Skills it runs on
The capabilities O*NET rates most important for this occupation — the human ground the work is built on.
See all skills →Heating, Air Conditioning, and Refrigeration Mechanics and Installers
Occupation · SOC 49-9021.00
Install or repair heating, central air conditioning, HVAC, or refrigeration systems, including oil burners, hot-air furnaces, and heating stoves.
Also called: HVAC Mechanic (Heating, Ventilation, and Air Conditioning Mechanic) · Refrigeration Mechanic · Refrigeration Technician (Refrigeration Tech) · Service Technician (Service Tech) · A/C Tech (Air Conditioning Technician) · HVAC Installer (Heating, Ventilation, and Air Conditioning Installer) · HVAC Service Tech (Heating, Ventilation, and Air Conditioning Service Technician) · HVAC Specialist (Heating, Ventilation, and Air Conditioning Specialist) · HVAC Tech (Heating, Ventilation, and Air Conditioning Technician) · Refrigeration Operator · A/C Installer-Servicer (Air Conditioning Installer-Servicer) · A/C Mechanic (Air Conditioner Mechanic)
Job family: Installation, Maintenance, and Repair Occupations
Take this to your AI
A source-stamped Markdown brief of this occupation — paste it into an agent, or fetch
/roles/role-49-9021-00/context.md directly.
AI work map
A fast read on where AI already shows up in this occupation, where it stays a copilot, where humans remain in the loop, and what the labor market is doing. Built from observed Claude.ai conversations mapped to O*NET tasks and from published research — measures of usage and exposure, not advice or predictions that the job is going away.
Market signal
Independent published positions, read together — not a forecast.
- Growing fast employment outlook (+8.1% by 2034)
- 40,100 openings/yr
- Moderate AI exposure
- Median pay $59,810/yr
- Work is mostly on-site (not teleworkable)
- 2013 flagged this for computerization (55th); today's AI task-overlap is comparatively low (25th)
25th-percentile task overlap — yet about 40,100 openings a year (+8.1% projected, BLS) . What exposure means →
AI & job outlook
What today's research says about this occupation's exposure to AI, how AI is actually being used in it, and where employment is headed. These are positions within published studies — measures of exposure and usage, not predictions that this job will disappear.
Exposure to current AI
Each study uses its own scale, so the raw scores are not comparable across rows — the percentile (this job's rank among all U.S. occupations with data) is the comparable figure, and sizes the bars.
| Measure | Rank vs all occupations | Percentile | Score |
|---|---|---|---|
| Overall AI exposure (Felten et al.) Low | 24th | -0.8 | |
| LLM task exposure, γ (OpenAI / Eloundou) Low | 19th | 0.1 | |
| AI assistant applicability (Microsoft) Moderate | 37th | 0.1 |
OpenAI's exposure study scores tasks three ways: with a language model alone (α 0.1), with simple added tooling (β 0.1), and including AI-powered software (γ 0.1). Higher means more of the job's tasks could be done at least twice as fast — not that they will be automated away.
This job mostly cannot be done remotely (Dingel–Neiman) — its hands-on tasks sit outside what software-based AI reaches.
Historical automation estimate (2013)
A pre-LLM (2013) estimate of how automatable this job is by computerization and robotics. Shown for historical context only — it is not part of any current AI ranking.
Frey–Osborne probability 0.7 · 55th percentile among occupations · Moderate
How AI is actually used in this job
Among measured AI assistant conversations mapped to this occupation (Anthropic Economic Index, 2026-01-15), these task types came up most. These are shares of observed AI conversations — not shares of the job, of worker time, or of what could be automated.
| 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. | 0.5% |
Job outlook
Independent U.S. Bureau of Labor Statistics employment projection for 2024–2034 — a labor-market forecast, not an AI-impact forecast.
| Outlook | Growing fast · +8.1% by 2034 |
| Projected annual openings | 40,100 |
| Employment 2024 → 2034 | 425,200 → 459,700 |
“Annual openings” counts new jobs plus replacements for workers who leave the occupation, so it can be large even when growth is modest.
