I tutor a student who is from India so his family likes to keep their house very warm right now since they're not used to the cold weather. I like a slightly warm house but when it gets too warm in my house I can easily turn down the thermostat. I've made comments before when I'm at their house that I'm getting too warm and so I'll crack a window open but I don't know what else to do. When I get too warm it makes me feel like I have a headache, my face will get flushed, and I just don't feel as effective as a teacher when I'm uncomfortable. This all may seem trivial but I'm wondering how else I can let them know that I'm not comfortable with how warm they keep their house?