The HT-10 chimney system is being
touted as the first and only prefabricated,
Class-A chimney capable of
installation with zero clearance to
combustibles. The system consists of a
series of 2-foot-high by 16-inch-square
boxes with interlocking joints that are
sealed with a fire-rated adhesive caulk.
At the core of each box is a 24-gauge
stainless steel liner that's surrounded
by a 1/4-inch-thick, high-density
ceramic fiber insulation that will contain
temperatures up to 2,100°F. Next
comes a 2-inch layer of mineral wool,
followed by a 1-inch-thick, highdensity
calcium-silicate refractory
board. Inside the house, the refractory
board can be drywalled, painted, or
wallpapered; on the outside it can be
clad with stucco, brick, stone, or wood
veneer. Three corbeling designs are
available to