The Stacked Red Oak Vent Free Log Set by Duluth Forge is designed for use with Natural Gas only, offering an efficient and reliable heating solution with a realistic wood-burning appearance. You will experience a mess-free, realistic, quality gas log set that includes the convenient feature of a Thermostatic Control giving you the ability to customize the heat settings in your room. This rich, hand-painted, ceramic fiber log set provides excellent details emulating the realism of a wood fire. This log set is designed to reflect a stacked stack and was developed using real wood molded to create the look of a new fire with bark and stacked wood elements being the focus. Receive and enjoy both quality and the efficiency of 30,000 BTU of Vent Free Heating with the Stacked Red Oak Vent Free Gas Log Set. Material: Wrought Iron.