Do you mind if I smoke here?
Yes, I do. I'd prefer you didn't. The AC (air-conditioning) is also on.
Can I just turn off the AC for now and open the window and smoke indoors?
That's not a very good idea. It's quite hot outside. Why don't you smoke outside?
It's very hot and that's why I'd like to smoke inside.
Though the AC has the air-purifying function. I'd still rather have fresh air than smoke. Are you okay with that?