UNSPSC 40101724: Adsorption chiller

A chiller that forms a continuous refrigeration cycle by alternately adsorbing and desorbing in a number of independent adsorption towers by using the exothermic and endothermic phenomena caused by the reversible reaction between the adsorbent and the refrigerant.

UNSPSC 40101724 Adsorption chiller (Commodity) captures state and local procurement of specialized cooling equipment and related HVAC services, though recent solicitations show the code is applied inconsistently across a mix of standard air conditioning replacements, preventive maintenance contracts, and building system upgrades that span traditional packaged units, split systems, and computer room cooling rather than the adsorption chiller technology the code nominally describes. State and local issuing bodies soliciting under or near this code include municipalities (City of Huntsville, Texas; City of Tampa, Florida; City of Eastman, Georgia; City of Norwalk, Connecticut; Town of Waterford, Connecticut), counties (Okaloosa County, Florida; Broward County, Florida; Hancock County, Mississippi; Clay County, Florida; Williamson County, Texas; Montgomery County, Pennsylvania; Hillsborough County, Florida), state departments and agencies (Texas Department of Criminal Justice; Texas Military Department; State of Oregon Department of Administrative Services; Texas Health and Human Services Commission; Illinois Department of Corrections), school districts (Stephens County Board of Education, Georgia; Parkway School District, Missouri; Norwalk Public Schools, Connecticut), and specialized authorities (Charlotte CATS transit system; Los Angeles Superior Court). Recent work includes as-needed HVAC maintenance with 24/7 emergency response (City of Huntsville IFB 27-04, due October 27, 2026), installation of preconditioned air and ground power units at an airport (Okaloosa County ITB, due October 28, 2026), central AC system replacement (Georgia RFP 2027_01, due October 23, 2026), ductless split system replacement in an IT room (Town of Waterford IFB 26010, due October 13, 2026), boiler and chiller maintenance across transit facilities (Charlotte CATS RFP 26920271769, due October 15, 2026), and rooftop packaged unit replacements at correctional facilities and other public buildings across Texas.

The code sees geographic concentration in Texas (TDCJ multiple solicitations for packaged units and split systems; Williamson County dehumidification project requiring rooftop unit replacement with building automation integration), Florida (Okaloosa County airport PCA/GPU units; Broward County landfill split AC; Clay County EOC CRAC modernization; Tampa Water Department exhaust system replacement), Georgia (state agency central AC replacement; Stephens County school district districtwide HVAC improvements as part of $20–26 million renovation scope), Connecticut (Waterford community center and Norwalk school electrical and AC upgrades), and scattered activity in Oregon, Mississippi, Illinois, Missouri, Pennsylvania, and California. Representative opportunities include the Okaloosa County preconditioned air and ground power unit installation (ITB ITBAP0327, due October 28, 2026), requiring 45-ton PCA units and 90 kVA GPU units on airport boarding bridges with Davis-Bacon prevailing wage compliance; Williamson County's Inner Loop Annex dehumidification project under CSP61 (due September 17, 2026), seeking replacement of five packaged rooftop units and one 100% outside air unit with DX cooling, natural gas heating, and hot gas reheat integrated into an Automated Logic building automation system; and the City of Huntsville's broad as-needed HVAC services contract (IFB 27-04, due October 27, 2026), requiring 24/7 availability, two-hour emergency response, and certified technician staffing across all municipal facilities. The code lacks recent activity targeting adsorption chillers specifically, and most posted opportunities reflect standard rooftop package units, split systems, and preventive maintenance scope rather than absorption or adsorption cooling technology.