The Hearth Cabinet™ is a ventless fireplace system that burns a patented alcohol fuel cartridge. You don't need a gas line or a chimney and it does not use electricity. This is the ONLY ventless fireplace approved for use in NYC. There is a real flame but no smoke. You get a beautiful golden yellow fire without smoke that lasts about two hours. Hearth Cabinet™ burns an odorless, non-toxic isopropyl alcohol gel. Gel fuels are the cleanest burning fuels you can find for a fireplace. Also the aluminum gel cartridges can be recycled, making Hearth Cabinet™ an eco-friendly alternative to a wood-burning fireplace.