UNSPSC 40141925: Air and flue gas ducting

Ducts are defined as air tight conduits that convey air or flue-gas under positive or negative pressure.

UNSPSC 40141925 Air and flue gas ducting, a Commodity code, covers replacement and retrofit of air duct systems, dampers, terminal boxes, and related smoke control and building automation components installed in institutional and municipal facilities. State and local governments procure this work primarily through county facilities departments and municipal utilities when renovating public buildings such as corrections facilities, water treatment plants, and transit operations centers. The scope includes installation of UL-compliant smoke control systems, fire and smoke dampers, duct heaters, air handling units, energy recovery units, and building automation system controls, along with associated structural work such as ceiling tile and gypsum board patching. Solicitations typically require contractors to furnish labor, materials, and equipment; maintain temporary HVAC services during construction; and coordinate work around operational business hours or utility service windows.

Recent activity centers in Florida and the Pacific Northwest. Orange County, Florida issued IFB Y26-718 on October 6, 2026 (sealed bids due October 20, 2026) for replacement of the entire building automation system with Johnson Controls Metasys controls, installation of smoke control systems, and retrofit of fire/smoke dampers at the Corrections Booking and Release Center, with an estimated contract value of $2.89 million; the solicitation requires electronic submission via OpenGov e-Procurement, a 10 percent bid bond, and names Service Disabled Veteran-owned businesses as eligible for a 5 percent preference. The City of Leesburg, Florida posted IFB 26-015-LK for replacement of 3,500 linear feet of 12-inch water main (due June 18, 2026), which while nominally a water utility project, did not represent activity directly under this code. The City of Charlotte issued RFP 26920271769 (due October 15, 2026) for boiler and chiller maintenance and repair services at CATS transit facilities, which similarly does not align with duct and smoke control work. The mismatch between the code's stated scope and the opportunities listed suggests limited recent state and local activity directly targeting air and flue gas ducting, or misclassification of opportunities in the source data.