SonicAir Humidifier An easy to use, affordable grow room humidifier which is most importantly RELIABLE! This SonicAir 10 Litre Humidifer features a large 10 litre tank and an adjustable dial which allows for fine tuning of your misting and will deliver up to 800ml per hour at maximum output. Unlike other ultrasonic humidifiers in its class, the SonicAir has four multi-directional spouts on the top which help to direct the mist evenly around your grow room.