3 hour (Variations in fireplace and climatic conditions may alter duration of burn). Fireplaces. Fire pits. Campfires. Your mountain retreat begins. Fast, easy lighting. Simple, no mess. Clean burning. Crafted from real hardwoods. Additional safety and lighting instructions are included on firelog package. Burns cleaner than cordwood. Up to 75% less particulate matter (15th Emission Inventory Conference, New Orleans, May 2006). Up to 80% less carbon monoxide (15th Emission Inventory Conference, New Orleans, May 2006). These firelogs are made with recycled biomass products such as hardwood sawdust and ground tree nutshells. If your fireplace is functioning properly, emissions of this product should be vented outdoors. A properly installed and maintained fireplace and chimney will dramatically reduce the likelihood of combustion by products entering your home. An inadequate air supply or downdraft could cause a fireplace malfunction. If you suspect that your unit is not functioning properly, a qualified contractor should be consulted. Air Quality Advisory (Nov-Feb) Use of this and other solid fuels may be restricted at times by law. Please check 1-877-4No-Burn or http://www.8774noburn.org before burning. Learn more about Pine Mountain Firelogs at www.PineMountainfire.com or call us toll-free at us toll-free at (877) 402-5185. www.pinemountainfire.com. Classified UL. Processed solid fuel for use in factory-built fireplaces. Made in USA with wrappers from Canada.