Humidification is very important. I have 2 of these in my shop to maintain 50%
I have one of them with an automatic inlet valve. It was modified and purchased from a Humidor site that doesnt seem to sell them anymore. I have a spare valve that I will put in the 2nd one some day
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1