Elimination of sharp edges by hemming the flue and casing
Assembly and disassembly, without tools, using positive twist-lock
360 deg rotation of small dia fittings using swivel tees, wyes, and elbows
Space savings inside standard stud walls using oval pipe
The vent shall be constructed of an outer wall of galvanized steel 0.018 in thk G-90 for sizes 3 to 14 in Dia and 0.024 in thk G-90 for sizes 16 to 30 in Dia
The inner wall shall be constructed of aluminum alloy 0.012 in thk for sizes 3 to 8 in Dia and 0.018 in thk for sizes 10 to 30 in Dia