Though there are certain limitations to Liquid Propane when compared to the usage of natural gas, Flare Fireplaces does offer the ability to run your fireplace with a Liquid Propane tank. Liquid Propane burns more efficiently and hotter than Natural Gas so to accommodate this increase in heat we must use smaller orifices to achieve a lower BTU, causing your flame to appear smaller than on a unit run with Natural Gas. Flame height on Flare Fireplaces using Liquid Propane is roughly 4-6” in height because of this adjustment. In situations where a Flare fireplace is ordered with Liquid Propane we will ship an advanced 3D-Burner now equipped with adjustable leaves used to cover burner ports. Helping protect media placed over the burner from sooting, and in certain situations, increasing overall flame height