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Hey guys,
I'm building my first acoustic guitar and I think I'm gonna set up in my grandpa's old woodworking shop because he used to make furniture and he has a lot of the tools I think I will need. Anyway, the problem is that it is the humidity levels are not consistent. There is a gap under the door and I don't think that it is insulated. But he used to make stuff in there so I think it will be ok. Where I am storing the wood now has a humidifier at 45%. But it is humid in the workshop, so I don't know what I need. I think a dehumidifier would work maybe, but all I am wondering is do I need a humidifier or dehumidifier and how do I keep the levels consistent between night and day. Thank you!!

You will find it very difficult to keep a steady level unless you have a sealed area, take a small area and insulate and seal and then with either AC or a dehumidifier you should be able to get your levels right

Hi,

My husband retired from HVAC, after 50+ years, which included specialized commercial applications, which menat strict control of humidity. I used to manage the service department of his company.

If you are primarily concerned with dehumidification, you can installed a dehumidistat, which will bring on the a/c in your workshop, based on RH, not temperature; this overrides the thermostat. You set the dehumidistat on the % of RH you wish to maintain.

To add humidity to a dry environment, we have a whole house humidifier, set at 45% RH, which comes on with the furnace. The caveat of this is that the humidifier only comes on with the furnace. Since we have 2 very high efficiency furnaces, they don't come on very often, so we still need further humidification in the house. For further control of a low humidity environment, a humdistat can be installed, which overrides the thermostat, to bring on the humidifier and furnace.

I'm sure in large commercial environments, humidity control is achieved by the combination of these controls.