PSC codes › 4520
PSC 4520 — Space and Water Heating Equipment: federal contracts
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What PSC 4520 covers
Description: Space and Water Heating Equipment
Includes: Boilers, 15 pounds WSP and under (for boilers over 15 pounds WSP, see FSC 4410); Domestic Water Storage Tanks through 100 gallon capacity; Fireplace Heaters; Furnaces; Space Heaters; Heating Radiators; Immersion Heaters; Water Heaters, through 100 gallon recovery capacity (for heaters over 100 gallons recovery capacity, see FSC 4410).
Excludes: Vehicle Heaters (FSC 2540); Aircraft Heaters (FSC 1660).
Official definition: GSA PSC Manual (PSC April 2025.xlsx), acquisition.gov/psc-manual. Category: Facilities & Construction › Facility Related Materials.
Who is winning new PSC 4520 work
Contractors ranked by obligations on awards that started FY2024–FY2027 to date.
| Contractor | Obligations | Awards |
|---|---|---|
| WINDWARD ENTERPRISES, LLC | $9.6M | 215 |
| SIKORSKY AIRCRAFT CORPORATION | $6.5M | 568 |
| ARGO TURBOSERVE CORPORATION | $5.9M | 209 |
| HDT EXPEDITIONARY SYSTEMS INC | $5.3M | 1 |
| BONEAL, INCORPORATED | $3.7M | 2 |
| THE ELECTRIC HEATER CO | $3.5M | 34 |
| INTEGRATED PROCUREMENT TECHNOLOGIES | $2.6M | 35 |
| PIONEER INDUSTRIES, LLC | $2.4M | 94 |
| S I T CORPORATION | $2.2M | 64 |
| MCO SOLUTIONS, INC | $2.0M | 24 |
How competitive is PSC 4520?
- 77.5% of obligations on these awards were competed.
- 32.0% of competed awards that report offers drew a single offer (n=2,173).
- 69.9% went to small businesses.
- The five largest contractors hold 36.2% across 429 contractors.
NAICS codes used on PSC 4520 awards
| NAICS | Industry | Share |
|---|---|---|
| 333414 | Heating Equipment (Except Warm Air Furnaces) Manufacturing | 36.5% |
| 333415 | Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing | 21.1% |
| 336411 | Aircraft Manufacturing | 7.5% |
| 333310 | Commercial and Service Industry Machinery Manufacturing | 7.1% |
| 336413 | Other Aircraft Parts and Auxiliary Equipment Manufacturing | 5.2% |
| 332323 | Ornamental and Architectural Metal Work Manufacturing | 3.6% |
| 238220 | Plumbing, Heating, and Air-Conditioning Contractors | 2.4% |
| 236220 | Commercial and Institutional Building Construction | 1.8% |
Related PSC codes
5340 Hardware · 5330 Packing and Gasket Materials · 4820 Valves, Nonpowered · 4730 Hose, Pipe, Tube, Lubrication, and Railing Fittings · 6685 Pressure, Temperature, and Humidity Measuring and Controlling Instruments · 6110 Electrical Control Equipment · 6150 Miscellaneous Electric Power and Distribution Equipment · 4320 Power and Hand Pumps
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