Registered HVAC technician apprentices by county, open recruitment windows where the state publishes them, and how the apprentice tier fits Connecticut's licence ladder. Updated nightly.
Connecticut has 618 registered HVAC technician apprentices in active status (fiscal year 2025, DOL RAPIDS), placed in 7 counties, 1.7 per 10,000 residents. That is 15.2 apprentices for every 100 employed HVAC technicians in the state, the rate at which the trade is training its own replacements.
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Registered HVAC technician apprentices by county of the apprentice, largest first. Each county links to its HVAC technicians market page.
| County | Apprentices | Share | Per 10k residents |
|---|---|---|---|
| Capitol Planning Region | 192 | 31% | 2.0 |
| South Central Connecticut Planning Region | 186 | 30% | 3.3 |
| Western Connecticut Planning Region | 109 | 18% | 1.7 |
| Northwest Hills Planning Region | 43 | 7% | 3.8 |
| Southeastern Connecticut Planning Region | 38 | 6% | 1.4 |
| Lower Connecticut River Valley Planning Region | 36 | 6% | 2.0 |
| Northeastern Connecticut Planning Region | 14 | 2% | 1.4 |
Source: DOL RAPIDS apprenticeship FY2025, active status, county-coded; as of December 31, 2025.
Connecticut records apprentices on its own HVAC technician licence register as HEATING TRAINEE: 19 active apprentice-tier records, register read September 16, 2026. The register's apprentice tier and the federal registered-apprenticeship count in the county table are two different systems: a licence-register apprentice is anyone the state has credentialed to work under supervision, a registered apprentice is enrolled in a DOL-registered program.
Counts are license records, not people: a holder with more than one license appears once per license, and a contractor license is a business, not a worker.
Credential types the Connecticut Department of Consumer Protection, Occupational and Professional Licensing Division, with the trades regulated under Chapter 393 of the Connecticut General Statutes issues for this trade: S-1 Unlimited Heating, Piping and Cooling Contractor, S-2 Unlimited Heating, Piping and Cooling Journeyperson, S-3 / S-4 Limited Heating, Cooling and Piping (contractor / journeyperson), S-7 / S-8 Limited Contractor and Journeyperson, S-9 / S-10 Limited Heating Cooling (contractor / journeyperson), D-1 / D-2 Limited Warm Air, Air Conditioning and Refrigeration, D-3 / D-4 Limited Cooling, B-1 through B-4 Limited Gas and Oil Burner, G-1 / G-2 Limited Heating, Piping and Cooling, PP-1 / PP-2 Limited Process Piping, SM-1 / SM-2 Sheet Metal. See how to get a HVAC technician license in Connecticut for hours, exams and renewal.
Sources: registered apprentices: DOL RAPIDS apprenticeship FY2025, active status, as of December 31, 2025; employment: BLS QCEW construction x OEWS occupation share (estimate); licence tiers: Connecticut register read September 16, 2026; population: U.S. Census 2023 estimates.
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