I have typically had a furnace in my study room.
I don’t know why, but my study room has typically been quite a bit chillier than the rest of my house.
It is no fun trying to sleep in a cold study room, at least for me. I absolutely have a strenuous time falling asleep when I am cold. I have friend’s who are exactly the opposite, & they really prefer it to be cold in their study room at night. I have no idea how they do it, but they sleep better in a cold room. One of my friends even uses a/c while in the winter season months. I had no idea until she asked me to apartment kneel one week, & I stayed in her study room. I noticed that there was an a/c in the window, & it was the middle of February. When she got back from her trip, I asked her if she wanted me to help her get the a/c out of her window so that she would not lose heat through the window. She told me that she really uses her a/c throughout the winter season months plus the Summer months, even though she has her heating system on, she prefers just her study room to be extra cold, so she turns on her a/c. I don’t know why she just doesn’t leave the window open, although she prefers to use her a/c instead. I have to have a furnace in my study room, so I could not imagine using an a/c in my study room while in the winter season months. I would really freeze.