Fireplaces look inviting in a home but are highly inefficient when it comes to heating. The solution is a wood (or pellet) burning stove installed directly into the fireplace as illustrated in this picture. It looks much better than an insert, and if well-matched to the fireplace, imparts ambience as well as warmth to the room.
The Tree of Life™ cast iron gas stove by Avalon has a beautiful three-sided fire-view that is inspired by the natural arches of interlocking trees and branches. Available at Rich's for the Home http://richshome.com/