HVAC technician — skills, knowledge and links

How it connects#

O*NET also lists (no page here yet): Stationary Engineers and Boiler Operators · Control and Valve Installers and Repairers, Except Mechanical Door · Home Appliance Repairers · Boilermakers · Solar Thermal Installers and Technicians · Maintenance and Repair Workers, General · Geothermal Technicians · Industrial Machinery Mechanics

In the official classification#

In Europe, internationally and in Singapore

What O*NET rates highest#

From O*NET 49-9021.00 (Heating, Air Conditioning, and Refrigeration Mechanics and Installers). Ordered by O*NET's importance rating; the words are O*NET's own scale anchors.

Each task in O*NET's terms#

O*NET describes work as detailed activities. Each of this page's 5 tasks is matched only against the activities O*NET lists for this occupation, with a stated fit; 5 match at least one. The alignment and its fit are this site's judgement, made task by task by its AI agent (Claude) on 2026-09-26; O*NET does not align tasks like ours. The activity names are O*NET's, the translations ours.

• Installing systems
  Install heating, ventilation, or air conditioning (HVAC) equipment.the closest O*NET has, not the same · Handling and Moving Objects · O*NET 31.0
• Diagnosing and repairing faults
  Inspect systems to determine if they are operating properly.the closest O*NET has, not the same · Inspecting Equipment, Structures, or Materials · O*NET 31.0
  Repair worn, damaged, or defective mechanical parts.covers part of this task · Repairing and Maintaining Mechanical Equipment · O*NET 31.0The same activity in: Aircraft maintenance technician · Auto mechanic
• Handling refrigerants
  Service heating, ventilation or air-conditioning (HVAC) systems or components.covers part of this task · Repairing and Maintaining Mechanical Equipment · O*NET 31.0
• Routine leak inspections
  Determine operational compliance with regulations or standards.the closest O*NET has, not the same · Monitoring Processes, Materials, or Surroundings · O*NET 31.0
• Scheduling and customers
  Schedule repair, installation or maintenance activities.the closest O*NET has, not the same · Scheduling Work and Activities · O*NET 31.0
  Confer with customers or users to assess problems.covers part of this task · Communicating with Supervisors, Peers, or Subordinates · O*NET 31.0The same activity in: Auto mechanic

Tasks O*NET proposes to add#

O*NET's analysts propose new or reworded task statements for future data collection, drawing on what surveyed workers write in, research into new technologies and professional associations. They are candidates, not yet part of the rated task list, and they say nothing about whether automation is involved. This site does not fold them into its own task judgements.

• Contact vendors to order and arrange delivery of parts for customers.New task · 2026-08 · reported by surveyed workers · O*NET 31.0

Rules that bind this work#

Laws, regulations, court rules, regulators' guidance and collective agreements that this page's verified records read — each with the verb that matters and whom it binds. Read from each record by this site's AI agent (Claude) on 2026-09-26. Official names stay in their own language.

Our task judgements#

Sources and rules#

• Each block says where it comes from: this site's own judgements, O*NET, the U.S. Department of Education's CIP–SOC crosswalk, the European ESCO classification and its official crosswalk to O*NET, the ILO's ISCO-08, Singapore's SSOC 2024, or something computed mechanically from those. Nothing on this page is a rating we made up.
• O*NET's importance ratings are used only to order and shorten the lists. They are never combined with this site's impact index or evidence counts.
• The fit between our page and an O*NET occupation is our judgement and is stated per code: same job, broader, part of it, or only the closest there is.
• The ESCO and ISCO-08 fits are derived mechanically from the official ESCO–O*NET crosswalk; where we override it, we say why in our data (for example, the crosswalk pairs radiologists with radiographers, which is a different job). The SSOC 2024 fit is our reading of the Singapore Department of Statistics' own titles and definitions. Official names are shown as their publishers write them; we do not translate them.
• Each task is matched only against the detailed work activities O*NET lists for the codes this page maps to. Where nothing fits, the page says why instead of forcing a match: work O*NET does not describe yet (used only for tasks we judge to be emerging), or nothing in O*NET's list for this occupation. An alignment never changes a task's direction, its basis or the impact index.
• Rules are read only from this site's verified records. A rule's official name must appear word for word in a record that reads it, so no name is made up; a policy mandate is read only as 'must', 'must not' or 'funds', because 'should' and 'in principle' are not a mandate. Reading a rule never changes a task's direction, its basis or the impact index.
• How these pieces fit together — objects, links and the actions that change them — is drawn as one diagram: The VOLO ontology
• ESCO (European Commission), occupation records from the ESCO API; CC BY 4.0. ESCO–O*NET crosswalk, ESCO Secretariat with the U.S. Department of Labor/ETA, version 1 (Sep 2022), O*NET-SOC 2019 ↔ ESCO v1.1.0; CC BY 4.0. Singapore Department of Statistics, Singapore Standard Occupational Classification 2024 and its correspondence with ISCO-08.
• O*NET 31.0 Database, August 2026 release, U.S. Department of Labor/Employment and Training Administration, CC BY 4.0. O*NET® is a trademark of USDOL/ETA. The translations of O*NET descriptors on this page are ours, not O*NET's.