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HF-S Series


HF-75S 3 Inch 75mm Mixed-flow Inline Duct Fan

Material of frame, environmental protection material ABS. Hydrodynamics technology fan blade, high efficiency, high air pressure and low noise. Read More
Model HF-75S
Voltage 220-240V/50Hz, 100-120V/60Hz
Diameter 75 mm
Current 0.12/0.27Amps, 0.42/0.5Amps
Power 16/30W, 25/29W

Product Detail:

  • HF-75S 3 Inch 75mm material of frame: Environmental protection material ABS.
  • Application: quietly ventilate grow tents, transfer heating/cooling to rooms, circulate fresh air, cool AV closets, exhaust odours.
  • Protection Grade: IP44 protection level, dust proof and waterproof.
  • 2 speed variants with High and Low.


  • Powerful and Silent: The Mixed flow design combined with a EC motor for a truly quiet and energy efficient performance. With 2 speed variable controller, can precisely optimize the fan's speed and low energy.
  • Hydrodynamics technology fan blade, high efficiency, high air pressure and low noise.
  • HF-75S 3 Inch 75mm Fan blade is designed according to hydrodynamic principle to reach the optimal airflow and air pressure, high efficiency working and low energy consumption.

Mixed Air Flow:

  • It comes with Japanese NMB ball bearing, it last long, having the 30,000 hours life.
  • It can be designed with user friendly features such as time delay, temperature sense, humidity sensor or other customized functions based on the need.
  • The Backdraft damper designed inside, to prevent return air and insects.


  • Lower connection costs and faster installation. Protection Grade: IP44
  • The silent duct fans offers solution to ventilation problems, especially in places where people work and live and low sound level is required, such as meeting room, office, hotel, public place, residence, hospital, gym and etc.

Power and Performance:

  • Power Consumption: It has a very low power consumption rate. The efficiency is due to by its latest mechanism and power efficient motor.
  • Exhaust and intake air: Making fresh air to rooms in a quick and reasonably quiet way, circulate fresh air, control humidity, excess heat, smell and air quality in grow area.
  • Removable duct ends with locking tabs for quick removal and easy maintenance.

Low Noise:

  • This product comes with low noise technology. High quality blades and EC motor performance makes the very low noise.
  • One more important aspect comes with zero vibration, which indicates the perfection of manufacturing of the product.


  • Hongguan, while manufacturing the products focuses on every aspects of quality and usability.
  • Built with cutting edge brushless electronically commutated Motor (EC) motor and dual jet type impeller,
  • Setting angle: Horizontal, vertical and others angle


The new HF-75S 3 Inch 75mm is product can be used almost anywhere, as the most effective ways to improve your indoor air in all the ways. It will not only reduce expensive cooling bills at home but will provide you a powerful air flow. The silent and yet effective. It comes with double insulation and environmental friendly material. Small but mighty, you’ll enjoy the power and efficiency of Hongguan Inline silent duct fan. HF-75S 3 Inch 75mm with smart air flow. You can just say mixed air flow inline duct fan near me and our product will come up! This is perfect product to buy in 2021 equipped with all the necessities.

Optional Functions

  • Double speed switch
  • Timer
  • Temperature, humidity sensor
Model Speed Voltage Size
Air Speed
Air Pressure
Net Weight
HF-75S H 220-240V/50Hz 75 0.27 30 2750 46 129 26 1.4
L 0.12 16 2550 43 114 21
H 100-120V/60Hz 0.5 29 2750 46 129 26
L 0.42 25 2550 43 114 21
- Can we order goods from you directly?
Yes, we look forward to receiving your order. However, please note our minimum purchase quantity. f you require smaller quantitieswe will be happy to arrange an individual delivery. We would be delighted to assist you.
- Can i get a discount?
This depends on the specific situation, you can call directly to consult.