Where this work sits on the global GenAI gradient
The ILO's 2025 global study scores generative-AI exposure on the international ISCO-08 occupation system, not US SOC. Bridged through the published (and approximate, many-to-many) IBS O*NET-SOC ↔ ISCO-08 crosswalk, this US occupation corresponds to the international occupation below. Exposure here means how much of the work's tasks today's AI can attempt — task overlap, not automation, adoption, or jobs lost.
Heating, Air Conditioning, and Refrigeration Mechanics and Installers sits at the 36th percentile of 427
occupations on the global GenAI task-exposure gradient
— exposure rose from 2023 to 2025. Each dot is one occupation; the
ringed one is this work. Exposure is task overlap, not automation or jobs lost.
21% mean task exposure (2025)
36th percentile of 427 placed occupations
+3 pts shift 2023 → 2025
| International occupation (ISCO-08) | Task exposure (2025) | Most tasks fall in |
|---|---|---|
| Air Conditioning and Refrigeration Mechanics · 7127 | 21% | Not exposed |
Read the whole six-band gradient on the GenAI exposure gradient page. The crosswalk is approximate: a US occupation can map to several international ones, and the ILO scores describe the international occupation, not this exact US role.
Tasks
All 30 tasks O*NET lists for this occupation, ordered by importance. Each links to its own page with AI-exposure and observed-use detail.
- Test electrical circuits or components for continuity, using electrical test equipment. Core · importance 4.6
- Comply with all applicable standards, policies, or procedures, such as safety procedures or the maintenance of a clean work area. Core · importance 4.5
- 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. Core · importance 4.4
- Discuss heating or cooling system malfunctions with users to isolate problems or to verify that repairs corrected malfunctions. Core · importance 4.4
- Connect heating or air conditioning equipment to fuel, water, or refrigerant source to form complete circuit. Core · importance 4.3
- Adjust system controls to settings recommended by manufacturer to balance system. Core · importance 4.3
- Recommend, develop, or perform preventive or general maintenance procedures, such as cleaning, power-washing, or vacuuming equipment, oiling parts, or changing filters. Core · importance 4.2
- Inspect and test systems to verify system compliance with plans and specifications or to detect and locate malfunctions. Core · importance 4.2
- Repair or replace defective equipment, components, or wiring. Core · importance 4.2
- 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. Core · importance 4.2
- Install, connect, or adjust thermostats, humidistats, or timers. Core · importance 4.1
- Install auxiliary components to heating or cooling equipment, such as expansion or discharge valves, air ducts, pipes, blowers, dampers, flues, or stokers. Core · importance 4.1
- Braze or solder parts to repair defective joints and leaks. Core · importance 4.1
- Lay out and connect electrical wiring between controls and equipment, according to wiring diagrams, using electrician's hand tools. Core · importance 4.0
- Perform mechanical overhauls and refrigerant reclaiming. Core · importance 4.0
- Install expansion and control valves, using acetylene torches and wrenches. Core · importance 4.0
- Measure, cut, thread, or bend pipe or tubing, using pipe fitter's tools. Core · importance 3.9
- Mount compressor, condenser, and other components in specified locations on frames, using hand tools and acetylene welding equipment. Core · importance 3.9
- Install dehumidifiers or related equipment for spaces that require cool, dry air to operate efficiently, such as computer rooms. Core · importance 3.9
- Record and report time, materials, faults, deficiencies, or other unusual occurrences on work orders. Core · importance 3.9
- Keep records of repairs and replacements made and causes of malfunctions. Core · importance 3.8
- Cut or drill holes in floors, walls, or roof to install equipment, using power saws or drills. Core · importance 3.8
- Estimate, order, pick up, deliver, and install materials and supplies needed to maintain equipment in good working condition. Core · importance 3.8
- Schedule work with customers and initiate work orders, house requisitions, and orders from stock. Core · importance 3.7
- Supervise and instruct assistants. Core · importance 3.6
- Lay out reference points for installation of structural and functional components, using measuring instruments. Core · importance 3.5
- Lift and align components into position, using hoist or block and tackle. Core · importance 3.5
- Install or repair air purification systems, such as specialized filters or ultraviolet (UV) light purification systems. Supplemental · importance 3.3
- Repair or service heating, ventilating, and air conditioning (HVAC) systems to improve efficiency, such as by changing filters, cleaning ducts, and refilling non-toxic refrigerants.
