Our shape creates bigger, brighter flames. Burns up to 4 hours. Burns cleaner than wood. Designed for better firelog performance. Fuller, brighter flames. More radiant heat. A safer design. Faster, easier lighting. UL classified: Processed Solid Fuel classified for use in factory-built fireplaces. Warnock-Hersey: For use in solid fuel burning masonry fireplaces, listed factory fireplaces, and fireplace inserts. Made in Canada.