The Ideal-Air Pro Series Ultra Sonic Humidifier is designed with ultra-sonic transducers to supply ultra-fine water particles. This is to help form a more balanced humidity field over your plant's entire canopy. Ideal-Air? Pro Series Ultra Sonic Humidifier plates are made from cold-rolled steel and a stainless steel box with a standard water inlet with overflow safety switch, reservoir drain outlet, sediment filter, LED display and humidity control (30%?90%). This unit is designed to produce up to 150 pints per day of ultra-fine mist. 115 V, 60 Hz and 2.7 Amps. We recommend all Ultra Sonic Humidifiers be ducted, using 4 in PVC or 4 in DWV plastic pipe works best. Units should not be run without ducting or the top of the unit may be covered in water and shut off. Please don?t fill the unit through the discharge piping outlets. Doing this will overfill the tank and prevent the unit from creating humidity. The unit should only be filled through the provided hose and float valve to ensure proper water level and correct operation.