- Test pipes, lines, components, and connections for leaks.
Work activities
- Test electrical circuits or components for proper functioning.
- Service heating, ventilation or air-conditioning (HVAC) systems or components.
- Replace worn, damaged, or defective mechanical parts.
- Repair worn, damaged, or defective mechanical parts.
- Confer with customers or users to assess problems.
- Install heating, ventilation, or air conditioning (HVAC) equipment.
- Adjust equipment to ensure optimal performance.
- Determine operational compliance with regulations or standards.
- Interpret blueprints, specifications, or diagrams to inform installation, development or operation activities.
- Braze metal parts or components.
- Connect electrical components or equipment.
- Inspect systems to determine if they are operating properly.
- Document operational activities.
- Install machine or equipment replacement parts.
- Install energy-efficient heating, ventilation, or air conditioning (HVAC) equipment.
- Advise others on issues related to repairs, installation, or equipment design.
- Drill holes in parts, equipment, or materials.
- Measure distances or dimensions.
- Cut materials according to specifications or needs.
- Maintain repair or maintenance records.
- Install home appliances.
- Travel to work sites to perform installation, repair or maintenance work.
- Order materials, supplies, or equipment.
- Schedule repair, installation or maintenance activities.
- Train others in operational procedures.
- Supervise employees.
- Lay out work according to specifications.
- Operate cranes, hoists, or other moving or lifting equipment.
- Test mechanical systems to ensure proper functioning.
Knowledge, skills & abilities
O*NET importance rating, from 1 (not important) to 5 (extremely important).
Knowledge
| Mechanical | 4.7 | |
| Building and Construction | 4.2 | |
| Customer and Personal Service | 4.0 | |
| Engineering and Technology | 3.5 | |
| Computers and Electronics | 3.3 | |
| English Language | 3.3 | |
| Public Safety and Security | 3.2 | |
| Design | 3.2 | |
| Physics | 3.2 | |
| Mathematics | 3.1 |
Abilities
| Problem Sensitivity | 3.9 | |
| Near Vision | 3.9 | |
| Deductive Reasoning | 3.8 | |
| Oral Comprehension | 3.6 | |
| Arm-Hand Steadiness | 3.6 | |
| Finger Dexterity | 3.6 | |
| Visual Color Discrimination | 3.6 | |
| Inductive Reasoning | 3.5 | |
| Manual Dexterity | 3.5 | |
| Visualization | 3.4 | |
| Oral Expression | 3.3 | |
| Information Ordering | 3.3 | |
| Category Flexibility | 3.3 | |
| Multilimb Coordination | 3.3 | |
| Extent Flexibility | 3.3 | |
| Speech Clarity | 3.3 |
Transferable skills
| Operations Monitoring | 3.6 | |
| Troubleshooting | 3.5 | |
| Installation | 3.4 | |
| Repairing | 3.4 | |
| Complex Problem Solving | 3.3 | |
| Quality Control Analysis | 3.3 | |
| Equipment Maintenance | 3.1 | |
| Judgment and Decision Making | 3.1 |
Essential skills
| Critical Thinking | 3.5 | |
| Reading Comprehension | 3.4 | |
| Active Listening | 3.3 | |
| Speaking | 3.1 | |
| Active Learning | 3.1 | |
| Monitoring | 3.1 |
Skills in demand
Skills employers ask for in job postings for this occupation (Lightcast), with whether each is a common or specialized skill.
