This humidifier came with my humidor,it has to be one of the easiest systems on the market. All you need is distilled water for under two bucks a gallon, no polypropylene glycol! You can see through it to the water level, no guessing when to refill. And it has a slider to adjust the level of humidification. The Diamond Crown is not inexpensive but IMO, one of the best,simplest devices you will find and worth the investment.
Edward R in Michigan January 21, 2012