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Stationary Engineers and Boiler Operators vs Heating, Air Conditioning, and Refrigeration Mechanics and Installers

Side-by-side · O*NET · BLS · AI-exposure research · Anthropic Economic Index

A factual, source-backed comparison of Stationary Engineers and Boiler Operators and Heating, Air Conditioning, and Refrigeration Mechanics and Installers on the dimensions both occupations carry. Every figure is a position within an independent published dataset — not a verdict on which job is better, safer, or more “future-proof.”

Stationary Engineers and Boiler Operators Heating, Air Conditioning, and Refrigeration Mechanics and Installers
Median pay · BLS OEWS
$75,190
$59,810
Employment · BLS OEWS
30,780
396,870
AI exposure (percentile) · task overlap, not automation
28th pct
37th pct

At a glance

Dimension Stationary Engineers and Boiler Operators Heating, Air Conditioning, and Refrigeration Mechanics and Installers
Median pay $75,190 $59,810
Employment 30,780 396,870
Employment outlook (2024–34) · BLS projection About average (+2.2%) Growing fast (+8.1%)
Annual openings · BLS projection 3,800 40,100
Typical education · O*NET Most occupations in this zone require training in vocational schools, related on-the-job experience, or an associate's degree. Most occupations in this zone require training in vocational schools, related on-the-job experience, or an associate's degree.
AI exposure · published exposure studies Low · 28th pct Moderate · 37th pct
Global GenAI gradient · ILO ISCO-08 · via crosswalk 32nd pct · 20% of tasks 36th pct · 21% of tasks
Observed AI use · Anthropic Economic Index — —
Mostly remote-capable · Dingel–Neiman No No

Pay and employment are BLS OEWS estimates; outlook and openings are BLS 2024–2034 projections; AI exposure and observed-use figures come from separate research and reflect exposure and usage, not predictions that either job will disappear. Compare like with like.

Skills

Shared: Mechanical, Operations Monitoring, Near Vision, Problem Sensitivity, Oral Comprehension, Oral Expression, Public Safety and Security, Active Listening, Critical Thinking, Equipment Maintenance, Troubleshooting, Repairing, Deductive Reasoning, Inductive Reasoning, Information Ordering, Physics, Engineering and Technology, Reading Comprehension, Active Learning, Monitoring, Complex Problem Solving, Quality Control Analysis, Judgment and Decision Making, Category Flexibility, Arm-Hand Steadiness, Manual Dexterity, Finger Dexterity, Multilimb Coordination, English Language, Computers and Electronics, Mathematics.

Specific to Stationary Engineers and Boiler Operators

  • Chemistry
  • Operation and Control
  • Perceptual Speed
  • Coordination
  • Written Comprehension
  • Selective Attention
  • Control Precision
  • Reaction Time

Specific to Heating, Air Conditioning, and Refrigeration Mechanics and Installers

  • Building and Construction
  • Customer and Personal Service
  • Visual Color Discrimination
  • Installation
  • Visualization
  • Extent Flexibility
  • Speech Clarity
  • Design

Knowledge, skills & abilities O*NET rates as important for each occupation. “Shared” are common to both; the columns list what is distinctive to each (top by the order O*NET surfaces).

Tools & technology

Shared: Spreadsheet software , Office suite software , Electronic mail software , Presentation software , Word processing software , Enterprise resource planning ERP software , Facilities management software , Data base user interface and query software , Graphics or photo imaging software .

Specific to Stationary Engineers and Boiler Operators

Specific to Heating, Air Conditioning, and Refrigeration Mechanics and Installers

Full profiles

This page is a summary. See the complete source-backed profile for Stationary Engineers and Boiler Operators or Heating, Air Conditioning, and Refrigeration Mechanics and Installers — tasks, the full skill graph, tools, work context, preparation, wages by percentile, industries, AI exposure and the AI work map.

More comparisons

Related occupations you can place side by side on the same sourced scale.

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.

Data compiled June 2, 2026. Figures are estimates, not advice.

Cite this page
Plain

Singulariki. "Stationary Engineers and Boiler Operators vs 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/compare/stationary-engineers-and-boiler-operators-vs-heating-air-conditioning-and-refrigeration-mechanics-and-installers

APA

Singulariki. (2026). Stationary Engineers and Boiler Operators vs Heating, Air Conditioning, and Refrigeration Mechanics and Installers. Singulariki: a source-backed encyclopedia of work. Retrieved June 7, 2026, from https://singulariki.com/compare/stationary-engineers-and-boiler-operators-vs-heating-air-conditioning-and-refrigeration-mechanics-and-installers

BibTeX 
@misc{singulariki-stationary-engineers-and-boiler-operators-vs-heating-air-conditioning-and-refrigeration-mechanics-and-installers,
  title  = {Stationary Engineers and Boiler Operators vs 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/compare/stationary-engineers-and-boiler-operators-vs-heating-air-conditioning-and-refrigeration-mechanics-and-installers}
}

Citations name the underlying public dataset releases — they reflect what this page is built from, not just the URL.