When selecting AC fans, you must prioritize Airflow Volume (CFM) and Static Pressure to ensure the cooling capacity meets your requirements. Pay close attention to the Bearing Type: Ball bearings are preferred for long-term, continuous operation (up to 50,000+ hours) and high-temperature environments, while Sleeve bearings are more cost-effective for vertical mounting and shorter lifespans. Additionally, verify the Input Voltage (110V/220V/380V) and Frequency (50/60Hz) to ensure compatibility with the target market's electrical grid.