It's ok but ideally u want it between 50-60 during normal times and 70-80 during a shed. Too much humidity and lack of air flow can cause some health issues
A room full of empty racks and thermostats that have been unplugged.
Mine generally sits around 70%, but in the winter it dips down a bit, but not much. I haven't had any issues. I do keep a close eye on the tubs and replace the newspaper if it gets too wet.