315-900-50 round silencer NRF (50mm insulation), ETS NORD

The ETS NORD NRF 315-900-50 is a compact, high-efficiency round silencer for 315 mm ventilation ducts. Built with 50 mm mineral wool insulation, a perforated galvanised steel inner tube, and a protective fabric liner, it offers long-lasting performance and superior sound attenuation.
ETS NORD NRF 315-900-50 is complying with airtightness class D, this mineral wool silencer is fitted with a factory-installed rubber gasket to prevent air leakage and reduce pressure loss, enhancing overall system performance. It’s ideal for residential, office, and commercial HVAC installations where noise control is essential.
The 900 mm length provides excellent attenuation while maintaining low airflow resistance. For even greater noise reduction, multiple silencers can be installed in sequence. Installation is quick and straightforward, with no sealants or adhesives required. The most effective noise reduction is achieved when the silencer is installed directly behind the fan or a duct elbow.

Technical Information:
Connection diameter (d) Ø (mm): 315
Diameter “d1” (mm): 415
Length “L” (mm): 900
Insulation thickness (mm): 50
Weight (kg): 16.3
Fire resistance class: EI15, E60
Material: Galvanised steel sheet, mineral wool