The Moist-N-Aire humidification system is perfect for humidifying large areas. Easy-to-use, these systems use a built-in, electronic humistat control system to maintain your desired humidification levels in areas up to 50 cubic feet. All you have to do is fill it up, turn it on, set your desired levels and forget about it. No muss, no fuss. These humidification units are built tough and built to work, worry free, guaranteed.