Sheet metal workers and HVAC technicians both work on HVAC systems: one fabricates and installs the ductwork, the other installs, services and repairs the heating, cooling and refrigeration equipment.
On pay, the HVAC vs sheet metal question is nearly a tie — $61,010 against $61,800 median in May 2025.
On outlook it is not: 10.9% projected growth against 2.5% over 2025–35.
Here is how the two trades actually differ, and how to pick.
Who does what on an HVAC job: ducts vs equipment
The two trades' O*NET definitions draw the line between them.
O*NET defines Sheet Metal Workers (SOC 47-2211.00) as workers who fabricate, assemble, install, and repair sheet metal products and equipment such as ducts, control boxes, drainpipes, and furnace casings — and the code explicitly includes sheet metal duct installers who install prefabricated sheet metal duct.
O*NET defines the HVAC side, Heating, Air Conditioning, and Refrigeration Mechanics and Installers (SOC 49-9021.00), as workers who install or repair heating, central air conditioning, HVAC, or refrigeration systems, including oil burners, hot-air furnaces, and heating stoves.
On HVAC work, then, the two definitions differ in kind: the sheet metal list is a product list — ducts, control boxes, furnace casings — while the HVACR definition names the systems: heating, central air conditioning, HVAC, or refrigeration.
The HVACR duty list BLS publishes runs from installing, maintaining and repairing HVACR systems to installing electrical components and wiring, inspecting and testing systems, and discussing malfunctions with customers — and O*NET rates that customer-facing troubleshooting task, discussing heating or cooling system malfunctions with users to isolate problems, as the trade's highest-importance core task (importance 85), ahead of testing electrical circuits or components for continuity (83) and repairing or replacing defective equipment, components, or wiring (81).
The service tasks on that list are also the piece of the HVACR job the sheet metal definition doesn't contain.
O*NET's sample job titles for the HVACR occupation include AC Mechanic, AC Tech, HVAC Control Tech, HVAC Installer, and HVAC Mechanic, and BLS notes that some technicians focus on areas such as radiant heating systems, testing and balancing, or commercial refrigeration, while others specialize either in installation or in repair and maintenance.
If you want the equipment-and-diagnostics side of the trade, our HVAC technician guide covers the role in depth; if the duct side sounds like you, the sheet metal worker guide is its counterpart, and our duct installer guide covers the duct-installation role on the HVAC side.
The industries employing each category: For HVACR mechanics and installers, the list is led by Building Equipment Contractors with 305,330 jobs, followed by merchant wholesalers of durable goods (12,190) and fuel dealers (8,480).
For sheet metal workers it is Building Equipment Contractors again (53,690), but second place is Fabricated Metal Product Manufacturing (20,780) and third is Foundation, Structure, and Building Exterior Contractors (16,060) — a trade whose definition covers both fabricating and installing, which is exactly the shop-versus-field question the next section takes up.
Union structure: SMART vs UA
Sheet metal's union-side training body is the International Training Institute (ITI), jointly sponsored by SMART and SMACNA, the contractors' association; ITI reports more than 14,000 registered apprentices in the US and Canada.
ITI describes sheet metal apprenticeships as four- or five-year programs combining on-the-job training and classes, with little to no tuition.
On the HVAC side, the United Association (UA) lists HVACR service technicians among its trades and says it represents approximately 409,000 plumbers, pipefitters, sprinkler fitters, HVACR service technicians, welders, and related trades in North America.
The UA says its apprenticeships are registered with the Department of Labor, typically last five years, and cover plumbing, pipefitting, HVACR, welding and fire protection.
For a reader comparing the two, the practical difference starts with where you apply and what you train for: our union sheet metal worker guide explains how SMART locals work, and our union HVAC pay guide covers union pay and benefits.
Shop vs field work
The sheet metal trade's definition carries both kinds of verbs: fabricate and assemble describe making the product; install and repair describe putting it in place and fixing it.
Where each happens — shop or job site — is the shop-versus-field question, and the definition names the activities, not the places.
The HVACR definition names installing and repairing systems, and its employer list is led by contractors rather than manufacturers.
The weekly-hours surveys give one like-for-like comparison.
In O*NET survey data, 17% of HVACR mechanics report a typical week of more than 40 hours and 83% report 40 hours; for sheet metal workers it is 28% and 72% — so sheet metal workers report somewhat longer weeks, not shorter ones.
Field conditions bite on the HVAC side.
In O*NET survey data, 58% of HVACR mechanics report working outdoors in all weather every day, 34% report very hot (above 90 F) or very cold (below 32 F) temperatures every day, and 68% report exposure to contaminants such as pollutants, gases, dust and odors every day.
Our vault carries no like-for-like O*NET environment distribution for sheet metal workers, so we won't guess at one.
The injury counts put the equipment trade higher.
In 2023-2024 (annualized), HVACR mechanics and installers had 214.5 private-industry injury/illness cases involving days away from work per 10,000 full-time workers, about 2.5 times the all-occupation rate of 86.6; sheet metal workers had 162.7 cases per 10,000, with falls to a lower level alone at 59.0 per 10,000.
Both are BLS rates for broad categories, not for one employer or one job.
