Aygrochy Quiet 4 Inch Inline Fan with Variable Speed Controller, Using for Heating Cooling Booster, Grow Tents, Hydroponics,Home use Ventilation and Exhaust Blower.

【 Flexible control speed】Powerful blower with a Built-In fan speed controller. You can choose any speed from 0 to 100% using the included variable speed controller without creating background noise or hum at low speeds.
【Parameters 】DUCT DIAMETER: 4”(100mm) — Airflow: 205 CFM —Power 40W —Noise: 32 dBA —Pressure: 298Pa
【Quiet and energy 】Saving performance is very good: EC motors with mixed flow design and PWM control can use precise electronic pulses. This allows the embedded fan to run more quietly and reach low speeds without generating noise or heat. The energy efficiency of EC motors is also twice as high, and can save up to 40% of energy costs, and can recover costs in the long run.
【Wide applications 】This Inline Duct Fan are used in indoor grow facilities and vertical farms, heating and cooling transfer, commercial drying and air filtration applications. Our inline blowers can also create negative pressure environments, simulate wind, exhaust odors and smoke as well as intake fresh air from outdoors
【Easy Mount】This 4" Fan Is Made of Black ABS Plastic. It Can Be Easily Mounted to The Ceiling Of Your Grow Tent Using Ratchet Hangers Or Zip Ties.