PSC codes › Z1NB
PSC Z1NB — Maintenance of Heating and Cooling Plants: federal contracts
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What PSC Z1NB covers
Official definition: GSA PSC Manual (PSC April 2025.xlsx), acquisition.gov/psc-manual. Category: Facilities & Construction › Facility Related Services.
Who is winning new PSC Z1NB work
Contractors ranked by obligations on awards that started FY2024–FY2027 to date.
| Contractor | Obligations | Awards |
|---|---|---|
| SAW GREENLAND, LLC | $41.2M | 1 |
| SIGO VALIANT JV II LLC | $23.0M | 1 |
| PERFORMANCEEPC-GREENLAND JV LLC | $17.5M | 1 |
| QCM, INC. | $9.8M | 16 |
| MITCHELL BROTHERS INC | $9.0M | 1 |
| RWH CAPITAL LLC | $6.8M | 1 |
| CAPITOL UNITED SOLUTIONS INC | $6.0M | 7 |
| GOVERNMENT CONTRACTING RESOURCES, INC. | $5.9M | 2 |
| DTS P&L JV2 | $4.6M | 1 |
| COHO TECHNOLOGY SOLUTIONS, LLC | $3.3M | 2 |
How competitive is PSC Z1NB?
- 90.6% of obligations on these awards were competed.
- 32.1% of competed awards that report offers drew a single offer (n=137).
- 92.5% went to small businesses.
- The five largest contractors hold 65.1% across 134 contractors.
NAICS codes used on PSC Z1NB awards
| NAICS | Industry | Share |
|---|---|---|
| 236220 | Commercial and Institutional Building Construction | 63.7% |
| 561210 | Facilities Support Services | 16.1% |
| 238220 | Plumbing, Heating, and Air-Conditioning Contractors | 13.8% |
| 561320 | Temporary Help Services | 2.4% |
| 333415 | Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing | 1.3% |
| 811310 | Commercial and Industrial Machinery and Equipment (Except Automotive and Electronic) Repair and Maintenance | 0.5% |
| 334290 | Other Communications Equipment Manufacturing | 0.4% |
| 238210 | Electrical Contractors and Other Wiring Installation Contractors | 0.4% |
Related PSC codes
J041 Maint/Repair/Rebuild of Equipment: Refrigeration, Air Conditioning, and Air Circulating Equipment · Z1AA Maintenance of Office Buildings · Z2AA Repair or Alteration of Office Buildings · Z1JZ Maintenance of Miscellaneous Buildings · J045 Maint/Repair/Rebuild of Equipment: Plumbing, Heating, and Waste Disposal Equipment · Z2JZ Repair or Alteration of Miscellaneous Buildings · Z1AZ Maintenance of Other Administrative Facilities and Service Buildings · N041 Installation of Equipment: Refrigeration, Air Conditioning, and Air Circulating Equipment
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