New AED Requirements Coming to Ontario Construction Sites — Effective January 1, 2026

Learn what Ontario’s new AED regulation requires and how your team can stay compliant with proper CPR and AED training.

Big news for Ontario’s construction sector

Automated external defibrillators (AEDs) will soon be mandatory on many construction projects. These changes stem from the Working for Workers Seven Act, 2025 and the newly published Ontario Regulation 157/25, which adds Section 27.1 to the Construction Projects Regulation, and outlines exactly when AEDs are required and what employers need to do to comply.

Here’s what changed, why it matters, and who is affected.

What Happened?

The Ontario government has passed legislation requiring AEDs on certain construction sites.

The new regulation comes into force January 1, 2026 and sets out clear requirements for constructors.

Under the regulation, an AED must be installed and maintained on any construction project where:

• 20 or more workers are regularly employed, and
• The project is expected to last 3 months or longer

Once the regulation takes effect, the Ministry of Labour, Immigration, Training and Skills Development (MLITSD) expects applicable projects to already have AEDs in place and be operating in compliance on day one.

Get compliant. Get trained.

CPR and AED training is included in CrossSafety’s First Aid course.

Get certified today: Standard First Aid CPR/AED Level C — SkillsCross

Why This Matters

Sudden cardiac arrest can happen anywhere — including active construction sites. AEDs save lives, and access within minutes can be the difference between survival and tragedy.

These requirements also support safer worksites by:

1. Reducing response time during emergencies

2. Strengthening safety culture

3. Reducing risk and liability for constructors

By complying with the new regulation, employers limit exposure to fines, stop-work orders, and reputational harm that can follow non-compliance.

Who Is Affected?

These requirements apply only to construction projects that meet both thresholds:

• 20+ workers employed regularly, and
• Project duration of at least 3 months

If your project meets these criteria, the constructor must ensure:

• At least one AED is installed on site
• The AED is clearly identified and accessible to all workers
• At least one person trained in CPR and AED use is present on the project
• Additional AED units are installed as needed, considering project size, layout, and worker distribution

MLITSD inspectors will begin with an education-focused approach, but — as always — compliance is enforced at the inspector’s discretion based on site conditions.

What About the WSIB Reimbursement Program?

The provincial government previously announced that the WSIB will introduce a reimbursement program to help constructors offset the cost of purchasing AEDs.

However — final details have not been released yet.

Timelines, reimbursement amounts, and unit eligibility are expected from the WSIB on or around December 10, 2025.

CrossSafety will update this article as soon as official information is published.

(For questions, the WSIB has provided: [email protected].)

Are your projects affected by this new AED regulation?

Make sure your team is compliant and prepared. CrossSafety offers AED training as part of our CPR & First Aid course.

Get certified today: Standard First Aid CPR/AED Level C — SkillsCross