If it were me, I'd just look into getting a wood stove. Much more efficient if you're wanting to burn wood to save on your heating bill. Most fireplaces are built for looks, not for heating. A wood stove and a nice ceiling fan will heat your house pretty well.
You may want to look into fireplace inserts. They run on gas and use outside air (via a duct) to burn. This would leave the heat inside, especially if you buy the model with the internal fan.