Smoke extract wall fan - RWM 57-7180-8W-21

The largest model in the RWM 57 series and the only one with an 8-pole motor (725 RPM) — designed for major tunnels and infrastructure with extremely high airflow requirements. At 20,000 m³/h maximum airflow and 383 kg, this model is chosen when a single fan must cover an exhaust volume that would require 3–4 smaller models from the range. The certificate number is different (0036-CPR-RG01-14) from the rest of the series — the certification datasheet specific to this model must be requested separately.

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.