Fast lighting - lights. Fully in less than 5 min. Burns cleaner than wood. Burns up to 4 hours (Variation in fireplace and climatic conditions may alter duration of burn). 50 years. Since 1972. This limited, retro edition package is a throwback to the original design from 1972, when the Duraflame brand was first introduced. For the past 50 years, Duraflame has brought people together and illuminated homes with a legacy of convenience, warmth, and dedication to the environment. Start something good. This box is SFI certified. Sustainable Forestry Initiative: Certified sourcing. www.sfiprogram.org. FireWise: Burns Cleaner than Wood: Duraflame firelogs light faster and burn more completely than firewood, and because far less material is consumed when burning a firelog, significantly fewer pollutants are emitted than a comparable wood fire. 80% less fine particles (Source: Dec 2005 Environment Canada/US EPA Reg. 5 'Content and emission characteristics of artificial wax firelogs'). 75% less carbon monoxide (Source: Dec 2005 Environment Canada/US EPA Reg. 5 'Content and emission characteristics of artificial wax firelogs'). 90% less hazardous air pollutants (Source: Dec 2005 Environment Canada/US EPA Reg. 5 'Content and emission characteristics of artificial wax firelogs'). Saves Trees: A Duraflame firelog consumes 80% less material than a comparable 4 hour wood fire, and burning firelogs instead of wood results in significantly fewer trees cut down for use as firewood. Recycled & Renewable: Duraflame firelogs use recycled and renewable wood sawdust and agricultural fibers, saving valuable natural resources. The renewable fibers are mixed with blends of wax and other combustible, renewable materials