These dual rated, Mountain Cedar, gas log sets can be installed in a vented or vent free setting. With three sizes to choose from, these 6-piece refractory log sets provide radiant heat and an attractive focal point.Certifications: CSA Design Ignition System: Millivolt Max BTU H: 30,000 Size: 18 Venting: Vent Free Weight: 61{The real deal: All of the log sets are inspired by nature and handpainted for incredible realism and life-like detail This gives every log set a truly unique and authentic look {Two styles refractory cement or ceramic fiber: Youll see log sets offered in one of these two materials Refractory cement log sets allow for more fine detailing while ceramic fiber log sets reflect more heat {Install almost anywhere: The log sets allow for installation in any existing firebox without the need for venting making them a terrific choice for just about any room in your home {Maximum savings: With a remarkable 99% efficiency rating, monessen vent free gas log sets maximize heating operation to provide optimum fuel savings {Classic series: These log sets feature burners with flames in the front and rear, adding warmth and ambience to any room PH burner Refractory cement for fine detailing Millivolt control valve with on off switch and manual variable flame height control Remote ready sold separately