Ventless Fireplaces Designed by fireplace comapny based in New York,The Hearth Cabinet™ is a ventless fireplace system that burns a patent pending alcohol fuel cartridge. You don’t need a gas line or a chimney and it does not use electricity. There is a real flame but there is no smoke.The ventless fireplaces are said to be 100% safe and eco-friendly. They are available in traditional and contemporary standard modular designs that fit any style surround or mantel.