertson Acoustic Louvre Type 7030 is a factory or site assembled, medium to high performance half-chevron louvre.

Series 7000 – Type 7040

The Robertson Acoustic Louvre Type 7040 is a factory or site assembled, high performance half chevron louvre.

The following table shows noise reduction levels (in dB) recorded during testing:

NOTE:
Tests were carried out in accordance with ASTM E336-67T, Section A2.3 “Test procedure for measuring transmission loss in non-laboratory type configuration”. Field transmission loss was determined as specified in Section A2.3 E.336, defined as FTL = NR - 6.

* Denotes minimum dimensional limitation.
NOTE:
Standard heights shown give maximum free inlet area; however, louvres can be manufactured to suit any opening dimensions.