Hot air rises, cold air descends.<quoted text>
Well, I just shut both of them upstairs a few minutes ago and semi-closed the one downstairs, set the temperature a little higher, and it's quite comfortable downstairs now.
Rarely is anyone upstairs during the day.
I'll do the opposite with the vents tonight and get a fan for me downstairs after everyone's gone to bed.
That makes a lot more sense to me.
You need ceiling fans to do any good.