The Trion 707U Humidifier System incorporates all the features necessary to properly humidify a large area in a simple Do-It-Yourself kit. This system is designed to connect directly to a water source, will automatically refill, and a single unit can maintain up to 75-80% relative humidity in an area as large as 3000 cubic feet. The 707U is a hard wire system and will require access to electricity.  To provide a measurement and reading of the exact humidity, a separate hygrometer gauge is needed.