Ignis Portable Tabletop Ventless Bio Ethanol Fireplace - Tower (Black) Ventless - no chimney, no gas or electric lines required. Eco-Friendly - doesn't produce any smoke, sooth or dangerous gases. Tabletop - Portable - Place it anywhere in your home. Capacity: 0.4 Liter. Approximate burn time - 2 hours per refill. Easy or no maintenance required.