ductwork

[duhkt-wurk]

noun

a system of ducts used for a particular purpose, as in a ventilation or heating system.
the pipes, vents, etc., belonging to such a system.

Also ducting.

Origin of ductwork

First recorded in 1930–35; duct + work
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019