030702
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Quantity calculation and BOQ listing of ventilation ducts (supply/exhaust/fresh air): measurement is not split by system; listing splits by item characteristics (GB/T 50856-2024 Appendix G, code 030702)
Per GB/T 50856-2024 Appendix G, supply, exhaust, and fresh-air ducts all…
GB/T 50856-2024《通用安装工程工程量计算标准》第4.2.2条GB/T 50856-2024《通用安装工程工程量计算标准》附录G 表G.2.1 通风管道制作安装（编码030702）GB/T 50856-2024《通用安装工程工程量计算标准》附录N 其他及附属工程（支吊架需单列时）2026-09-12 - 02
Ventilation-duct quantity calculation and classified measurement: are supply/exhaust/fresh-air ducts computed separately, the developed-area rules, BOQ listing, and quota tiering calibers
Ducts are computed by design dimensions as developed area (m2): no deduc…
GB/T 50856-2024 通用安装工程工程量计算标准 附录G（表G.2.1 编码030702；表G.4.1 编码030704）GB 50243-2016 通风与空调工程施工质量验收规范 第4.1.4条及表4.1.4DB11/T 2382-2024 建设工程施工消耗量标准 第6.7节（通风空调安装工程）2026-09-12