Building Services 2024 Overview - What Is Tested and How to Prepare

Official timing to keep straight

• The 2024 Ontario Building Code came into effect on January 1, 2025.
• Ontario allowed a transition period through March 31, 2025 for permit applications already in flight.
• Humber’s registration site says Ontario Building Code exams based on the 2024 Building Code start on March 30, 2026.

If your sitting date is close to the transition, confirm the code cycle with Humber before you lock your study plan.

Official exam snapshot

Humber describes Ontario Building Code exams as:

• Open-book
• 3 hours
• 70 multiple-choice and true/false questions

That means this exam is not just about knowing rules. It is about finding the right rule quickly, reading the scope correctly, and not getting pulled into material outside the syllabus.

What Building Services 2024 is really testing

This exam rewards five things:

1. Part 6 system control: knowing where HVAC and service-system requirements live.
2. Cross-disciplinary reading: handling fire, plumbing, electrical, and vertical-transport interactions without losing the main system.
3. Service-space awareness: recognizing when shafts, rooms, penetrations, or equipment locations drive the answer.
4. Energy and retrofit crossover: spotting the Part 11 and Part 12 items that matter.
5. Fast navigation: getting to the right section, article, and standard quickly.

Practical study buckets

• Part 6 core: ventilation, ducts, equipment, service spaces, and mechanical-system rules.
• Fire-protection crossover: dampers, smoke control, detectors, and related fire-safety interactions.
• Plumbing, electrical, and transportation crossover: systems that interact with the service design question.
• Part 9, Part 11, and Part 12: small-building support items, retrofit issues, and energy/resource conservation.
• Supplementary standards: SA-1, SB-1, SB-2, SB-4, SB-10, and SB-12.

Common ways candidates lose time

• Turning the exam into a generic mechanical-engineering review instead of an Ontario code-navigation problem.
• Missing the fire-safety consequence of a service-system choice.
• Forgetting that shafts, service rooms, and penetrations often control the answer.
• Skipping the supplementary standards and Part 12 items.

A practical prep approach

1. Build a clean Part 6 map.
2. Group related fire and service-space rules beside each major system.
3. Add plumbing, electrical, and vertical-transport crossover items.
4. Review the named standards in parallel with the code text.
5. Finish with timed mixed review so you can switch systems under pressure.

Next: use the Study Plan and Syllabus together.