Smoke Extract Roof Fan - RWM 57-2528-4W-10

The most compact model in the RWM 57 range with a 4-pole motor — designed for small exhaust cross-sections and low airflow requirements (up to 1,800 m³/h).

With a sound power level of only 73 dB(A), it is the quietest model in the entire RWM range, suitable for applications in buildings with strict acoustic limits.

Identical dimensions to the RWM 57-2528-2W-11 (same Ø286mm casing, 40 kg) allow direct replacement between the 2-pole and 4-pole versions in the same mounting opening.

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.