PSC K041

Overview

The Product Service Code (PSC) system is the federal government’s standardized taxonomy for classifying products and services in procurement records. PSCs are used in reporting systems such as FPDS and SAM to enable consistent tracking, analysis, and reporting of procurements; the PSC Manual on Acquisition.gov publishes the codes and maintenance guidance and is the authoritative source for PSC definitions and groupings. ¹

PSC K041 is the four-character service code in the K (Modification of Equipment) group that identifies modification work on refrigeration, air-conditioning, and air-circulating equipment. Agencies use K041 to classify contract actions where modification (distinct from installation or routine maintenance) is the predominant effort. ¹

• See also on G2X:
  • G2X — PSC K041 overview
  • G2X — PSC J041 (maintenance/repair)
  • G2X — PSC N041 (installation)

What this PSC covers

• Major system alterations to refrigeration equipment and chillers
• Retrofits to air-conditioning units for improved performance or regulatory compliance
• Modifications to air-handling and air-circulating systems
• Upgrade or reconfiguration of HVAC control and distribution components
• Structural or mounting changes required to adapt existing equipment
• Conversion or replacement of core refrigeration subsystems during overhaul ¹

Related NAICS and PSC codes

Crosswalks from PSCs to specific NAICS codes are not published as a single authoritative mapping in the PSC Manual; conversion or assignment of a NAICS code is determined at the contract level by the requiring activity and contracting officer. Not specified by official sources. ¹

Acquisition and reporting notes

• PSC selection: contracting officers should select the PSC that best represents the predominant work of the contract action; FPDS reporting rules and data definitions govern the product/service code field and its required values. ³
• Use distinction: K-series PSCs (including K041) are intended for modification work (changes made to existing equipment), whereas J-series (for example, J041) covers maintenance/repair and N-series (for example, N041) covers installation; the PSC Manual groups these service families to support consistent reporting. ¹

Frequently asked questions

• Q: When is a requirement coded K041 instead of J041 or N041?
  A: Use K041 when the primary effort is a modification that changes form, fit, or function of existing refrigeration/HVAC equipment (for example, retrofits or system conversions). Routine repair is typically J041; new installations are N041. ¹

• Q: Does K041 determine the NAICS code used for small-business size standards?
  A: No. PSCs and NAICS serve different reporting functions; NAICS selection for a solicitation is based on the industry classification of the primary contractor activity and is reported separately in SAM/FPDS. Not specified by official sources for a direct automated crosswalk. ¹

• Q: Are environmental or refrigerant-specific compliance requirements captured by the PSC?
  A: No. PSCs classify the type of work; environmental or refrigerant compliance (for example, EPA rules on refrigerants) must be captured in the solicitation’s statement of work, specifications, and applicable contract clauses rather than by PSC alone. ¹

• Q: How should contracting officers report K041 in FPDS?
  A: Enter a valid PSC value from the PSC Manual in the FPDS product/service code field and follow FPDS data dictionary rules for product/service reporting. See FPDS guidance for field definitions and allowable values. ³

Useful resources

• G2X — PSC K041 overview
• Acquisition.gov — Product and Service Codes (PSC) Manual (landing page). ²
• FPDS — Glossary / Product or Service Code (FPDS data dictionary and help pages). ³

References

1. Acquisition.gov — Product and Service Codes (PSC) Manual (PSC Manual, April 2025 PDF). https://www.acquisition.gov/sites/default/files/manual/PSC%20Manual%20April%202025.pdf

2. Acquisition.gov — Business Zone / Product and Service Codes Manual landing. https://www.acquisition.gov/content/business-zone

3. FPDS.gov — Glossary / Product or Service Code (FPDS data dictionary and help pages). https://www.fpds.gov/help_V1_1/Glossary.htm