Ventilators in the Series RIF with
sound absorbing extras are perfect for applications with high noise
The ventilator shaft is lined with non-combustible sound absorbing
slabs that have an abrasion-proof glass fibre surface. The sound
attenuated gravity roof ventilators have been tested by a neutral
institute in the echo chamber and in large-scale tests.
Series RIF-SD gravity roof ventilators can attain a sound insulation
factor R'w of up to 35 dB and they are designed to meet acoustic
specifications on a project-specific basis.