Refrigeration and Air Conditioning Mechanic Apprenticeship in Ontario

Required hours, technical training levels and the Red Seal exam — plus a progress tracker that estimates your time to certification.

Requirements as of June 28, 2026 — official requirements vary by province and change. Always confirm with Skilled Trades Ontario.

Verify with Skilled Trades Ontario

On-the-job hours required

8,280

In-school technical levels

3

720 in-school hours

Certifying exam

Red Seal

Certificate of Qualification (C of Q) — Interprovincial Red Seal exam

Red Seal trade

Yes

Interprovincial endorsement

Refrigeration and Air Conditioning Mechanic in Ontario — level breakdown

Provincial trade code 313A · NOC 72402

Level / periodOn-the-job hoursIn-school training
Level 12,760240 hrs
Level 22,760240 hrs
Level 32,760240 hrs
Total8,280720 hrs

Official STO trade name is 'Refrigeration and Air Conditioning Systems Mechanic' (313A). Compulsory trade in Ontario. STO publishes totals only (8,280 on-the-job + 720 in-school = 9,000 hrs over 3 levels); per-level splits are an even distribution of the verified totals — STO does not publish a per-level breakdown.

Track your progress

Enter what you have completed. Saved on this device only — no account needed.

Apprenticeship hours0%

You appear to be in Level 1 of 3 based on hours logged.

On-the-job hours remaining

8,280

Percent complete
0%
Hours logged
0
Estimated completion
July 2030

Red Seal readiness

  • On-the-job hours met (8,280 required)
  • In-school technical training complete (3 levels)
  • Eligible to write the Certificate of Qualification (C of Q) — Interprovincial Red Seal exam (Red Seal)

Keep logging hours and completing levels. When all items are checked, you can apply to write the Certificate of Qualification (C of Q) — Interprovincial Red Seal exam.

Next step at Skilled Trades Ontario

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Frequently asked questions

How many hours to become a refrigeration and air conditioning mechanic in Ontario?+

In Ontario, the refrigeration and air conditioning mechanic apprenticeship requires about 8,280 on-the-job hours plus 3 levels of in-school technical training (720 in-school hours), then the Certificate of Qualification (C of Q) — Interprovincial Red Seal exam. Verified June 28, 2026 with Skilled Trades Ontario — confirm current requirements there.

Is Refrigeration and Air Conditioning Mechanic a Red Seal trade in Ontario?+

Yes. Refrigeration and Air Conditioning Mechanic is a Red Seal designated trade, so passing the Interprovincial Red Seal exam adds a Red Seal endorsement recognized across participating provinces.

How many hours do you need to become a Red Seal tradesperson?+

It varies by trade and province. Most Red Seal apprenticeships run about 6,000–9,000 on-the-job hours over roughly four to five years, plus three to four levels of in-school technical training, then the Interprovincial Red Seal exam. Always confirm the current hours with your provincial apprenticeship authority.

What is a Red Seal endorsement?+

The Red Seal is the national standard for skilled trades in Canada. Passing the Interprovincial Red Seal exam in a designated trade adds a Red Seal endorsement to your provincial certificate, letting you work in that trade across participating provinces and territories without re-certifying.

Do apprenticeship requirements change?+

Yes. Required hours, technical-training levels and exam rules are set by each provincial authority and are updated periodically. The figures here were verified on their effective date, but you must confirm the current requirements with the official authority linked on every page before relying on them.

Does the tracker need an account?+

No. Your logged hours, completed levels and weekly average are saved in your browser on this device only — there is no sign-up and nothing is sent to a server.

Methodology & sources

Figures for the refrigeration and air conditioning mechanic apprenticeship in Ontario were verified against Skilled Trades Ontario on June 28, 2026 (Skilled Trades Ontario — Refrigeration and Air Conditioning Systems Mechanic (313A) trade page). The Red Seal exam is administered under the national Interprovincial Standards program.

Requirements vary by province and route and change over time. Confirm the current hours, levels and exam eligibility with Skilled Trades Ontario before relying on them.

Last reviewed June 28, 2026. Estimates are indicative — verify against current product specs and local requirements before ordering.

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