Boilermaker vs boiler technician: despite the shared word, they are two different trades.
Federal data counts them as separate occupations — Boilermakers (SOC 47-2011), and the Heating, Air Conditioning, and Refrigeration Mechanics and Installers category (SOC 49-9021) that boiler technicians sit inside.
The boilermaker footprint is construction and utilities; the boiler technician's is service and repair of installed boilers.
Here is how the work, training, pay, and outlook compare.
What do boilermakers build?
Boilermakers are their own federal occupation, SOC 47-2011 — and a small one.
BLS counted 10,190 wage-and-salary jobs nationally in May 2025, a figure that excludes the self-employed.
The industries employing the most boilermakers are utility system construction (2,130 jobs), building equipment contractors (1,830), and nonresidential building construction (1,630) — a construction-and-utilities footprint.
The geography says the same thing.
The states with the most boilermaker jobs are Texas (2,340), Louisiana (1,220), California (720), New York (410), and Florida (400), and the largest metro counts are Houston-Pasadena-The Woodlands (1,170), Baton Rouge (680), New York-Newark-Jersey City (330), Los Angeles-Long Beach-Anaheim (320), and Beaumont-Port Arthur (230).
Among the trade's highest-paying industries by annual median are petroleum and coal products manufacturing ($107,800) and a narrow slice of chemical manufacturing ($99,800) — small niches, not typical jobs.
One honest limit: our research carries the federal counts, not a task-level duty list for the trade, so we won't invent one — ask the contractors and apprenticeship programs doing the work what a normal week looks like.
The same goes for the union question: our research has no verified union membership figure for boilermakers, so we won't state one.
What the counts do establish is where the trade lives: construction and utility work.
If you are weighing boilermaker work against a pipefitter career, our pipefitter vs boilermaker comparison covers that head-to-head.
What do boiler technicians service?
A boiler technician works the other side of the same equipment: boilers that are already installed and running.
The job is installing, servicing, and repairing steam and hot-water (hydronic) systems — burners and controls, safety devices, circulator pumps, zone valves, and radiators, and on steam systems the water line, vents, and condensate returns — in homes, apartment buildings, and commercial buildings.
Employers file the role under several names: boiler service technician, boiler maintenance technician, and boiler mechanic among them.
Our boiler technician guide covers the systems and the job titles in full.
Scale is the first contrast: the HVACR category boiler technicians sit inside counted 409,670 wage-and-salary jobs in May 2025, against 10,190 for the boilermaker category.
The employer lists overlap at the top — building equipment contractors employed 305,330 HVACR workers and 1,830 boilermakers — then split: the next-largest HVACR industries are durable-goods merchant wholesalers in selected BLS categories (12,190) and fuel dealers (8,480), while the boilermaker list continues with utility system construction (2,130) and nonresidential building construction (1,630).
A boiler technician is dispatched to an already-running system.
If you're set on the boiler service side, openings post alongside the HVAC and plumbing roles on our boiler technician jobs page.
Training routes compared
The two trades train differently, and our evidence is much stronger on the boiler technician side.
The routes our boiler technician guides document run through the HVAC and plumbing trades rather than a boiler-only school: helper or apprentice roles with a heating service company, HVAC training programs, or time as an HVAC technician before specializing into hydronic and steam service.
On the oil-fired side, the National Oilheat Research Alliance runs a three-level technician certification: Bronze, Silver, and Gold.
Our boiler technician training guide walks through the routes step by step.
For boilermakers, our research carries the federal wage and outlook counts — not the trade's training pipeline — so we can't put verified hour totals or apprenticeship lengths on this page, and we won't borrow numbers from other trades.
If you are serious about the boilermaker route, ask the trade's own apprenticeship sponsors and the contractors hiring in the metros listed above what entry actually requires.
Boiler rules are set locally — confirm before you plan
Which is right for you?
On pay, the federal medians favor the boilermaker category: $36.74/hour ($76,410/year) in May 2025, against $29.33/hour ($61,010/year) for the HVACR category boiler technicians sit inside.
Both figures come from the same BLS OEWS release, and both are category medians — read the comparison as category against category, not as the two jobs quoted head-to-head.
There is one caveat in the boiler technician's direction: our sources carry no boiler-technician-only wage, so $61,010 is the broader heating-and-cooling occupation, not a boiler-only number.
The boilermaker spread runs from $50,490 at the 10th percentile to $110,370 at the 90th.
On opportunity, the numbers reverse.
BLS projects the boilermaker category to shrink 1.8% from 2025 to 2035, with about 700 openings a year on average, against 10.9% growth and about 40,600 openings a year for the HVACR category — with 3.5% the average for all occupations.
Geography matters too: the states with the most boilermaker jobs are Texas, Louisiana, and California, while the residential boiler base sits elsewhere — EIA's 2020 RECS counts 9.29 million U.S. homes heated mainly by a steam or hot-water system, and 6.01 million of them (65%) are in the Northeast.
Pick the trade whose map matches yours.
And note what the numbers are: OEWS category estimates that exclude overtime pay, shift differentials, and non-production bonuses, counted on a 2,080-hour year.
They are not offers.
If the construction-and-utilities footprint appeals and you are near the metros listed above, the boilermaker trade is the higher-median, smaller, shrinking category.
If you would rather run service calls on installed boilers inside a growing occupation, the boiler technician route is the Northeast-centered path — and the one our guides document in more depth; our boiler technician salary page holds the full federal pay tables.
Career information, not legal or financial advice. Pay figures are BLS category estimates for May 2025 and change with the next release; confirm entry requirements with the apprenticeship programs, contractors, and licensing bodies where you would work.