Acoustic louvres AVL

The outer casing is made of zinc-coated or powder-coated metal sheet in the RAL range of colours. Minimum metal sheet thickness is 1mm to ensure its robustness and maximum service life of the louvres. Upon request, stainless steel, aluminium, brass and other materials are available. The louvre inll is made of sound absorbing material which is covered with a perforated metal plate. The louvre structure and composition ensure maximum noise attenuation.  
 

The louvres are supplied in three dierent depths (300, 400 and 600mm) ,for simpler choice according to desired attenuation and mounting dimensions. Upon request, louvres of depths up to 200mm are available as well. For safety reasons, the air inlets are equipped with bird protection grids. The louvres are designed to be suitable for mounting both into a wall frame and directly into an air duct. 

 
 

AVL 300 

acoustic louvres with noise attenuation depth 300 mm

 

 

Technical data:

 

Louvre AVL 300

Frequency (Hz)

63

125

250

500

1000

2000

4000

8000

Total (dB)

Insertion loss D (dB)

 2,6

 9,4

 11

 13,3

 13,9

 11,6

 13,4

 14,6

 

Standardized level difference Dne (dB)

 -

 24

 22

 24,9

 26,7

 25,3

 25,2

 -

 

 Sound Insulation R (dB)

 -

 9,8

 7,8

 10,7

 12,5

 11,1

 11

 -

 

 Dnew

 -

 -

 -

 -

 -

 -

 26

 Rw

 -

 -

 -

 -

 -

 -

 -

 -

 12

 

AVL 400 

acoustic louvres with noise attenuation depth  400 mm  

 

 

Technical data:

 

Louvres AVL 400

Frequency (Hz)

 63

125 

250 

 500

 1000

 2000

4000 

8000 

Total 
 (dB)

Insertion loss D (dB)

 1,6  6,1  9,2  14,4  16,2  13  15,2  18,8  

Standardized level difference Dne (dB) 

 -  23  22  25  27  24,2  26,7  -  

Sound insulation R (dB)

 -  8,5  7,7  10,3  12,7  10  12,5  -  

 Dnew

 -  -  -  -

 26

 Rw

 -  -  -  -  -  -  -  -

 11

 

AVL 600

acoustic louvres with noise attenuation depth  600 mm

 Technical data:

 

Louvre AVL 600

 Frequency
 (Hz)

 63

 125

 250

 500

 1000

2000 

4000 

8000 

 Total
 (dB)

 Insertion loss 
 D (dB)

4,16 

 11,04

 14,6

 21,28

 22,24

 18,56

 21,44

 23,36

 

 Standardized level difference 
 Dne (dB)

 -

 26

 24

 27,2

 28,7

 27,3

 27,2

 -

 

 Sound insulation
 R (dB)

 -

 11,8

 9,8

 12,7

 14,5

 12,1

 12

 -

 

 Dnew

 -

 -

 -

 -

 -

 -

 -

 -

 28

 Rw

 -

-

 -

 -

 14

 

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Certification and tests

certifikace

Attested
ČSN EN ISO
11691

certifikace

Attested
ČSN EN ISO
11691

certifikace

Attested
ČSN EN ISO
10140-1,2,4

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