A cheerful fire in the fireplace on chilly evenings or coldwinter nights is a welcome addition to any home. Not everyone wantsto carry wood, scrape or shovel ashes or soot, or have a lot ofclean up, however. Also, many people with breathing problems cannottolerate smoke from wood fires. In those cases, a ventless gasfireplace is the perfect solution.Either liquid propane or natural gas is the fuel used in ventfree gas fireplaces, with natural gas being the most popular, as itusually generates more heat than propane. In a traditional woodfireplace, over 80% of the heat escapes through the chimney. Sincethe ventless gas fireplace does not require a chimney, it operatesvery efficiently and inexpensively. Without a chimney to lose heat,all of the heated air is circulated back into the home, in