Installation in rectangular ventilation ducts. Galvanized housing. Low energy consumption thanks to EC technology. Small space requirement thanks to compact dimensions. Flange profiles on the suction and pressure side. Radial impellers with backward-curved blades made of galvanized steel (DN 22-DN 23) or UV-stabilized and glass fiber reinforced polypropylene (PP) (DN 50-DN 56). Impeller sits on the motor shaft and is driven directly. Statically and dynamically balanced in accordance with DIN ISO 21940-11, balance quality G6.3. Motor impeller can be swung out for cleaning purposes. High protection class IP 54. Use elastic ELP connecting pieces to avoid vibrations being transmitted to the duct system. Direction of flow: The direction of flow and direction of rotation are marked by arrows on the fan housing. The direction of rotation is clockwise when viewed from the suction side. Motor: Motor designed for continuous operation. Robust EC motor with ball bearing, maintenance-free. Thermal motor protection as standard. Integrated motor protection via alarm relay. Speed can be continuously specified in control mode via a 0 - 10 V signal or a potentiometer. Status display via LED (DN 50-DN 56). ModBus RTU interface. Integrated 24 V power source for optional accessories. Installation instructions: Can be installed horizontally or vertically. Electrical connection: Depending on the version, this is made on the terminal box or on the cable. Mains frequency 50 Hz. Article: DPK 31 EC, delivery volume: 3500 m3/h, delivery volume nominal: 2100 m3/h / in opt. efficiency, pressure pfs, nominal: 328 Pa - in opt. efficiency, speed nnominal: 1500 1/min - in opt. Efficiency, speed: 1500 1/min, speed controllable: yes, rated voltage: 230 V, mains frequency: 50 Hz, rated power: 349 W, INom: 1.6 A, protection class: IP 54, thermal class: F, installation location: duct, installation position: any, housing material: galvanized sheet steel, weight: 31.84 kg, weight with packaging: 34.52 kg, fan can be swiveled out: yes, duct dimensions: 600 mm x 350 mm, width: 640 mm, height: 390 mm, depth: 700 mm, width with packaging: 665 mm, height with packaging: 470 mm, depth with packaging: 725 mm, conveying medium temperature: -20 °C to 50 °C