Ignis Freestanding Ventless Bio Ethanol Fireplace - Tempo Ventless - no chimney, no gas or electric lines required. Eco-Friendly - doesn't produce any smoke, sooth or dangerous gases. Freestanding - can be placed anywhere in your home (indoors & outdoors). Capacity: 1.5 Liter.. Approximate burn time - 5 - 9 hours per refill. Easy or no maintenance required.