Smoke extract wall fan - RWM 57-3540-6W-10

The 6-pole motor version (925 RPM) on the Ø395mm casing — the same housing as the RWM 57-3540-4W-10, but with lower speed, reduced power consumption (0.37 kW vs 0.55 kW) and a sound power level 10 dB(A) lower (74 vs 84 dB(A)). The correct choice when regulations or the client impose acoustic limits and an airflow of 3,500 m³/h is sufficient for the designed smoke extraction system.

The Nicotra Gebhardt RWM 57 series comprises wall-mounted fans for smoke extraction in the event of fire, certified for operation at 600°C for 120 minutes — the highest fire resistance class in standard DIN EN 12101-3. This certification exceeds the standard F400 class and is mandatory in road tunnels, railway tunnels and buildings with extreme fire risk.

The essential construction feature: the motor is positioned completely outside the hot gas zone and cooled by outside air — the only solution that allows operation at 600°C without motor damage.

Construction: robust galvanised steel casing · galvanised steel intake cone with DIN 24155-2 flange connection · backward curved welded coated steel impeller · all mechanically stressed parts in galvanised or painted steel · IE2 motor completely outside the gas flow · loose feed cable to motor connection box.

All models are certified to DIN EN 12101-3, with horizontal discharge, RD rotation, standard handing 90.