NAICS 333414 Quarterly Industry Report
Heating Equipment (except Warm Air Furnaces) Manufacturing
Comprehensive industry research for valuation professionals, business owners, buyers, and lenders
NAICS Code: 333414Sector: 33Updated: Q1 2026
About This Report
This Fair Market Value industry report covers NAICS 333414 (Heating Equipment, except Warm Air Furnaces, Manufacturing) using the 2022 North American Industry Classification System. Data sources include the U.S. Census Bureau[5] NAICS classification, Bureau of Labor Statistics[6] manufacturing employment data, and SBA size standard tables. Content addresses industry structure, product scope, and market dynamics for establishments primarily engaged in manufacturing boilers, stoves, and other non-furnace heating equipment.
Industry Snapshot
Key metrics for the heating equipment (except warm air furnaces) manufacturing industry.
Industry Definition & Overview
Heating Equipment (except Warm Air Furnaces) Manufacturing (NAICS 333414) encompasses establishments primarily engaged in manufacturing non-electric heating equipment other than warm air furnaces. Products include low-pressure heating boilers, heating stoves, floor and wall furnaces, baseboard heating units, radiators, fireplace inserts, and hydronic heating components. Per the Census Bureau[5], this classification covers gas, oil, wood, and solar heating equipment designed for residential, commercial, and industrial space heating applications.
Manufacturing processes center on metal fabrication, welding, and assembly of combustion and heat transfer components. Boiler production requires ASME-certified pressure vessel fabrication with radiographic weld inspection. Stove and fireplace insert manufacturing involves cast iron foundry work or steel fabrication with refractory lining installation. Regulatory compliance drives product design, with UL safety listing, EPA emission standards for wood-burning appliances, and DOE energy efficiency requirements governing product certification. Workforce needs include certified welders, HVAC engineers, foundry workers, and quality control technicians.
Geographic distribution concentrates in regions with cold climate demand and established manufacturing infrastructure. Facilities cluster in the Northeast, Upper Midwest, and Mid-Atlantic states where heating equipment demand remains strong year-round. According to BLS data[6], manufacturing employment distributes across states with industrial capacity supporting metal fabrication and assembly operations. Raw material inputs include steel plate, cast iron, copper tubing, refractory materials, gas burner components, and electronic ignition and control systems.
What's Included in This Industry
- Low-pressure heating boilers for residential and commercial applications
- Heating stoves including wood, pellet, gas, and oil models
- Floor and wall furnaces (non-electric, non-warm-air)
- Baseboard heating units and fin-tube radiators
- Fireplace inserts and gas fireplace units
- Hydronic heating system components and manifolds
- Solar energy heating equipment and collectors
- Swimming pool heaters
- Sauna heaters and equipment
- Kerosene and portable fuel-burning space heaters
NAICS Classification Hierarchy
| Level | Description | Code |
|---|---|---|
| Subsector | Machinery Manufacturing | 333 |
| Industry Group | Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing | 3334 |
| NAICS Industry | Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing | 33341 |
| National Industry | Heating Equipment (except Warm Air Furnaces) Manufacturing | 333414 |
Related NAICS Codes
| Code | Description | Relationship |
|---|---|---|
| 333413 | Industrial and Commercial Fan and Blower and Air Purification Equipment Manufacturing | Manufactures industrial fans, blowers, and air purification equipment within the same HVAC industry group, sharing sheet metal fabrication capabilities and building equipment customer markets |
| 333415 | Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing | Produces warm air furnaces, air conditioning equipment, and commercial refrigeration systems, covering the warm air heating products explicitly excluded from NAICS 333414 classification |
| 332410 | Power Boiler and Heat Exchanger Manufacturing | Manufactures power boilers and heat exchangers for industrial and power generation applications, while NAICS 333414 covers low-pressure heating boilers for space heating purposes |
| 335220 | Major Household Appliance Manufacturing | Produces major household appliances including household cooking equipment, while NAICS 333414 covers heating stoves and fireplace units designed primarily for space heating applications |
| 333994 | Industrial Process Furnace and Oven Manufacturing | Manufactures industrial process furnaces and ovens for manufacturing applications, while NAICS 333414 covers heating equipment designed for building space heating rather than industrial processing |
| 332919 | Other Metal Valve and Pipe Fitting Manufacturing | Produces other metal valves and pipe fittings including gas valves and safety controls used as components in boilers, stoves, and heating equipment manufactured under NAICS 333414 |
Geographic Concentration
Top states by share of national establishments.
