Upgraded 620W high-power inner rotor, die-cast aluminum alloy double-inlet impeller, optimized fluid for lower wind resistance. IP44 protection, stable at -25~60℃, CCC+CE certified. 1400rpm peak air volume 2980m³/h, static pressure 491Pa, low noise 65dB. Two-speed single-phase voltage is universal, and stepless speed regulation can be linked to differential pressure sensing, saving 38% of electricity. The large-size split volute provides full-dimensional electrical protection for the drive and is durable in industrial dust environments. It is suitable for spraying exhaust gas and large fresh air units. The spraying and wiring solutions can be customized.