Updates as of September 22, 2026
The Red Seal refrigeration and air conditioning mechanic exam is 125 questions across six major work activities. Maintenance and service is the largest at 28 questions, 22.4 per cent, followed by installation at 26 and commissioning at 21. Unlike most trades the paper spreads fairly evenly, with no activity below 13 questions.
Red Seal exam breakdownRequired hours differ by province by more than a working year. SkilledTradesBC sets the programme at 6,210 hours of work-based training across four levels plus 990 hours of technical training, while Newfoundland and Labrador's trade profile puts the same trade at 7,200 hours over four years. A candidate assuming one national figure will document the wrong total.
SkilledTradesBC program profileBritish Columbia's challenge route for this trade requires 9,315 documented hours of directly related experience, half as much again as the 6,210 hours an apprentice accumulates, plus a minimum 70 per cent on the Interprovincial Red Seal exam. That premium on the challenge pathway is set provincially and is not a Red Seal rule.
SkilledTradesBC program profileSkilledTradesBC has changed challenge mechanics with effect from 1 August 2026: challengers must now take level exams sequentially rather than jumping to a chosen level. Separately, challenge pathway certification exams have been capped at four attempts since 1 December 2023, with a 30-day wait between attempts.
SkilledTradesBC exam rewritesIn British Columbia the Red Seal exam sits at the end of the fourth level. Levels one to three are closed by SkilledTradesBC standardised written exams, and only level four is examined by the Interprovincial Red Seal paper, which on a pass yields a Certificate of Qualification with Interprovincial Red Seal endorsement alongside the Certificate of Apprenticeship.
SkilledTradesBC program profileRefrigeration and Air Conditioning Mechanic exam blueprint at a glance
| Major work activity | Questions | Share |
|---|---|---|
| A Performs common occupational skills | 13 | 10.4 per cent |
| B Performs routine trade activities | 19 | 15.2 per cent |
| C Plans installation | 18 | 14.4 per cent |
| D Performs installation | 26 | 20.8 per cent |
| E Performs commissioning | 21 | 16.8 per cent |
| F Performs maintenance and service | 28 | 22.4 per cent |
The six activities total 125 questions. The blueprint follows the system lifecycle, from planning through installation and commissioning to service, rather than dividing by equipment type, so questions on a given system can appear in four different blocks.
Dates and windows
| What | When | Status |
|---|---|---|
| Interprovincial Standards Red Seal Examination sitting | Rolling, booked through your provincial or territorial apprenticeship authority | Rolling |
| BC Red Seal exam within the apprenticeship | At level four; levels one to three are closed by SkilledTradesBC standardised written exams | Confirmed |
| BC sequential level-exam challenge rule | Effective 1 August 2026 | Confirmed |
| BC challenge attempt cap | Four attempts maximum, in force since 1 December 2023 | Confirmed |
| BC rewrite waiting period | 30 days from the previous attempt, where a rewrite is permitted | Confirmed |
| BC trade qualifier processing and deadline | About 10 to 12 weeks to process, longer if international; exam must be passed within 24 months of approval | Confirmed |
| Ontario rewrite eligibility | 30 days after the previous exam date; write on the 31st day or later, with a further fee | Confirmed |
| Alberta Trades Qualifier completion window | 18 months, beginning once work experience is verified | Confirmed |
There is no national exam calendar for this trade. Exams are administered on demand by provincial and territorial apprenticeship and certification authorities, so the only firm dates are the eligibility, processing and rewrite clocks in the jurisdiction you apply through.
What this means for your preparation
Refrigeration and air conditioning mechanics arriving from abroad tend to research the Red Seal exam and stop there. The exam is the easy part to research because it is national. What is not national, and what actually determines whether you can sit at all, is the hour requirement, and in this trade the provincial spread is unusually wide: 6,210 work-based hours in British Columbia against 7,200 in Newfoundland and Labrador, and 9,315 hours for a BC challenger who never registers as an apprentice.
A lifecycle blueprint, not an equipment blueprint
The six major work activities follow a system through its life: common occupational skills at 13 questions, routine trade activities at 19, planning installation at 18, performing installation at 26, commissioning at 21 and maintenance and service at 28. That structure matters for revision because it cuts across equipment categories. Knowledge of, say, a supermarket rack system is not a single topic worth a fixed number of marks; the same system generates planning questions in activity C, pipework and charging questions in D, start-up and balancing questions in E and fault-finding questions in F. A candidate who revises by equipment type will find the same gap opening in four places, whereas one who revises by stage of work maps directly onto the question counts.
Service and installation carry the paper
Maintenance and service at 28 questions and performing installation at 26 are 54 of the 125 questions between them, 43 per cent. Add commissioning at 21 and the hands-on execution blocks are three-fifths of the exam. With a 70 per cent pass mark, roughly 88 correct answers are needed, so a strong performance on the two smaller front-end blocks, common occupational skills and planning installation at 31 questions combined, does not compensate for weakness in service. The flat distribution is a feature of this trade's blueprint: no activity is below 13 questions, so unlike trades with a 7 per cent tail block there is nothing here that can safely be written off.
