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, crafted with an integrated aviation aluminum shell for enhanced durability, fire resistance, and superior heat dissipation. It houses a robust copper core motor and a double-sided all-aluminum impeller, utilizing centrifugal air circulation for efficient operation with minimal vibration, significantly boosting productivity. Features: 1. Durable Construction: Made with a one-piece aviation aluminum shell and double-sided all-aluminum impeller, offering fire resistance, high-temperature tolerance, and excellent heat dissipation. 2. Powerful Performance: Includes a high-efficiency copper core motor with fully sealed steel bearings, ensuring centrifugal air circulation without stagnation, for high wind pressure and rapid airflow. 3. Innovative Design: Engineered for dual-purpose blowing and suction, with a built-in silencer sponge in the air duct and dust filters at both air inlet and outlet. 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