Showing the top 40 of 42.
Tools & technology
Work context
How characteristic each condition is of the job, on O*NET's 1–5 context scale (higher = more present in day-to-day work). Each condition links to how it varies across all occupations.
How to get in
- Job zone
- Zone 3 — Job Zone Three: Medium Preparation Needed
- Education
- Most occupations in this zone require training in vocational schools, related on-the-job experience, or an associate's degree.
- Typical entry-level education
- Postsecondary nondegree award · BLS, the typical path — not a requirement
- Related experience
- Previous work-related skill, knowledge, or experience is required for these occupations. For example, an electrician must have completed three or four years of apprenticeship or several years of vocational training, and often must have passed a licensing exam, in order to perform the job.
- Preparation level
- SVP (6.0 to < 7.0) — total schooling plus on-the-job experience.
What to study: Engineering/Engineering-Related Technologies/Technicians , Mechanic and Repair Technologies/Technicians . Fields of study crosswalked to this occupation (NCES CIP–SOC), not a requirement.
Education of current workers
Share of people in this occupation at each level of education.
| Post-Secondary Certificate | 68.1% | |
| Less than a High School Diploma | 20.2% | |
| Some College Courses | 6.9% | |
| High School Diploma | 3.3% | |
| Associate's Degree (or other 2-year degree) | 1.5% |
Interests & work styles
The interests and personal qualities O*NET associates with people who do this work.
Career interests (Holland / RIASEC)
| Realistic | 7.0 | |
| Conventional | 4.3 | |
| Investigative | 2.8 |
Interest areas
Work styles
| Dependability | 3.0 | |
| Attention to Detail | 2.5 | |
| Cautiousness | 2.1 | |
| Perseverance | 1.7 |
Wages & employment
U.S. · annual wages (BLS OEWS)
| 10th percentile | $39,130 |
| 25th percentile | $47,850 |
| Median (50th) | $59,810 |
| 75th percentile | $74,820 |
| 90th percentile | $91,020 |
| People employed | 396,870 |
Industries that employ this occupation
Where these workers are employed, by number of jobs (national, BLS OEWS). Pay shown is the occupation's national median, not industry-specific.
| Industry | Workers | National median pay |
|---|---|---|
| Construction · Sector | 302,390 | $58,770 |
| Plumbing, Heating, and Air-Conditioning Contractors · National industry | 290,620 | $58,750 |
| Wholesale Trade · Sector | 13,810 | $65,760 |
| Retail Trade · Sector | 11,260 | $60,730 |
| Educational Services · Sector | 11,070 | $60,960 |
| Manufacturing · Sector | 10,500 | $61,640 |
| Other Services (except Public Administration) · Sector | 9,890 | $61,660 |
| Administrative and Support and Waste Management and Remediation Services · Sector | 9,230 | $59,590 |
| Electrical Contractors and Other Wiring Installation Contractors · National industry | 6,800 | $61,340 |
| Health Care and Social Assistance · Sector | 5,170 | $67,190 |
| Real Estate and Rental and Leasing · Sector | 3,890 | $68,170 |
| Transportation and Warehousing · Sector | 3,190 | $77,600 |
Where this work is most concentrated
Industries where this occupation is far more common than in the economy as a whole. The location quotient is how many times more concentrated it is here (a value of 5 means five times its economy-wide share).
| Industry | Concentration | Workers |
|---|---|---|
| Plumbing, Heating, and Air-Conditioning Contractors · National industry | 89.15× | 290,620 |
| Construction · Sector | 14.47× | 302,390 |
| Electrical Contractors and Other Wiring Installation Contractors · National industry | 2.46× | 6,800 |
| Other Building Equipment Contractors · National industry | 1.47× | 580 |
| Wholesale Trade · Sector | 0.89× | 13,810 |
| Other Services (except Public Administration) · Sector | 0.87× | 9,890 |
| Utilities · Sector | 0.74× | 1,110 |
| Real Estate and Rental and Leasing · Sector | 0.64× | 3,890 |
Related occupations
Part of the Construction career cluster.
