I don't think he doesn't care. He just doesn't seem to understand why it's important.I could be wrong, however, the way you keep stating things, it sounds like the boss really doesn't care about the business or the employees and equipment. Is this the only part of the business (the print shop just being an added business to it)?
The bay is the main sign shop where all the vehicles are wrapped and signs are made. Then we have an office building that holds all the office staff and small format production. Only 2 people work out of the bay. As of right now the people working out of the bay are the only 2 in the company that understand the importance of temperature control. I've shown him data sheets with the recommended storing temperature. We've talked to our supplier and they all say the same thing but he just doesn't want to listen.
I also feel like it's a money thing. He doesn't want to put a lot of money into something like ac because to him there is ways around it even if it's not working. Maybe he doesn't have the money for the whole bay, so that's why I'm looking at other options to at least help us get through the summer.