206430/6T-WSK 6" WALL SUPPORT | The Type HT wall support kit has been tested for use fully enclosed and has been designed in 5, 6, 7 and 8 in sizes to carry up to 60 ft of height at 2 in from wall. The capacity of the larger sizes, 10, 12 and 14 in, is 40 ft of chimney. The wall support is intended for use with the Insulated Tee as an interior or exterior support where the chimney has a lateral connection.