COMPACT YET POWERFUL - This inline fan utilizes dual jet type blades to achieve high airflow of 160CFM. It moves A LOT of air for size and power, It's a lot bigger in terms of cfm movement! It is smaller, stronger and consumes less. Occasions when ducts were extended, backflow preventive damper or deodorizing filters were installed, suction power would not be significantly weakened. It can operate in 24/7 heavy-duty conditions. ENERGY EFFICIENCY - This DUCTURBO 4 inch inline fan features a variable speed controller that enable you to optimize the airflow at will. It uses a brushless EC motor and consumes only 20W/h at max speed. By adjusting the speed, it can control noise level as well. It is a fan that pay itself in the long run. If you need to run the fan at full speed all the time, then bigger fan would be better choice as it would be quieter and more energy efficient due to lower rotational speed. ROBUST CONSTRUCTION - The casing is of aluminum being coated with a MAT black finish, it’s lightweight yet sturdy and anti-rusty. Unlike other plastic ventilation fans which are easily cracked and non-durable, the outer metal casings would prevent it from accidental damage. The blades are of flame-retardant PBT material. Its hardness enables it to revolve smoothly and powerfully without deformation even at high speed. Highly durable dual ball NMB bearings are used to enhances fan’s longevity. MULTI APPLICATIONS - It can be used for intake or exhaust air, heat transfer, sub floor ventilation and roof space ventilation, warehouse ventilation, dog kennels or pet rooms deodorization, grow tent or hydroponics air circulation. It can also move air in toilets, bathrooms, en-suites, laundries and kitchens in homes, hotels, apartments and commercial buildings. It can be connected to ducting or piping and can generally be ducted long distances whilst maintaining strong performance levels. SERVICES & SPECS - Every single fan would undergo strict QC prior to shipment. Duct Size: 4”| Dimensions: 6.26 x 7.24 x 5.91 in. | Airflow: 160 CFM | Noise: 56.8 dBA | Bearings: Dual Ball | Controller Cord Length: 16 FT(5 MTR) To keep a good air circulation indoor, a reliable ventilator would be highly significant. EC Motor Our fan contains a cutting-edge EC Motor including variable speed controller. This enables the inline fan to operate considerably quieter and reach low speeds without generating loud noise or heat. Unique Design Featuring a mixed flow design, the fans maintain larger CFM and higher static pressure. Static pressure is of very important factors in fan performance. Some other fans fail to perform well against back-flow. Our duct fan achieves 334 PA static pressure at its max 5000 RPM. Blades Two jet type blades create optimum airflow. That means higher air pressure, stronger airflow, better efficiency. It moves 160 CFM(275 m³/h) at max speed. Speed Controller Fan speed can be adjusted within 0-100% range at your will. The controller cord is 16 FT long, with 2XTRRS 3.5MM MALE JACKS both ends. Parameters Power Supply: 220V AC, 50/60Hz Material: PBT & Aluminum Speed: 5000 RPM Air Flow: 160 CFM(275M3/H) Air Pressure: 334PA Noise: 56.8dBA Duct Size: 4INCH (100MM) Power: 20(W) Applications: Can be installed in any locations, such as grow tents, bathrooms, sub floor, attics, grow rooms, pet house or anywhere you need improved airflow. Package List 1 x Duct fan 1 x English User's Manual 1 x Speed Controller 1 x Mount Accessories Installation: Loud noise caused by vibration may take place if the unit is mounted directly on a soft wall. Hanging or installation on a solid wall is recommended to reduce vibration.