Page 16 of the UK building regulations document F1 recommends that measures be taken to reduce noise disturbance in ventilation systems, Including the installation of sound attenuating products where appropriate. Noisy fans can result in the occupant turning off the ventilation system and compromising the air quality.
Outer duct and perforated inner duct are made from durable galvanised steel.
Mineral rock wool acts as an efficient sound absorbing material.
Protective cloth preventing the release of mineral fibres into the air flow.
Lip seal connectors to maintain airtightness.
Duct Connection: Ø125 mm Length: 900 mm Outer Diameter:Ø255 mm dB-/-250: 21 Hz