All of our heatlogs are derived from by-products of recycled wood and are sourced from managed forests. The high heat intensity and low ash content coupled with the lack of sparking and spitting once lit makes our heat-logs an ideal product for multi-fuel stoves and fireplaces. The seasoned solid fuel connoisseur should look to mix these economical smokeless heatlogs with our kiln dried or natural wood log products for that perfect warming experience.