- Stationary Engineers and Boiler Operators · 51-8021.00 Compare →
- Plumbers, Pipefitters, and Steamfitters · 47-2152.00 Compare →
- Control and Valve Installers and Repairers, Except Mechanical Door · 49-9012.00 Compare →
- Home Appliance Repairers · 49-9031.00 Compare →
- Boilermakers · 47-2011.00 Compare →
- Solar Thermal Installers and Technicians · 47-2152.04 Compare →
- Maintenance and Repair Workers, General · 49-9071.00 Compare →
- Geothermal Technicians · 49-9099.01 Compare →
- Industrial Machinery Mechanics · 49-9041.00 Compare →
- Electric Motor, Power Tool, and Related Repairers · 49-2092.00 Compare →
- Mechanical Engineers · 17-2141.00 Compare →
- Helpers--Installation, Maintenance, and Repair Workers · 49-9098.00 Compare →
Side-by-side comparisons place two occupations’ pay, preparation, skills, and AI exposure on the same page — same data, same scale, no forecast.
What you can do with this
Options the data surfaces for Heating, Air Conditioning, and Refrigeration Mechanics and Installers — not advice or a forecast. Each is a real cross-link you can follow into the evidence.
Skills that travel
Capabilities this work builds that are used across many other occupations.
Adjacent roles
Occupations O*NET rates as related — the nearby moves on the map.
Paths in
How people typically prepare for this work.
- Postsecondary nondegree award · typical entry level
- Job zone 3 — Job Zone Three: Medium Preparation Needed · preparation tier
- Engineering/Engineering-Related Technologies/Technicians · field of study
- Mechanic and Repair Technologies/Technicians · field of study
Zoom out
On the global GenAI exposure gradient this work sits around the 36th percentile of 427 international occupations.
Write a report on thisheadline · factoids · citation
Heating, Air Conditioning, and Refrigeration Mechanics and Installers show 25th-percentile AI task overlap — and about 40,100 annual U.S. openings
- Heating, Air Conditioning, and Refrigeration Mechanics and Installers rank in the 25th percentile (Low band) for AI task overlap across U.S. occupations — a measure of how much of the work today's AI can attempt, not how much is automated.Eloundou et al. (GPTs are GPTs) + Felten AIOE
- The occupation is projected to see about 40,100 U.S. job openings per year (2024–34), counting growth and replacement — a labor-demand projection made independently of AI.BLS Employment Projections 2024–34
- BLS projects employment to be growing fast (+8.1%) from 2024 to 2034.BLS Employment Projections 2024–34
- Median annual pay is $59,810, across about 396,870 U.S. workers.BLS OEWS (May 2024)
Copy the whole kit
Heating, Air Conditioning, and Refrigeration Mechanics and Installers show 25th-percentile AI task overlap — and about 40,100 annual U.S. openings • Heating, Air Conditioning, and Refrigeration Mechanics and Installers rank in the 25th percentile (Low band) for AI task overlap across U.S. occupations — a measure of how much of the work today's AI can attempt, not how much is automated. (Eloundou et al. (GPTs are GPTs) + Felten AIOE) • The occupation is projected to see about 40,100 U.S. job openings per year (2024–34), counting growth and replacement — a labor-demand projection made independently of AI. (BLS Employment Projections 2024–34) • BLS projects employment to be growing fast (+8.1%) from 2024 to 2034. (BLS Employment Projections 2024–34) • Median annual pay is $59,810, across about 396,870 U.S. workers. (BLS OEWS (May 2024)) Source: Singulariki — "Heating, Air Conditioning, and Refrigeration Mechanics and Installers". https://singulariki.com/roles/role-49-9021-00 Note: AI task overlap measures what today's AI can attempt, not automation, job loss, or a forecast.
