Smoke Extract Roof Fan - RDM 57-4550-4W-16

 ensuring a turbulence free discharge and suitable for smoke extraction in the case of fire up to +600 °C -120 minutes. Tested to DIN EN 12101-3, snow load class requirements SL 1000 assigned and CE- certified (Certificate of EG conformity 0036-CPR-RG01-16). Assigned for mounting over heated and unheated rooms. Stylish sealed casing manufactured from aluminium. Base frame of galvanised sheet steel for fitting to upstand, projecting well beyond the upstand in order to increase weatherproofing. Discharge equipped with automatic backdraught shutters protecting the unit inside against weather at standstill. Centrifugal impeller with backward curved blades of steel, welded and coated. All parts submitted to mechanical stresses are made of galvanised steel sheet. The motor is located in a thermally insulated compartment and fully out of the main air stream, additionally cooled by a separate flow. Feed cable passing housing at the front side protected by metal tube The fitting plate for installation of the service switch or connection box is part of delivery (but loose) Performance data in according DIN 24166  tolerance class 2 (BS 848 Class "B").