Ultra Silent duct fans

– Material： Plastic / Metal – Customizable features include time delay, temperature sensors, humidity sensors, and other tailored functionalities. – Integrated backdraft damper to prevent the return of air and entry of insects. – Ensures stable performance with slow start-up, unaffected by voltage fluctuations. – Double diameter connection provides a sealed, leak-proof, and shockproof design. – In automatic mode, the controller adjusts the fan to high speed when air quality (temperature, humidity, VOC value) exceeds the set threshold, and the fan stops once the air quality drops below the set value. By drawing inspiration from industry leaders while maintaining a distinct brand voice, Longwell can effectively communicate the superior design and performance of its products to customers.