Quote:
Originally Posted by Howard Klepper
If you can do it, keeping your whole home at 40-50% humidity is the best thing to do. It's healthier for you and your family, and will not cause mold.
Humidifying a room is preferable to humidifying the guitar, or its case.
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Howard, if your house is at 50% and the outside temperature is 10 degrees, you will have all that vapor going somewhere, the most noticeable place will be on the windows, the most un-noticeable place will be vapor escaping to the attic, only to freeze, and then to melt when it will become apparent. The EPA even has safety guidelines for this.
Quote:
Outdoor Recommended Indoor Temperature Relative Humidity
+20o F. 35%
+10o F. 30%
0o F. 25%
-10o F. 20%
-20o F. 15%
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The context can be found here-
http://www.epa.gov/iedmold1/moldresources.html
It would be wonderful if it were a good idea to keep it at 45-50% all winter, but I think I'll rely on the EPA for this advice.