POPULA DPT series Large Air Volume Quiet Bidirectional flow Cabinet Fan Product Feature: Casing:Full metal enclosed housing,adopt Aluminum alloy frame structure and double access door design,easy to disassemble and maintain,ensure firmness,stability,safety and durability of fan. Performance : New-design multi-wings impeller with high pressure and double layers , spiral airduct with low resistance and double intakes , effectively reduce the air resistance inside the duct and the impeller,double motor and impeller ensure the fan powerful power and large air volume. PRODUCTS INFO Brand:POPULA Electric Current:AC Power:550-3000w Voltage:1HP/3HP 110V/220V/380V/440V/3KV/6KV Frequency: 50/60HZ Air Volume:1250-6500M3/h Air Pressure:210-550 Pa Speed:960r/min ,1450r/min,2960r/min Max Noise: