I got this distiller because I use a humidifier and distilled water is hard to find in stores. The process is the easiest and I have saved a ton of money distilling my own. One full jug distills around one gallon of water. It takes about 4 hours. All I have to do is fill the jug, pour it in the distiller, put the jug under the spout, turn the machine on, and let the magic begins! I always let the water cook before transferring to another jug.