Manage heat on second floor of 2 story great room
I'm planning to build a home wiht a two story great room. It will have a 2 cathedral ceiling and a loft. Having never been in a loft that wasn't signifigantly warmer than the first floor, I am looking for advice on how to retulate the temperature there and at the peak of the ceiling so as to save energy on heat on the first floor and cooling for the loft. Will have a forced are system and an efficient fire place or stove. Radiant heating will not be considered an option. Thanks!