Quiet 4 inch 6inch 8 inch air extractor silent exhaust ventilation duct fan

• Combine the acoustic and duct working principle, special design for excellent sound attenuation.
• The shell is made of polypropylene plastic, with high anti-acid function.
• Built with Sound Absorbing Foam body
• Easy Dismounting Connector
• The impeller is made of ABS, designed by hydromechanics to reach the optimal air and pressure.
• Two-speed motor, Japanese brand NMB ball bearing, long working life to 50,000 hours.
• IP44 protection class, waterproof and dustproof more effective.
• Can be designed with a delay function, temperature sensors and humidity sensors, more of user-friendly features design.

Operating temperature range: -20°C~60°C.