| # | State | % Est. | Total Est. |
|---|---|---|---|
| 1 | California | 12.1% | 42 |
| 2 | Pennsylvania | 7.8% | 27 |
| 3 | Minnesota | 5.2% | 18 |
| 4 | Ohio | 4.6% | 16 |
| 5 | Texas | 4.6% | 16 |
| 6 | New York | 4.3% | 15 |
| 7 | Massachusetts | 4.0% | 14 |
| 8 | North Carolina | 4.0% | 14 |
| 9 | Indiana | 4.0% | 14 |
| 10 | Illinois | 3.8% | 13 |
% Of Establishments
0%
12%
Source: County Business Patterns, U.S. Census Bureau[3]
SBA Lending Summary
24
Total SBA Loans
$21.2M
Total Loan Volume
$885K
Average Loan Size
15 yrs
Average Loan Term
10.25%
Average Interest Rate
168
Jobs Supported
Source: SBA 7(a) Program Data, U.S. Small Business Administration — FY 2025[4]
Key Insight: The Small Business Administration[7] sets the size standard for NAICS 333414 at 500 employees. Firms averaging 500 or fewer employees over the preceding 12 months qualify as small businesses for SBA loan programs, federal contracting set-asides, and small business certifications. This threshold applies to establishments where heating equipment production (excluding warm air furnaces) represents the primary business activity. Eligible businesses can access SBA 7(a) loans[8] for working capital, equipment, and acquisition financing, while 504 loans[9] support major fixed-asset purchases including real estate and heavy machinery.
Top SBA Lenders
| # | Lender | Loans | Volume | Avg Loan |
|---|---|---|---|---|
| 1 | OakStar Bank | 8 | $13.6M | $1.7M |
| 2 | United Bank of Union | 8 | $7.4M | $920K |
| 3 | Wells Fargo Bank National Association | 8 | $280K | $35K |
Frequently Asked Questions
Common questions about this industry.
What types of businesses are classified under NAICS 333414?
NAICS 333414 classifies establishments primarily engaged in manufacturing non-electric heating equipment including boilers, stoves, baseboard heaters, fireplace inserts, and hydronic heating components. The Census Bureau[5] distinguishes this from warm air furnaces (NAICS 333415), power boilers (NAICS 332410), and electric space heaters (NAICS 335220).
How is the heating equipment manufacturing industry structured?
Large manufacturers produce broad product lines of boilers, stoves, and heating systems distributed through plumbing and HVAC wholesale channels. Mid-size firms specialize in specific categories such as wood stoves, commercial boilers, or radiant heating panels. Smaller manufacturers build custom heating solutions, specialty components, and aftermarket parts for existing equipment installations.
What is the SBA size standard for heating equipment manufacturers?
The SBA sets the size standard at 500 employees for NAICS 333414. Firms at or below this threshold qualify as small businesses for federal contracting preferences and SBA lending programs. Details appear in the SBA size standards table[7].
What NAICS codes are closely related to heating equipment manufacturing?
NAICS 333413 covers fans and air purification in the same HVAC group. NAICS 333415 covers warm air furnaces and air conditioning. Regional 332410 covers industrial power boilers. NAICS 333994 covers industrial process furnaces. These adjacent codes reflect shared fabrication capabilities, thermal engineering expertise, and building equipment customer markets.
What industries depend on heating equipment manufacturers?
Residential and commercial construction markets purchase boilers, baseboard heaters, and fireplace units for new buildings. Facility managers buy replacement heating equipment for existing structures. Per BLS data[6], construction and building operations employment drives demand for heating equipment across cold-climate regions of the country.
What activities does NAICS 333414 include?
Covered products include heating boilers, stoves (wood, pellet, gas, oil), baseboard heaters, radiators, fireplace inserts, hydronic system components, solar heating collectors, pool heaters, and sauna equipment. Manufacturing activities span metal fabrication, pressure vessel welding, cast iron foundry work, and control system integration. Excluded items include warm air furnaces (NAICS 333415), power boilers (NAICS 332410), and electric space heaters (NAICS 335220).
Are heating equipment manufacturers eligible for SBA loans?
Yes, manufacturers meeting the 500-employee threshold qualify for SBA 7(a) loans, 504 loans, and federal contracting set-asides. The SBA funding programs[10] page details eligibility for manufacturing businesses seeking capital for foundry equipment, production facilities, and working capital.
Where is heating equipment manufacturing concentrated in the United States?
Facilities concentrate in the Northeast, Upper Midwest, and Mid-Atlantic regions where cold climate demand supports year-round heating equipment sales. Pennsylvania, New York, and Wisconsin host established heating equipment manufacturers. According to BLS employment data[6], manufacturing employment in these regions supports the metal fabrication and assembly operations required for boiler and stove production.
Sources & References
Government datasets and editorial sources used in this report.
- [1]U.S. Bureau of Labor Statistics, Quarterly Census of Employment and Wages bls.gov
- [2]U.S. Census Bureau, Economic Census census.gov
- [3]U.S. Census Bureau, County Business Patterns census.gov
- [4]U.S. Small Business Administration, SBA 7(a) Loan Program Data data.sba.gov
- [5]Census Bureau census.gov
- [6]BLS data bls.gov
- [7]Small Business Administration sba.gov
- [8]SBA 7(a) loans sba.gov
- [9]504 loans sba.gov
- [10]SBA funding programs sba.gov
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