UNSPSC 31261707: HVAC sound attenuator

A sound attenuator, or duct silencer, sound trap, or muffler, is a noise control acoustical treatment of Heating Ventilating and Air-Conditioning (HVAC) ductwork designed to reduce transmission of noise through the ductwork, either from equipment into occupied spaces in a building, or between occupied spaces.

UNSPSC 31261707 HVAC sound attenuator is a Commodity code covering specialized heating, ventilation, and air-conditioning equipment components and related overhaul services procured by state and local transit authorities, school districts, and facility operators. State and local governments buy under this code primarily through overhaul, modernization, and replacement projects targeting HVAC systems in transit vehicles and institutional buildings, where sound attenuation and noise control are functional requirements integrated into broader climate-control system upgrades. The issuing bodies sourcing these products span transit authorities managing vehicle fleets, school districts acquiring instructional and facility equipment, and other municipal agencies maintaining public facilities.

The Utah Transit Authority (UTA) posted RFP 2604043TD on April 24, 2026, to overhaul and modernize HVAC units on 38 Bombardier Bilevel commuter rail vehicles, totaling 82 units split between Stone Air and Westcode equipment, with conversion to R-407C refrigerant and modernized microprocessor controls; proposals were due May 25, 2026, and the contract runs through December 31, 2030. A second opportunity—Klein Independent School District's RFP 26-101, posted April 17, 2026, with proposals due June 5, 2026—sought Career Technical Education and Advanced Academics instructional resources across 17 CTE program areas and advanced academic tracks, though the school district solicitation appears tagged to this UNSPSC code without clear alignment to HVAC sound attenuator procurement. Recent activity in the code centers on the UTA transit modernization work in Utah; the Klein ISD posting suggests misalignment between the code assignment and the actual goods and services being procured, leaving limited substantive recent activity directly addressing HVAC sound attenuation components or services.