100-600-50 round silencer NRF (50 mm insulation), ETS NORD

The ETS NORD NRF 100-600-50 round silencer is designed for 100 mm ventilation ducts, offering exceptional noise reduction with minimal impact on airflow. Featuring 50 mm mineral wool sound absorption, a perforated inner tube, and galvanised steel outer shell, it ensures durability and high performance. A fabric lining between the tube and insulation prevents particle migration into the duct system.
This 100 mm duct silencer meets airtightness class D and, with its factory-fitted rubber gasket, guarantees secure, leak-free connections to reduce pressure loss. Ideal for residential, office, and commercial HVAC systems, it effectively attenuates fan noise, regeneration sounds, and terminal unit noise.
Compact and easy to install without sealants or adhesives, the NRF 100-600-50 mineral wool duct silencer is perfect for both new installations and retrofits. For enhanced performance, multiple units can be installed in series.

Technical information:
Connection diameter (d) Ø (mm): 100
Diameter “d1” (mm): 200
Length “L” (mm): 600
Insulation thickness (mm): 50
Weight (kg): 4.1
Fire resistance class: EI15, EI60
Material: Galvanised steel sheet, mineral wool

For greater noise reduction, multiple silencers can be installed in series.
The most effective noise reduction is achieved when the silencer is installed directly behind the fan or a duct elbow.

Key features and benefits
– Maximum noise attenuation – the 600 mm length and 50 mm mineral wool insulation provide superior sound suppression across a wide frequency range.
– Durable construction – NRF 100-600-50 perforated inner tube and robust galvanized steel casing resist corrosion and wear in long-term operation.
– Airtight sealing – factory-fitted rubber gasket ensures a secure, leak-free connection, reducing air leakage and pressure drop.
– Low airflow resistance – maintains optimal ventilation system performance while effectively dampening fan noise, regeneration sounds, and terminal unit noise.
– Quick installation – simple to mount without adhesives or solvents, making it ideal for new installations or retrofits.
– Versatile applications – NRF 100-600-50 ir suitable for commercial buildings, industrial facilities, offices, and large residential HVAC systems.