I have a fire place in my house that needed some work so the privous owner decided to put in a vented gas insert to save on the chmini rebuild. The issue with this is all of the heat goes up the chmini instead of the house. I would like to convert the gas insert to a direct vent. I know this requires new logs, I can take the glass off of the existing insert and plug the vent hole with some sheet metal. Any thoughts on converting?