Acoustic wall  ventilation STM are used in mechanical or natural ventilation systems

• It guarantees a wall attenuation of 40 dB and 45 dB for air-flows of 22 and 30 m³/h which are associated with a the acoustic sleeve MAC30
• Generally associated with self-adjusting air- inlets of 22, 30 and 45 m³/h type M or associated with humidity-controlled air-inlets type ISOLA
• Used for an internal insulation mounting
• Entirely made in polystyrene

• Vertical or horizontal mounting with the both following possibilities:

* inside the lining with an adjusting sleeve
* with removable front face to help the cleaning

• installed on a Ø125 mm hole
• Test reports CETIAT n°20 80148 et 21 14 236/1.