Indoor Water Vapor Fireplace Hardtion Contemporary Style Brushed Stainless Steel Finish Advanced Water Vaporing Technology: Incredibly, life-like, patented 3-dimensional flame effect. Creates an illusion of fire and smoke. The worldâs most authentic fireplace experience. Multiple cassettes can be combined in series to achieve the desired length for dramatic stallations impossible to achieve with gas fires Fill the water tank with tap water Easy-fill water tank: Offers 30 hours of continuous operation before refilling is required.