With two open sides, Flex Double Sided fireplace insert creates the perfect room divider. The see-through design provides unobstructed views of the flickering flame from the front and the back, infusing warmth and ambiance into two adjacent rooms. With an EcoSmart Flex 50DB.BX1, you have design freedom with the choice of a Decorative Box on the left or right-hand side. Both designs are fitted with a glass panel that divides the box and the Firebox and creates an attractive streamlined look. Instantly transform any wall into a feature, indoors or out, with a stylish, clean-lined Flex Firebox. The XL500 burner, the 'baby' of the XL Series, delivers a stunning, long-lasting linear flame. It may be compact in size, but with a 1.3 gallons capacity, this ethanol burner can heat up to 431ft2. Efficiency is a key feature of this burner, delivering up to 13 hours of heat generating flame off a single refill.