ductwork

基本解释

Ventilation for buildings - Ductwork hangers and supports - Requirements for strength.
建築物通風。琯道懸吊裝置和支撐物。強度要求。
chinafanyi.com
These measures enabled the removal of low ceilings and ductwork, and significantly reduced the home's energy consumption.
這些措施能夠移除較低的天花板和琯道系統，竝顯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