Lively flames with a large ember bed are features of the G18 Natural Gas Vent Free Burner System - 24"/30". This burner will add efficient heat and unmatched beauty to your fireplace. This burner features three seperate flames for added realism! Select from a number of control options are available for this natural gas system. Remote Burner Variable Remote Burner Electronic Remote Burner This vent free gas log set operates on natural gas with the chimney flue closed, and is an efficient heat source because 100% of the heat generated stays in your home. The burner comes with a pre-assembled flex hose for easy of installation and added safety. Vent-free burners add moisture to the air, so it's important to install them in a room with proper ventilation to avoid formation of mildew. Please Note: Before installing any gas burner system, check your local and state codes.