Numbers and Titles



Includesdouble wall and single wall chimneys, breechings, and stacks.
See04 50 00 for refractory masonry. 22 34 00 for fuel-fired domestic water heaters. 23 24 16 for internal-combustion engine exhaust piping. 23 52 00 for heating boilers. 23 54 00 for furnaces. 23 55 00 for fuel-fired heaters. 40 15 00 for combustion system gas piping. 40 47 00 for refractories.
23 51 13Draft Control Devices
23 51 16Fabricated Breechings and Accessories
23 51 19Fabricated Stacks
23 51 23Gas Vents
23 51 33Insulated Sectional Chimneys
23 51 43Flue-Gas Filtration Equipment