Lights fully in less than 5 minutes. Burns for 3 hours*. Burns Cleaner than Wood. Duraflame fire logs light faster and burn more completely than firewood, and because far less material is consumed when burning a fire log, significantly fewer pollutants are emitted than a comparable wood fire. 80% less fine particles** 75% less carbon monoxide** 90% less hazardous air pollutants** Saves Trees: Duraflame fire logs use recycled wood and agricultural fivers, saving valuable natural resources. A duraflame fire log consumes 80% less material than a comparable 3-hour wood fire, and burning fire logs instead of wood results in significantly fewer trees cut down for use as firewood. America's #1 Fire Log Brand Burns for 3 Hours* Fast Lighting Burns Cleaner than Wood UL Classification Mark Chimney Safety Institute of America Accepted Product™