Occupations · Installation, Maintenance, and Repair
Heating, Air Conditioning, and Refrigeration Mechanics and Installers
Install or repair heating, central air conditioning, HVAC, or refrigeration systems, including oil burners, hot-air furnaces, and heating stoves.
O*NET 30.3 Database (USDOL/ETA) · occupation code 49-9021.00
What it pays
A single “average salary” hides the spread. This is the whole distribution — the gap between the bottom and top bar is usually the number that matters.
BLS Occupational Employment and Wage Statistics, May 2024 · national, cross-industry · annual wage
Pay over time
Median up 70% between 2003 and 2024, before inflation. The band shows the 10th to 90th percentile.
BLS OEWS, one release per year. Before May 2011 only national estimates were published, so geography detail starts there.
Where the jobs are
| Metro area | Median wage | Employed |
|---|---|---|
| New York-Newark-Jersey City, NY-NJ-PA | $74,090 | 21,340 |
| Dallas-Fort Worth-Arlington, TX | $57,670 | 9,980 |
| Los Angeles-Long Beach-Anaheim, CA | $64,820 | 9,420 |
| Miami-Fort Lauderdale-West Palm Beach, FL | $53,510 | 9,200 |
| Philadelphia-Camden-Wilmington, PA-NJ-DE-MD | $62,830 | 8,290 |
| Phoenix-Mesa-Scottsdale, AZ | $58,820 | 7,920 |
| Washington-Arlington-Alexandria, DC-VA-MD-WV | $72,090 | 7,110 |
| Atlanta-Sandy Springs-Roswell, GA | $56,830 | 7,060 |
| Houston-The Woodlands-Sugar Land, TX | $57,910 | 7,000 |
| Chicago-Naperville-Elgin, IL-IN-WI | $74,400 | 6,140 |
| Boston-Cambridge-Newton, MA-NH | $77,600 | 5,760 |
| Detroit-Warren-Dearborn, MI | $61,140 | 5,750 |
BLS OEWS May 2024, metropolitan estimates · the 12 areas with the most people in this occupation
Typical education to enter: Postsecondary nondegree award · BLS Employment Projections 2024–34
What people in this job actually do
Ordered by how important the work is rated.
- Test electrical circuits or components for continuity, using electrical test equipment.
- Comply with all applicable standards, policies, or procedures, such as safety procedures or the maintenance of a clean work area.
- Study blueprints, design specifications, or manufacturers' recommendations to ascertain the configuration of heating or cooling equipment components and to ensure the proper installation of components.
- Discuss heating or cooling system malfunctions with users to isolate problems or to verify that repairs corrected malfunctions.
- Connect heating or air conditioning equipment to fuel, water, or refrigerant source to form complete circuit.
- Adjust system controls to settings recommended by manufacturer to balance system.
- Recommend, develop, or perform preventive or general maintenance procedures, such as cleaning, power-washing, or vacuuming equipment, oiling parts, or changing filters.
- Inspect and test systems to verify system compliance with plans and specifications or to detect and locate malfunctions.
- Repair or replace defective equipment, components, or wiring.
- Install or repair self-contained ground source heat pumps or hybrid ground or air source heat pumps to minimize carbon-based energy consumption and reduce carbon emissions.
- Install, connect, or adjust thermostats, humidistats, or timers.
- Install auxiliary components to heating or cooling equipment, such as expansion or discharge valves, air ducts, pipes, blowers, dampers, flues, or stokers.
O*NET 30.3 task ratings, importance scale
Skills that matter most
Importance, rated 1 to 5.
O*NET 30.3 skills, importance scale
Software and tools
A dot marks what O*NET flags as in demand.
O*NET 30.3 software skills · hot-technology flag
What this work is actually like
Conditions rated against the average across all occupations — only what makes this job different is listed.
O*NET 30.3 Job Zones
Working conditions that stand out
O*NET 30.3 work context, frequency scale · observed 2022-08
How people actually get in
Share of workers by the education they hold.
O*NET 30.2 education, training and experience · observed 2022-08
What kind of person the work suits
Occupational interest profile, rated 1 to 7.
O*NET 30.2 occupational interests (RIASEC)
What you take with you
Skills rated for how well they transfer into other occupations.
O*NET 30.3 transferable skills, importance scale
Knowledge the work draws on
Abilities it leans on
O*NET 30.3 abilities and knowledge, importance scale
How this job is advertised
The same work is posted under many titles — this is what to search for.
O*NET 30.3 job titles reported for this occupation
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What changed since 2015
Comparing O*NET release 20.1 (2015-10-01) with 30.3 (2026-05-01). Signs, not colour alone, carry the meaning. 1 entries that were only relabelled between releases are left out.
Now listed 14
No longer listed 3
Diff across the O*NET releases held here in full since October 2015, following occupations through merges and retirements. O*NET re-surveys occupations on a rolling cycle, so “no change” can also mean “not re-surveyed”.
Related jobs
O*NET 30.3 related occupations
Also called
O*NET 30.3 alternative titles
The same work in Europe
| ESCO occupation | ISCO | Match |
|---|---|---|
| heating, ventilation, air conditioning (and refrigeration) service engineer | 7127.1 | exact |
| heating, ventilation, air conditioning and refrigeration engineering technician | 3115.1.5 | close |
Official ESCO ↔ O*NET crosswalk (ESCO Secretariat with USDOL/ETA)
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