4 Inch Inline Duct Fan 146 CFM with Variable Speed Controller, EC Motor

• 🛒【High Quality Material】 Durable metal housing, ideal for long duct runs. Designed to combine EC motors for truly quiet and energy efficient performance, the 4" radon fan is suitable for air temperatures from -4°F to 140°F.
• 🛒【Energy-Efficient Ventilation】Duct Size: 4" | Air Flow: 146 CFM | Noise: 48 DB | Air Pressure: 945 Pa | Speed: 7500 (RPM) | Power: 32W | Size: 6.5 x 5.7 x 5.7 In
• 🛒【Super Wind Pressure】Hon&Guan inline fan featuring a PWM-controlled motor mastered the core technology, the new generation of duct fans of wind pressure (945 Pa) is far ahead, can be more efficient air convection
• 🛒【Adjustable Controller】 The 4-inch duct fan includes a variable speed controller, which can adjust the air volume in ten steps, and the noise level is only 48 decibels even at the maximum air volume.
• 🛒【Application Scenarios】Designed to quietly ventilate grow tents,hydroponics, DIY 3D printers, and HVAC systems, transfer heating/cooling to rooms, circulate fresh air, cool AV closets, exhaust odors.

Air multiplier, utilizing technology from jet aircraft engines and car turbocharging, sucks in air through the bottom suction holes. The impeller hidden inside the edge of the circular ring sprays out the air in a circular trajectory. Due to the forced blowing out of the air, the amount of air passing through can be increased to 15 times the original amount.