AC version: Axial wall fan with steel wall ring, in AC version. Brief description: For surface mounting. Protective grille on the suction side, contact protection in accordance with DIN EN ISO 13857. 8-blade impellers made of glass fiber reinforced polyamide. Thermal overload protection as standard. Fans meet the requirements of the European Ecodesign Regulation (EC) No. 327/2011 Directive 2009/125/EC. Vibration-free operation thanks to dynamically balanced impeller and motor (shaft-rotor), in accordance with quality level 6.3, DIN ISO 1940, Part 1. High efficiency on the ventilation side, low operating noise. Increased durability thanks to high-quality materials such as low-noise ball bearings. Fans are maintenance-free. Can be installed in any position for ventilation and exhaust ventilation. Air flow direction: The air flow direction is marked. Standard exhaust air operation, air flow direction suction via motor. AC motor: EZQ/EZS series. Asynchronous motor. Not suitable for conveying air saturated with water vapor. Rated voltage 230 V, 50 Hz. Fans ... B: Capacitor motors with operating capacitor on the protective grille or on the wall sleeve, protection class IP 55. Fans ... D: Capacitor motors with operating capacitor in the terminal box, protection class IP 54. Fans ... E: Shaded pole motors, protection class IP 54. Speed controllable. Exception for type EZQ 45/6 B. Devices can be continuously controlled with an optional speed controller or they can be switched in stages with an optional 5-stage transformer. Reversible. Exception for fans with shaded pole motor (... E). Reversing operation: The volume flow is reduced by approx. 35% if the conveying direction is abnormal. Thermal overload protection as standard. Electrical connection: On terminal block in the end cover of the motor. Safety instructions: The fan may only be operated if the impeller is protected against contact in accordance with DIN EN ISO 13857, e.g. with Maico protective grille SG. Article: EZS 30/4 B, design: steel wall ring, flow rate: 1850 m3/h, speed: 1425 1/min, impeller type: axial, speed controllable: yes, reversibility: yes, voltage type: alternating current, rated voltage: 230 V, mains frequency: 50 Hz, rated power: 90 W, INom: 0.4 A, IMax: 0.55 A, protection class: IP 55, thermal class: B, pole-changing: no, installation location: wall / ceiling, installation type: surface-mounted, installation position: horizontal / vertical, material: sheet steel, galvanized, color: silver, weight: 5.92 kg, weight with packaging: 7.59 kg, nominal width: 300 mm, width: 465 mm, height: 465 mm, depth: 250 mm, width with packaging: 480 mm, height with packaging: 480 mm, depth with packaging: 320 mm, conveying medium temperature at rated current: -20 °C to 60 °C, conveying medium temperature at IMax: -20 °C to 60 °C, closing flap: without