The silent VK 250 U, 1080m3 / h duct fan is made of durable and lightweight ABS plastic. Piping fan is suitable for air extraction from medium-sized office, commercial, residential and industrial premises. The built-in thermostat will simplify the ventilation of your rooms. Set the required temperature manually directly on the fan. If the temperature rises by 2 degrees, the engine will start to work faster. When the room cools down, it switches to a lower speed.