to UL 103HT (MH7399)|UL Listed

• DuraPlus Through-The-Wall Kit 2 in clearance to combustibles Use for through the wall installations

DuraPlus is designed to stay cool on the outside, to provide a hot draft on the inside, to boost stove efficiency and to provide for a fire safe design that protects both the chimney and the building. This triple wall chimney features two insulating layers (ceramic blanket, plus 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 outwardly in a radial direction. Designed for normal, continuous operation at 1000 deg F flue gas temperatures, DuraPlus is subjected to rigorous and stringent HT requirements one hour at 1400 deg F, plus three 10 min chimney fire tests at 2100 deg F.