Duraflame® 4.5LB FirelogsDuraflame 4. 5lb Firelogs provide up to three hours of warm ambiance, indoors or out. Benefits Robust flames that last up to three hours Lights quickly full flames in less than 5 minutes Burns 80% cleaner than wood Use in an indoor, open hearth fireplace or outdoor fireplace or fire pit UL approved safety classification for use in UL listed factory built fireplaces Chimney Safety Institute of America Accepted Product Save Trees A duraflame firelog