Vent free gas stoves are a perfect technology for someone who wants to have an efficient supplementary heat source in places where there is limited space for building in a typical vent free firebox or a fireplace (e.g. sun room, glass enclosed porch, etc.). Vent free stoves work exactly the same way as any other vent free appliance (read more about vent free burners and log sets or fireplaces), but all they require is the gas line connection and meeting clearance to combustible materials requirements.
Vent free being the most convenient and easily installed technology, can also serve as an alternative to vent free gas log sets to add the "old world" charm to a fireplace.