The following Product Service Codes (PSCs) are commonly associated with NAICS 221330, Steam and Air-Conditioning Supply

PSC 4130 Refrigeration and Air Conditioning Components

Top Result Products
Federal Category 4.3: Facilities & Construction Facility Related Materials

Includes
Heat Exchanger Equipment; Refrigerant Strainers; Refrigeration Compressors; Air Conditioning and Refrigeration Servicing Equipment, such as Charging and Testing Manifolds, Lines and Units; Operating Components of Refrigeration and Air Conditioning Equipment, Plants, and Systems classified in classes 4110 and 4120.

Excludes
Refrigeration and Air Conditioning Plants (see classes 4110 and 4120): Collections of Refrigeration Components "packaged" as a unit including a refrigeration compressor, condenser, evaporator, etc., specifically designed and tailored for applications such as walk-in type refrigerators. Individual components of the "packaged" unit will be classified in class 4130, or as otherwise specifically prescribed by the indexes and structure of the FSC. The complete "package" unit will be classified in class 4110.

Possible NAICS Codes
333415 – Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing
333618 – Other Engine Equipment Manufacturing
332112 – Nonferrous Forging
238220 – Plumbing, Heating, and Air-Conditioning Contractors
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing
333120 – Construction Machinery Manufacturing
423740 – Refrigeration Equipment and Supplies Merchant Wholesalers
333413 – Industrial and Commercial Fan and Blower and Air Purification Equipment Manufacturing
221330 – Steam and Air-Conditioning Supply
336211 – Motor Vehicle Body Manufacturing

PSC 4120 Air Conditioning Equipment

Products
Federal Category 4.3: Facilities & Construction Facility Related Materials

Includes
Store Type Units; Window and Room Type Units; Marine, and Vehicular Air Conditioning Units; Air Conditioning Plants and Systems.

Excludes
Air Conditioning Components (FSC 4130, or as otherwise specifically prescribed by the indexes and structure of the FSC).

Notes
This class includes only complete air conditioning equipment, systems, and plants. Also included are specially designed nonoperating accessories such as a window panel used with a window type air conditioning unit to facilitate mounting. Excluded from this class are operating components, assemblies, parts, attachments, or accessories for use in or on air conditioning equipment, which are to be classified in FSC 4130, or as otherwise specifically prescribed by the indexes and structure of the FSC.

Possible NAICS Codes
333415 – Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing
238220 – Plumbing, Heating, and Air-Conditioning Contractors
423730 – Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers
423710 – Hardware Merchant Wholesalers
335220 – Major Household Appliance Manufacturing
444140 – Hardware Retailers
334290 – Other Communications Equipment Manufacturing
333413 – Industrial and Commercial Fan and Blower and Air Purification Equipment Manufacturing
221330 – Steam and Air-Conditioning Supply
334512 – Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use

PSC 4730 Hose, Pipe, Tube, Lubrication, and Railing Fittings

Products
Federal Category 5.1: Industrial Products & Services Machinery & Components

Includes
Adapters; Bends; Caps; Clamps; Connectors; Couplings; Crosses; Elbows; Expansion Joints; Ferrules; Flanges; Laterals; Lubrication Fittings; Manifolds; Nipples; Nozzles; Outlets; Plugs; Reducers; Swing and Swivel Joints; Tees; Traps; Unions; Wyes.

Excludes
Air Conditioning-Heating Fittings (FSC 4520); Bituminized Fiber and Concrete Fittings (FSC 5630); Conduit Boxes and Fittings (FSC 5975); Downspout Fittings (FSC 5670); Medical and Surgical Fittings (FSC 6515); Laboratory Fittings (FSC 6640); Post Caps and Rail Ends (FSC 5660); Machine Thread Bushings and Plugs (FSC 5365).

Possible NAICS Codes
332996 – Fabricated Pipe and Pipe Fitting Manufacturing
332919 – Other Metal Valve and Pipe Fitting Manufacturing
326122 – Plastics Pipe and Pipe Fitting Manufacturing
333618 – Other Engine Equipment Manufacturing
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
333914 – Measuring, Dispensing, and Other Pumping Equipment Manufacturing
332912 – Fluid Power Valve and Hose Fitting Manufacturing
333120 – Construction Machinery Manufacturing

PSC 4520 Space and Water Heating Equipment

Products
Federal Category 4.3: Facilities & Construction Facility Related Materials

PSC 4140 Fans, Air Circulators, and Blower Equipment

Products
Federal Category 4.3: Facilities & Construction Facility Related Materials

Includes
Wall Type Fans; Pedestal Type Fans; Household Type and Attic Type Exhaust Fans; Floor Fans; Forced Draft Exhaust and Disposal Kits; Fans; Air Circulators, and Blower Equipment, whether designated as "industrial" or "nonindustrial" by application and/or use.

Excludes
Combination Heater-Fans (see FSC 4520).

Notes
Fans and impellers which are specifically designed for use with specific individual types of equipment are to be classified in the same classes as their next higher assemblies or in the appropriate components or accessories classes (as in group 25 or 29 or class 1680) as prescribed by the indexes and structure of the FSC.

Possible NAICS Codes
333413 – Industrial and Commercial Fan and Blower and Air Purification Equipment Manufacturing
333414 – Heating Equipment (except Warm Air Furnaces) Manufacturing
333415 – Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
444140 – Hardware Retailers
238220 – Plumbing, Heating, and Air-Conditioning Contractors
333120 – Construction Machinery Manufacturing
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing
333618 – Other Engine Equipment Manufacturing
423710 – Hardware Merchant Wholesalers