Our KEYSTONE MAKE Centrifugal Spot Humidifier Unit consists of specially designed 3 / 4 HP high-speed electric motor suitable for 400 / 440 V, 3 Phase 50 cycles, A.C. supply. The Humidifier throws approximately 2200 / 2400 CFM of air & evaporates up to 40 litters of water per hour. Our unit is available in Two different models (Fixed Type & Revolving Type)