Registered HVAC technician apprentices by county, open recruitment windows where the state publishes them, and how the apprentice tier fits Colorado's licence ladder. Updated nightly.
Colorado has 71 registered HVAC technician apprentices in active status (fiscal year 2025, DOL RAPIDS), placed in 13 counties, 0.1 per 10,000 residents. That is 0.7 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 |
|---|---|---|---|
| Arapahoe County | 14 | 20% | 0.2 |
| El Paso County | 12 | 17% | 0.2 |
| Jefferson County | 11 | 15% | 0.2 |
| Denver County | 10 | 14% | 0.1 |
| Adams County | 7 | 10% | 0.1 |
| Douglas County | 4 | 6% | 0.1 |
| Gunnison County | 3 | 4% | 1.7 |
| Weld County | 3 | 4% | 0.1 |
| Larimer County | 2 | 3% | 0.1 |
| Pueblo County | 2 | 3% | 0.1 |
| Broomfield County | 1 | 1% | 0.1 |
| Delta County | 1 | 1% | 0.3 |
| Fremont County | 1 | 1% | 0.2 |
Source: DOL RAPIDS apprenticeship FY2025, active status, county-coded; as of December 31, 2025.
The Colorado register ATI reads carries no separate apprentice-tier credential for HVAC technicians; its ladder for this trade starts at Journeyman (13 active records, read September 16, 2026). Registered apprentices in the county table above are counted from the federal apprenticeship system, not from the licence register.
Credential types the No statewide HVAC licence and no state mechanical board. Colorado's Division of Professions and Occupations licenses electricians and plumbers but not HVAC; mechanical licensing is municipal. issues for this trade: Municipal mechanical contractor licences (e.g. Denver, Colorado Springs), Federal EPA Section 608 technician certification, No state HVAC licence. See how to get a HVAC technician license in Colorado 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: Colorado register read September 16, 2026; population: U.S. Census 2023 estimates.
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