My younger sister is currently in college out of state. Every few months she has a break and she generally comes home to visit. During these visits she stays with me at my house. My sister is difficult. She likes her bed made a certain way, she likes specific laundry detergent and softener and she has to have her room at the perfect temperature. Luckily a few years ago, my husband and I invested in a new HVAC system which has zone control functions. My sister can have her room how she likes it while she’s here without it affecting the rest of the house. Growing up, my sister would always change the temperature on the thermostat. She likes things very warm compared to me. I remember my mother yelling at her time and again and yet she just had to have that temperature where she wanted it. The rest of us just had to suffer through the heat. Now, when she stays with me, that isn’t even an issue. Honestly the cost and everything for this HVAC system was totally worth it just for that! I don’t know how I could sleep if she had the heat cranked up like that all the time while she was here. It takes some strain off our relationship for us to be able to both have the heating and cooling conditions we like in our own spaces. At the end of the day, we are sisters, and we do fight, but not about HVAC! I am so glad I thought of that when we installed the new HVAC system! Yes!