I'm in Colorado at 8,000 feet and looking to use wood as a primary heat source. I have always had wood stoves and love them, but the house I have just moved into has a fireplace and not a good one. So, I'm trying to figure out if an insert or fireplace could be used as a primary heat source for a 2,000 sqft house? I know a good wood stove would be ideal, but I just don't have a very good spot for it and there's already a chimney and fireplace, so I'm feeling like I need to go that way if there's something that will work for heat and not just look pretty. I have about a 40" by 22" opening. Any recommendations on good models? Thanks!