About 3 weeks ago I received a humidity controlled display case from www.acousticremedycases.com for my Boucher OM, sort of an early Christmas present. I selected the flamed maple walnut floor stand. These are marketed as an attractive, albeit expensive way to store your guitar outside of its case. It’s basically a hermetically sealed environment and you just put two humidipaks in the bottom and you are set. Winter like temps are here and I’ve had an opportunity to track the RH in the case. Prior to this I simply used the humidipak system in my guitar case for humidity control. I have forced air gas heat. With indoor RH levels between 27%-31% the case has maintained RH levels of 45%-46%. I usually pop the case open at least once a day to play. So this thing does as advertised, and it’s actually easier to get to your guitar than having it in a traditional case. An unscientific comparison to another closed environment: I keep my electrics in a 22 cubic foot gun safe, not hermetically sealed. During winter I place a large cup or mug full of water in the bottom of the safe. With room RH at 27% I was reading 37% in the safe. Not bad. These things run about the same amount as a Hoffee or Calton case, but are not portable.