Duravent's DuraPlus chimney is designed to stay cool on the outside and provide a hot draft on the inside, while boosting stove efficiency. The triple-wall chimney features two insulating layers: ceramic blanket and air space. The ceramic blanket insulation is held securely in position, eliminating hot spots common with loose-fill type insulations. In the event of a creosote fire, the compressible blanket insulation permits the chimney liner to expand outward in a radial direction, providing a fire-safe design. The DuraPlus Chimney is a triple-wall, all-fuel chimney for use with wood stoves, fireplaces, furnaces, boilers, stoves, ranges, water heaters, or other appliances fueled by wood, oil, coal, or gas.