333414 — Heating Equipment (except Warm Air Furnaces) Manufacturing
Description
This U.S. industry comprises establishments primarily engaged in manufacturing heating equipment (except electric and warm air furnaces), such as heating boilers, heating stoves, floor and wall furnaces, and wall and baseboard heating units (as defined in the official U.S. Census Bureau 2022 NAICS Manual).
Exclusions & Cross-References
- Manufacturing warm air furnaces--are classified in U.S. Industry 333415, Air-Conditioning and Warm Air
- Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing;
- Manufacturing electric space heaters--are classified in Industry 335210, Small Electrical Appliance
- Manufacturing;
- MANUFACTURING 251
- Manufacturing household-type cooking stoves and ranges--are classified in Industry 335220, Major
- Household Appliance Manufacturing;
- Manufacturing industrial, power, and marine boilers--are classified in Industry 332410, Power Boiler and
- Heat Exchanger Manufacturing;
- Manufacturing industrial process furnaces and ovens--are classified in U.S. Industry 333994, Industrial
- Process Furnace and Oven Manufacturing; and
- Manufacturing commercial-type cooking equipment--are classified in Industry 333310, Commercial and
Overview Facts
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 2499 - Wood Products, NEC (via SIC1987:2499→NAICS1997:333414→2002:333414→2007:333414→2012:333414→2017:333414→2022:333414)
- SIC 3433 - Heating Equipment, Except Electric and Warm Air Furnaces (via SIC1987:3433→NAICS1997:333414→2002:333414→2007:333414→2012:333414→2017:333414→2022:333414)
- SIC 3443 - Fabricated Plate Work (via SIC1987:3443→NAICS1997:333414→2002:333414→2007:333414→2012:333414→2017:333414→2022:333414)
- SIC 3444 - Sheet Metal Work (via SIC1987:3444→NAICS1997:333414→2002:333414→2007:333414→2012:333414→2017:333414→2022:333414)
- SIC 3569 - General Industrial Machinery and Equipment, NEC (via SIC1987:3569→NAICS1997:333414→2002:333414→2007:333414→2012:333414→2017:333414→2022:333414)
- SIC 3634 - Electric Housewares and Fans (via SIC1987:3634→NAICS1997:333414→2002:333414→2007:333414→2012:333414→2017:333414→2022:333414)
Suggested Product Service Codes (Advisory)
The following Product Service Codes (PSCs) are advisory suggestions aligned with this NAICS code. Note: NAICS and PSC codes map to different dimensions of procurement (industry vs. product/service). There is no official binding 1:1 crosswalk.
- PSC 4520 — Space and Water Heating Equipment
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 333414 valid in 2022? ▾
Yes, 333414 is a valid 6-digit 2022 NAICS national industry code representing 'Heating Equipment (except Warm Air Furnaces) Manufacturing' under Sector 31-33 in the official classification index.
What is the SBA size standard for NAICS code 333414? ▾
The Small Business Administration (SBA) has established a small business size standard of 500 employees for NAICS code 333414 (Heating Equipment (except Warm Air Furnaces) Manufacturing), calculated based on employees.
What is the legacy SIC equivalent for NAICS 333414? ▾
According to official Census Bureau concordance tables, NAICS code 333414 (Heating Equipment (except Warm Air Furnaces) Manufacturing) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 2499 - Wood Products, NEC, 3433 - Heating Equipment, Except Electric and Warm Air Furnaces, 3443 - Fabricated Plate Work, 3444 - Sheet Metal Work, 3569 - General Industrial Machinery and Equipment, NEC, 3634 - Electric Housewares and Fans.
Related Pages & Tools
Further regulatory reference links for NAICS code 333414:
- Sector 31-33 Directory Hub — List of related industries in the Manufacturing sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- NAICS 333414 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (Heating Equipment (except Warm Air Furnaces) Manufacturing).
- SBA Size Standards Guide — Complete rules and averaging periods for small business classifications.
- Calculating Annual Receipts Guide — Detailed worked example of revenue calculation rules.
- IRS Principal Business Activity Guide — How NAICS codes map to corporate and entity tax filings.