How to become an HVAC technician in California
Licensing details from the official agency pages, updated November 11, 2026. Confirm current fees with the agency before you apply.
1. California licensing: Contractors State License Board (CSLB)
- California licenses the contracting business. The C-20 classification, Warm-Air Heating, Ventilating and Air-Conditioning Contractor, covers fabricating, installing, maintaining, servicing and repairing warm-air heating systems, ventilating systems and air-conditioning systems.
Official sources: CSLB: C-20 classification · CSLB: Get licensed to build.
2. Federal EPA Section 608 certification
In every state, 40 CFR 82.161 requires technicians who could reasonably be expected to violate the integrity of a refrigerant circuit to pass an EPA-approved exam. See our EPA 608 guide.
3. Training: 60 HVAC schools in California
The U.S. Bureau of Labor Statistics says HVAC programs at technical schools and community colleges generally last 6 months to 2 years, and apprenticeships usually last several years with paid on-the-job training (search apprenticeship.gov).
California schools with the most HVAC programs:
- Harbor Occupational Center-LAUSD, San Pedro (Certificate, 12 weeks to less than 1 year)
- DeHart Technical School, Modesto (Certificate, 1 to less than 2 years; Certificate, 12 weeks to less than 1 year)
- San Joaquin Valley College-Bakersfield, Bakersfield (Associate's degree; Certificate, 1 to less than 2 years)
- San Joaquin Valley College-Hesperia, Hesperia (Associate's degree; Certificate, 1 to less than 2 years)
- San Joaquin Valley College-Ontario, Ontario (Associate's degree; Certificate, 1 to less than 2 years)
- San Joaquin Valley College-Rancho Mirage, Rancho Mirage (Associate's degree; Certificate, 1 to less than 2 years)
- San Joaquin Valley College-Temecula, Temecula (Associate's degree; Certificate, 1 to less than 2 years)
- San Joaquin Valley College-Trades Education Center, Fresno (Associate's degree; Certificate, 1 to less than 2 years)
See all 60 HVAC schools in California, including published program prices from $1,135 to $26,377.
Frequently asked questions
Do you need a license to be an HVAC technician in California?
Contractors State License Board (CSLB) handles licensing. California licenses the contracting business. The C-20 classification, Warm-Air Heating, Ventilating and Air-Conditioning Contractor, covers fabricating, installing, maintaining, servicing and repairing warm-air heating systems, ventilating systems and air-conditioning systems. Federal EPA Section 608 certification applies in every state to anyone who handles refrigerants.
Where can I go to HVAC school in California?
60 schools in California offer HVAC programs, across 46 cities. Browse the full list on our California HVAC schools page.