Hours are provincial and this trade shows the widest spread
SkilledTradesBC sets the programme at 6,210 hours of work-based training across four levels, with technical training of 180, 210, 300 and 300 hours by level, 990 hours in total, taking about four years. Newfoundland and Labrador's trade profile for the same trade puts it at four years and 7,200 hours. Alberta's Trades Qualifier route takes the minimum months and hours from the individual trade profile rather than a single figure, verified with the employer named on the application, and gives 18 months to complete. Ontario runs the trade as Refrigeration and Air Conditioning Systems Mechanic, code 313A. Document the hours against the province you intend to certify in, because a shortfall found at assessment is months lost.
The challenge route costs more hours, not fewer
British Columbia's program profile requires 9,315 documented hours of directly related experience to challenge the certification exam, against 6,210 for an apprentice, a premium of over 3,000 hours for not having served a registered apprenticeship. SkilledTradesBC also states more generally that over five years of practical experience is needed to challenge as a Trade Qualifier, that all documents must be in English, that references are contacted by telephone and employers contacted to verify employment, that processing takes about 10 to 12 weeks and longer for international experience, and that the exam must be scheduled and passed within 24 months of approval. Build the evidence file before the application, not after.
Exam mechanics are the same everywhere; the fees are not
The Red Seal Exam Preparation Guide sets four hours, a 70 per cent pass mark, and multiple choice with one correct answer and three incorrect options, each worth one mark. Candidates are supplied with the exam booklet, a diagram booklet where needed, pencil, eraser, calculator, reference materials and scrap paper, and personal electronic devices are prohibited. Fees diverge. Ontario charges 150 dollars plus HST per exam attempt, 235 dollars plus HST for a Trade Equivalency Assessment and 100 dollars plus HST for a reassessment. British Columbia charges nothing for a level exam or its rewrite, 120 dollars for a first challenge certification exam, nothing for a second attempt below 70 per cent, and 100 dollars each for attempts three and four.
Common questions
How many questions are on the Red Seal refrigeration and air conditioning mechanic exam?
One hundred and twenty-five. Red Seal's exam breakdown distributes them across six major work activities: 13 questions on common occupational skills, 19 on routine trade activities, 18 on planning installation, 26 on performing installation, 21 on commissioning, and 28 on maintenance and service. The exam is based on the Red Seal Occupational Standard for the trade. The count is trade-specific, so figures quoted for construction electrician, which is 100 questions, do not apply.
What is the pass mark and how long do I get?
Seventy per cent, in four hours. Both come from the Red Seal Exam Preparation Guide, which also confirms the multiple choice format with one correct answer and three incorrect options and one mark per question. SkilledTradesBC's program profile for this trade repeats the minimum 70 per cent for the Interprovincial Red Seal exam, both for apprentices at level four and for challengers. Skilled Trades Ontario applies the same 70 per cent and four hours to its Certificate of Qualification exams.
How many hours of experience do I need?
It depends entirely on the province. SkilledTradesBC sets 6,210 hours of work-based training plus 990 hours of technical training across four levels for an apprentice, and 9,315 documented hours of directly related experience for a challenger. Newfoundland and Labrador's trade profile puts the programme at 7,200 hours over four years. Alberta takes the minimum months and hours from the individual trade profile and verifies them with your employer. There is no national hour requirement, only a national exam.
Can I challenge the exam without an apprenticeship?
Yes in most provinces, but on stiffer terms. In British Columbia a Trade Qualifier needs over five years of practical experience, and for this trade the program profile specifies 9,315 documented hours. Applications take roughly 10 to 12 weeks to process, longer where the experience is international, references and employers are contacted for verification, and the exam must be passed within 24 months of approval. Ontario uses a Trade Equivalency Assessment instead, requiring evidence of experience equal to the trade's total training time.
Where does the Red Seal exam fit in a BC apprenticeship?
At the end. SkilledTradesBC's program profile shows levels one, two and three each closed by a SkilledTradesBC standardised written exam, with technical training of 180, 210 and 300 hours respectively, and level four, with 300 hours of technical training, closed by the Interprovincial Red Seal exam. On passing at a minimum of 70 per cent and completing 6,210 work-based hours, the candidate receives a Certificate of Qualification with Interprovincial Red Seal endorsement together with a Certificate of Apprenticeship.
How is this exam different from the plumber or electrician Red Seal exam?
All three sit inside the same Red Seal Program with the same 70 per cent pass mark and four-hour allowance, but each has its own occupational standard and blueprint. This paper is 125 questions across six activities organised by lifecycle stage. The plumber paper is also 125 questions but across seven activities organised by system type, with drainage alone at 32 questions. The construction electrician paper is 100 questions across five activities, with wiring systems at 30. Prepare from your own trade's breakdown page.
