Patent ID: 8747510

Claim:
An exhaust treatment unit for treating an exhaust gas from a combustion process, the exhaust treatment unit comprising: a core having a longitudinal axis, said core further including a longitudinally extending outer surface circumferential around said longitudinal axis; a continuous support mat having an inner surface and oppositely facing outer surface, said inner and outer surfaces having a width extending parallel to the core longitudinal axis and a length at least twice the circumference of the core outer surface, and including a first layer wrapped circumferentially around the core outer surface with its inner surface adjacent said core, and a second layer wrapped circumferentially around the first layer; and at least one layer of powdered insulation impregnated on selected areas of one of said inner and outer surfaces of the continuous support mat, said selected areas comprising less than the entirety of the one of said inner and outer surfaces of the continuous support mat.