ductwork

基本解释

Ventilation for buildings - Ductwork hangers and supports - Requirements for strength.
建筑物通风。管道悬吊装置和支撑物。强度要求。
chinafanyi.com
These measures enabled the removal of low ceilings and ductwork, and significantly reduced the home's energy consumption.
这些措施能够移除较低的天花板和管道系统，并显著降低家庭的能源消耗。
ip.com

But the energy consumed is much less than the energy delivered into the ductwork.
FORBES: Magazine Article
Many homeowners will have to rearrange ductwork and interior walls to fit the high-SEER units, which can be twice as large as the ones they replace.
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With a few mouse clicks, the co-worker sent a signal over the Internet that remotely shut off the power to a single fan inside a 10-foot section of ductwork directly above the microphone.
FORBES: Magazine Article