What is the ideal humidity for a shop?
Michael Dresdner:Â Anywhere from 40 percent to 60 percent would be considered within acceptable range by most factories which control their interior humidity, though one guitar company I know of monitors theirs to stay within plus or minus two points off ideal. Ideally, the humidity in your shop should reflect the typical humidity where the pieces you make will finally reside. For most of the U.S., that would mean about 50 percent relative humidity, which is more or less an ideal median humidity for a home.