The landlord just made me put the electricity for my daughter who is in college in our name as she just moved in... so I didn't think anything about it. He dropped by to fix something the other day and told her not to turn the thermostat up to 78 during the day which she did to save energy as she is out for 8 hrs at a time. He said a girl in another somewhere around us would get hot and that her AC was controlled by our thermostat. This sounds really sketchy to me and I'm trying to figure out how to proceed from here. I spoke to an AC professional this morning who said it sounded to him like the units were zoned meaning they shared ductwork and Air. His face scrunched up when I told him what I was dealing with and he said it was dangerous because if the person we shared air with had MRSA or tuberculosis we would be susceptible to any diseases they would have. I like the apartment and don't really want to move her out as she's about to start school and this will be very disruptive. This man has done a few other things like taking the oven and stove out and replacing them with an old beat-up hot plate that doesnt work and an old toaster oven for the "full" kitchen. I removed them and put in something that worked and wasn't ready for the dumpster. I don't really trust him and I want to find out if we are paying for this girl's air conditioning and what else he has connected our meter to.What is the name of your state (only U.S. law)? South Carolina