Equipped with a powerful copper motor and high-precision bearings for effective rotor rotation. Ensures smooth operation, time savings, improved work efficiency, and reduced environmental pollution.This regenerative fan features a dual-purpose design for both blowing and suction, encased in a durable aviation aluminum shell that is fireproof, resistant to high temperatures, and offers excellent heat dissipation. It is powered by a robust copper core motor and includes a double-sided all-aluminum impeller for efficient air discharge through centrifugal circulation, ensuring smooth operation with minimal vibration to enhance work efficiency. Features: 1. Durable Construction: Made with a one-piece aviation aluminum shell and a double-sided all-aluminum impeller, providing fire resistance, high temperature tolerance, and superior heat dissipation. 2. Powerful Performance: Equipped with a copper core motor and fully sealed steel bearings for high wind pressure and speed, ensuring efficient air circulation without stagnation. 3. Thoughtful Design: Features a dual-purpose blowing and suction capability, with a built-in silencer sponge in the air duct and dust filters at both the air inlet and outlet for cleaner operation. Specification: Number of phases: single phase Speed: 2980rpm/min Operating temperature: -40℃~40℃ Inlet temperature: -40℃~80℃ Power: 120W, 180W, 250W, 350W, 550W, 750W, 1100W Maximum wind pressure: 7.5 kPa, 8.5 kPa, 9.5 kPa, 11 kPa, 14 kPa, 21kPa, 24 kPa Maximum suction: 6.7 kPa, 7.6 kPa, 8.6 kPa, 10 kPa, 13 kPa, 20kPa, 22 kPa Maximum ventilation depth: 0.5m, 0.6m, 0.7m, 0.8m, 0.9m, 1m, 1.2m Packing list: 1*regeneration fan 1*instruction manual