AssetsShare imageMethodology & sourcesPress & newsroomThe newsroom
Every line is built only from figures this page already shows and cites. AI task overlap means what today's AI can attempt — not automation, job loss, or a forecast.
Sources for this page
Every figure above traces to a named public dataset and the exact release below — not hand-written opinion. See the full methodology for what each measure does and does not mean.
- O*NET 30.3 U.S. Department of Labor / National Center for O*NET Development
- BLS Occupational Employment and Wage Statistics (OEWS) May 2024 U.S. Bureau of Labor Statistics
- BLS Employment Projections 2024–2034 U.S. Bureau of Labor Statistics
- Anthropic Economic Index v4 (2026-01-15) + v2 (2025-03-27) Anthropic
- Microsoft “Working with AI” working-with-ai Microsoft Research
- “GPTs are GPTs” (Eloundou et al.) arXiv 2303.10130 OpenAI / academic
- AI Occupational Exposure (AIOE) Felten, Raj & Seamans academic
- ILO / Gmyrek et al. GenAI exposure gradient 2025 International Labour Organization
- IBS O*NET-SOC ↔ ISCO-08 occupation crosswalk 2022 Institute for Structural Research (IBS)
- Frey & Osborne (2013) frey-osborne-automation academic
- Dingel & Neiman (2020) dingel-neiman-workathome academic
Data compiled June 2, 2026. Figures are estimates, not advice.
Cite this page
Plain
Singulariki. "Heating, Air Conditioning, and Refrigeration Mechanics and Installers." Singulariki: a source-backed encyclopedia of work. Built from O*NET 30.3; BLS Occupational Employment and Wage Statistics (OEWS) May 2024; BLS Employment Projections 2024–2034; Anthropic Economic Index v4 (2026-01-15) + v2 (2025-03-27); Microsoft “Working with AI” working-with-ai; “GPTs are GPTs” (Eloundou et al.) arXiv 2303.10130; AI Occupational Exposure (AIOE) Felten, Raj & Seamans; ILO / Gmyrek et al. GenAI exposure gradient 2025; IBS O*NET-SOC ↔ ISCO-08 occupation crosswalk 2022; Frey & Osborne (2013) frey-osborne-automation; Dingel & Neiman (2020) dingel-neiman-workathome. Accessed June 7, 2026. https://singulariki.com/roles/role-49-9021-00
APA
Singulariki. (2026). Heating, Air Conditioning, and Refrigeration Mechanics and Installers. Singulariki: a source-backed encyclopedia of work. Retrieved June 7, 2026, from https://singulariki.com/roles/role-49-9021-00
BibTeX
@misc{singulariki-role-49-9021-00,
title = {Heating, Air Conditioning, and Refrigeration Mechanics and Installers},
author = {{Singulariki}},
year = {2026},
note = {O*NET 30.3; BLS Occupational Employment and Wage Statistics (OEWS) May 2024; BLS Employment Projections 2024–2034; Anthropic Economic Index v4 (2026-01-15) + v2 (2025-03-27); Microsoft “Working with AI” working-with-ai; “GPTs are GPTs” (Eloundou et al.) arXiv 2303.10130; AI Occupational Exposure (AIOE) Felten, Raj & Seamans; ILO / Gmyrek et al. GenAI exposure gradient 2025; IBS O*NET-SOC ↔ ISCO-08 occupation crosswalk 2022; Frey & Osborne (2013) frey-osborne-automation; Dingel & Neiman (2020) dingel-neiman-workathome. Accessed June 7, 2026},
url = {https://singulariki.com/roles/role-49-9021-00}
} Citations name the underlying public dataset releases — they reflect what this page is built from, not just the URL.