Duraflame® Crackleflame®. Natural, crackling fire sound. Faster lighting. More robust flames. Firelog - Burns for 3 hours.. Net Wt 5 lb (2.27 kg). Lights fully in less than 5 minutes. More robust flames for the entire fire. Crackleflame® firelogs may be burned in all types of open-hearth fireplaces. They are designed to light fast and burn for 3 hours when used according to instructions. Variations in fireplace and climatic conditions may slightly alter duration of burn. Heat content is approximately 70,000 BTU. Burns cleaner than wood: Crackleflame® firelogs light faster and burn more completely than firewood, and because far less material is consumed when burning a firelog, significantly fewer pollutants are emitted than a comparable wood fire. 80% Less fine particles*. 75% Less carbon monoxide*. 90% Less hazardous air pollutants*. Duraflame firelogs are suitable for use in UL/C-UL/ULC listed factory-built fireplaces. Crackleflame® firelogs use only recycled wood and agricultural fibers, saving valuable natural resources. A Crackleflame® firelog consumes 80% less material than a comparable 3 hour wood fire, and burning firelogs instead of wood results in significantly fewer trees cut down for use as firewood. Made from 100% renewable resources: Crackleflame® firelogs are made from 100% renewable waxes and oils, combined with recycled wood and agricultural fibers. No petro-chemicals are used. *Source: Dec 2005 environment Canada/Us EPA reg. 5 "Content and emission characteristics of artificial wax firelogs". Duraflame, Crackleflame, the Duraflame Flame Symbol, the Duraflame trade dress, logo and FireWise are registered trademarks of Duraflame, Inc. www.duraflame.com. ©2011.