Silent High Speed Inline Exhaust Fan

This Silent High Speed Inline Exhaust Fan, developed for ducted ventilation scenarios with strict noise requirements, is a low-noise, high-speed ducted exhaust device that can be installed in series in ventilation ducts. In ventilation systems of residences, hotels, hospitals, offices, and other venues, traditional ducted fans have high noise and strong vibration, with operating noise propagating through ducts to indoors, seriously affecting living and usage experience. Our Silent High Speed Inline Exhaust Fan systematically reduces noise from four dimensions: fan aerodynamic design, motor selection, body sound insulation, and vibration-damping installation, with low-speed operating noise as low as 28 decibels and high-speed operating noise not exceeding 45 decibels, virtually inaudible in ventilation systems. The device uses a high-speed backward-inclined centrifugal impeller with maximum speed up to 5,000rpm, paired with an optimally designed spiral volute air duct, with airflow transitioning smoothly without eddies in the duct to reduce aerodynamic noise at the source. The fan uses a DC brushless motor paired with rubber shock-absorbing pad installation to cut off structural sound transmission paths. The inner walls of the body are fully lined with 25mm thick high-density sound-absorbing cotton to absorb residual noise, ensuring extremely low outlet noise.

For performance and installation, this Silent High Speed Inline Exhaust Fan uses a circular duct interface design, directly installable in series in circular ventilation ducts, with convenient installation and no additional space occupation. The device supports multiple duct diameter specifications (100mm/125mm/150mm/200mm optional), adaptable to different-sized ventilation duct systems. Maximum airflow up to 3,000m³/h and maximum pressure up to 800Pa, overcoming resistance of long ducts to ensure sufficient airflow at terminal outlets. The fan is equipped with a PWM stepless speed regulation system, precisely adjusting speed and airflow within 0-100%, allowing users to select appropriate airflow gears based on actual needs. The device supports 0-10V analog signals, PWM signals, and RS485 communication control, conveniently integrating with building automation systems and smart home systems. The motor uses a fully sealed design with IP44 protection rating, usable in humid environments, suitable for ventilation and exhaust in humid places such as bathrooms and kitchens. The fan is equipped with overheat protection and overload protection, ensuring safe and reliable long-time operation. Our factory has decades of fan manufacturing experience, with core silent fans and impellers all self-developed and produced, producing 10,000 complete fan units monthly, holding multiple ducted fan noise reduction technology patents. Each Silent High Speed Inline Exhaust Fan undergoes unit-by-unit noise testing in a professional anechoic chamber before shipment, ensuring every device's noise value meets nominal standards, while undergoing airflow testing, sealing testing, and continuous operation testing. For overseas HVAC engineering contractors, hotel and residential developers, silent room construction builders, and quality-conscious consumer groups, the Silent High Speed Inline Exhaust Fan is a high-end ducted ventilation product with 'extreme silence' as the core differentiating selling point, suitable for key promotion in projects with strict noise requirements such as high-end residences, star-rated hotels, hospitals, and recording studios.

High-end residence and villa whole-house silent ventilation system; star-rated hotel and guesthouse room low-noise exhaust; hospital ward and sanatorium quiet-environment ventilation; recording studio, live streaming room, and library silent ventilation; bathroom and kitchen humid-place exhaust; office building and office silent ventilation system.

We have an independent R&D team supporting full-range customization of silent ducted exhaust fans. Customers can provide technical parameters and project requirements, and we complete custom solutions and samples within 15 working days. Customizable content includes: duct diameter specifications (80-315mm range optional), airflow and pressure specifications, motor power and type (DC brushless / AC EC optional), control method (three-speed switch / stepless speed regulation / smart sensing / remote control), exterior color and silk-screen logo, filter configuration (can add primary / medium filters), waterproof grade upgrade (customizable IP55+), and packaging design. We provide free sample confirmation, MOQ is 100 units, with small-batch project trial orders supported.

We are ISO9000 quality management system certified and have established a dedicated quality inspection process for silent ducted fan products. Each Silent High Speed Inline Exhaust Fan undergoes before shipment: professional anechoic chamber unit-by-unit noise test (ensuring nominal noise value is met), standard airflow test bench verification of actual airflow and pressure, duct sealing test (air leakage rate ≤2%), 8-hour continuous operation aging test, motor temperature rise test, electrical safety test, and vibration test. Sound-absorbing cotton has undergone flame retardant performance testing, and motors have undergone noise and vibration testing. We accept third-party inspection and can cooperate with agencies such as SGS and BV for pre-shipment inspection, providing noise test reports.

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