Our exhaust fans consist of the following components: exhaust fan, solid check valve. Suitable for: bathroom, toilet, basement, recreation room, living room, kitchen, living room, hallway... This indoor fan ensures optimal air exchange and guarantees use fast and efficient, avoids all odors and allows filtration through the ventilation holes. Very easy to install: walls, windows, panels and ceilings... Non-return valve: prevents outside air from entering and heating leaks when the air extractor is not working . It also prevents any air circulation when the vacuum cleaner is stopped. Opened under air pressure. Technical characteristics: diameter: 150mm; power : 180 m3/h; sound level : 37 dB (at a distance of 3 meters under laboratory conditions). Fluent : 220-230 V, 50-60 Hz - Power: 17 W - Protection class: IP-X2 Product body and organs: Using ABS plastic, the product quality is better and the service life is longer. Long life motor with copper motor and ball bearing.