This year transform your drafty masonry or metal woodburning fireplace into an efficient, economical and dependable heat source with the beautiful Lopi Discovery gas insert. The variable 31,000 BTU/hour, patented Ember-FyreTM burner is paired with a unique two stage heat exchange system to achieve a remarkable 80% efficiency with natural gas or 80.5% with propane with all the beauty of a wood fire. The Discovery fireplace insert is certified as a "direct vent furnace" distinguishing it from "decorative" gas appliances. The Discovery also adds striking design features that compliement any decor. The standard Discovery has a black door frame and black face. Optional door frames are available in 24 karat gold, antique gold and pewter finishes.