Pay and path compared
Same series, same statistic: BLS's OEWS May 2025 annual wage percentiles for the two categories, released May 15, 2026.
| Annual wage (OEWS May 2025) | HVACR mechanics and installers (SOC 49-9021) | Sheet metal workers (SOC 47-2211) |
|---|---|---|
| 10th percentile | $40,050 | $38,630 |
| 25th percentile | $48,360 | $47,830 |
| Median | $61,010 | $61,800 |
| 75th percentile | $77,060 | $81,610 |
| 90th percentile | $95,210 | $105,650 |
The medians — $61,800 for sheet metal workers, $61,010 for the HVACR category — are a near-tie, with sheet metal a hair ahead.
The shape of each distribution differs more than its middle: the HVACR category is higher at the bottom ($40,050 against $38,630 at the 10th percentile), while sheet metal pulls ahead at the top ($81,610 against $77,060 at the 75th, and $105,650 against $95,210 at the 90th).
The mean (average) wage — a different statistic, pulled up by the highest earners — was $64,780 for the HVACR category and $67,850 for sheet metal workers in the same release.
Know what OEWS measures before you quote any of these numbers: it excludes the self-employed, excludes overtime pay, shift differentials and nonproduction bonuses such as sign-on and holiday pay, and includes commissions, production bonuses, incentive pay and tips; its annual figures assume a 2,080-hour year.
The full state tables live on our HVAC technician salary and sheet metal worker salary pages.
The outlook is where the trades separate.
BLS's Employment Projections put HVACR mechanics and installers at 10.9% growth from 2025 to 2035 (440.9k to 489.1k jobs including the self-employed) with about 40,600 openings a year on average; sheet metal workers are projected at 2.5% (131.1k to 134.4k) with about 9,800 openings a year.
The average for all occupations is 3.5%, so HVAC is well above it and sheet metal below.
The categories are also different sizes: 409,670 and 119,770 wage-and-salary jobs respectively in May 2025.
Geography moves both numbers.
The states with the most HVACR jobs are Florida (39,160), California (35,130), Texas (34,730), New York (24,430) and Pennsylvania (15,880); for sheet metal workers they are Texas (9,540), California (8,390), Florida (8,040), New York (6,570) and Indiana (4,580).
The metro lists lead with New York-Newark-Jersey City on both sides (21,820 HVACR jobs, 6,080 sheet metal jobs), with Dallas-Fort Worth-Arlington second for both (10,910 and 2,890).
The highest-paying metros differ: for the HVACR category they are Fairbanks-College, AK ($93,820), Anchorage, AK ($85,620), Napa, CA ($84,570), San Jose-Sunnyvale-Santa Clara, CA ($82,050) and Seattle-Tacoma-Bellevue, WA ($80,100); for sheet metal workers, Seattle-Tacoma-Bellevue tops the list at $109,830, followed by San Jose-Sunnyvale-Santa Clara ($109,280), San Francisco-Oakland-Fremont ($102,660), Olympia-Lacey-Tumwater, WA ($100,650) and Atlantic City-Hammonton, NJ ($100,470).
The highest-paying industries inside each category are small niches, not typical jobs: for HVACR mechanics, Computer Systems Design and Related Services ($115,910 median), Scheduled Air Transportation ($114,080) and Natural Gas Distribution ($105,630); for sheet metal workers, General Medical and Surgical Hospitals ($104,780), Local Government excluding Schools and Hospitals ($102,150) and Scientific Research and Development Services ($100,280).
On the path in: O*NET places HVACR mechanics in Job Zone Three ("Medium Preparation Needed") — most occupations in that zone require vocational training, related on-the-job experience, or an associate's degree.
The union routes are the ITI's four- or five-year sheet metal apprenticeships and the UA's registered apprenticeships, typically five years; the routes in full are in each trade's how-to-become guide.
One federal requirement is activity-specific, not trade-specific: under 40 CFR 82.161, any person who could reasonably be expected to violate the integrity of a refrigerant circuit while maintaining, servicing, repairing or disposing of appliances containing CFC/HCFC or non-exempt substitute refrigerants (such as HFCs) must pass an exam from an EPA-approved technician certification program.
Category medians are not offers — and requirements stack
Switching between them
On employers, the federal data shows one overlap: Building Equipment Contractors — NAICS 2382, a group that also includes electrical contractors — is the largest employing industry group for both SOC codes, with 305,330 HVACR jobs and 53,690 sheet metal jobs in May 2025.
What we cannot tell you is how the door swings.
Our research found no verified figure for how often workers move from sheet metal work into HVAC service or the reverse, and no national rule for how much credit a SMART apprenticeship year earns inside a UA program or the other way round — ask the specific program you would apply to before assuming any credit.
What the definitions do suggest is which skills sit on which side of the line: the sheet metal definition centers on making, installing and repairing sheet metal products, while the equipment trade's duty list adds electrical work and customer-facing troubleshooting — the task O*NET rates highest.
Plan for the EPA 608 exam from the last section if your work on the equipment side will touch refrigerant circuits.
If you are deciding rather than switching, read both routes: our how to become a sheet metal worker guide and our how to become an HVAC technician guide cover the entry routes for each trade.
Career information, not legal advice. Pay and outlook figures are BLS's May 2025 and 2025–35 estimates for broad occupational categories and change with each release; certification requirements come from EPA regulations, and licensing is set by states and sometimes cities or counties — confirm current requirements with the EPA-approved program, your state licensing board, or the city/county where licensing is local.