I recently had the back end of my garage turned in to an office. Waterproof roof, insulated raised floor, insulated ceiling, insulated plasterboard walls, double glazed UPVC window, electric heater. It looks amazing and will be a great office for home working. It also needs to double up as my guitar room. I've got two kids now so eventually the "spare" room isn't going to be spare anymore. So my guitars which are three electric basses and an electro acoustic guitar ideally need to live in this office room, as well as amps and sundries. I want to take very good care of these guitars as well as other stuff in the room so I want to set the heating up to protect the pc monitors etc. from cold and damp.
In an ideal world what temperature would that be to hold the room at?
For a good enough to do the job what temperature should I set it to not drop below?
Will it make a difference if the instruments are stacked up in their cases vs out on stands?
Thank you