Ignis Ventless Bio Ethanol Fireplace Magnum with Safety Glass Ventless - no chimney, no gas or electric lines required. Easy or no maintenance required. Easy Installation - Mounts directly on the wall (mounting brackets included). Capacity: 1.5 Liters per Burner. Approximate burn time - 5 - 9 hours per Burner per refill. Approximate BTU output - 6000 per Burner (Total BTU - 18000).