New AED Requirements for Ontario Construction Sites

Why AEDs Are Required on Ontario Construction Sites

We spend a lot of time on construction sites across Ontario. Most days we’re dropping off toilets, checking hand wash stations, or talking with supers about what’s coming up next week. And over the years, one thing has become clear: job sites are busy, loud, and full of moving parts. When something goes wrong, it goes wrong fast.

As of January 1, 2026, the Ontario government has made AEDs mandatory on construction sites. The province didn’t add another rule just for fun. They did it because cardiac arrest is one of the few emergencies where every second matters. And on a construction site, help isn’t always right around the corner.

Key Takeaways

• As of Jan 1, 2026, AEDs are mandatory on some Ontario construction sites to save lives and reduce legal risk.
• Any contractor, site manager, or employer with workers on-site must ensure compliance.
• Place AEDs where they’re easily accessible and ensure enough units to reach anyone in under 2–3 minutes.
• Regularly inspect, maintain, and document AED readiness — logs matter as much as the device itself.
• Train key staff to use the AED and include it in your emergency action plan.
• Staying ahead of these requirements protects workers, reduces liability, and keeps your site running smoothly.
• Construction companies can receive up to $2300 to help with AED and installation costs.

What Is an AED — and Why It Matters on a Job Site

An AED stands for an automated external defibrillator, and it is a small device that gives a shock to restart a heart. It’s simple to use. You turn it on, follow the voice instructions, and it does the rest.

We’ve seen crews freeze during emergencies because they think an AED is “medical equipment.” But these things are built so anyone can use them. Even a first-year labourer who just started last week can grab it and make a difference.

An ambulance often can’t reach your site fast enough. Between traffic, access points, and large projects, response times add up. An AED on-site cuts those minutes down to seconds.

Why Ontario Introduced the AED Requirement

When the Ministry first floated this rule, we heard mixed reactions. Some supers said, “Makes sense.” Others said, “One more thing on my plate.”

But Ontario wasn’t guessing. Data showed that many cardiac arrests happen in workplaces, with 15% of all workplace incidents involving cardiac events occurring on construction sites. That’s because construction sites have major risk factors: heat, strain, stress, heavy lifting, and exposure to dust. The government looked at survival rates and the gaps in response time and made a call: AEDs save lives, and the numbers back it up. Data shows that AED’s, along with CPR can increase survival rates by 50%. It’s not magic. It’s speed. Data also found that survival rates decrease by 10% for every minute without defibrillation. When your crew knows exactly where the AED is and can get to it in under a minute, the outcome changes.

This became part of the broader push for safer jobsites — the same push that brought in working-at-heights rules and more training standards. AEDs are just the next step.

Legal, Insurance, and Liability Implications for Ontario Job Sites

Let’s talk about the part no one likes but everyone has to think about: liability.

If a cardiac emergency happens and your site doesn’t have an AED, you’re exposed — legally and financially. The new regulation makes AEDs a requirement, not a suggestion. Inspectors can issue orders and even shut down parts of the site. Insurance companies also pay attention to compliance. We’ve seen policies get messy when a site lacks required safety equipment.

On the other hand, having an AED — and proving it’s maintained — works in your favour. It shows due diligence. It shows your company takes worker safety seriously. And it reduces your risk when something unexpected happens.

From our side, we’ve watched how quickly safety rules change in Ontario. This one is clear: AEDs will be checked, logged, and verified. If you stay ahead of it, you avoid headaches later.

What the Law Requires

Now that you know why AEDs are becoming part of everyday site life, let’s get into the part every contractor wants to know: what exactly the law says you have to do. We deal with this stuff all the time when we’re out on sites — permits, signage rules, sanitation requirements — so trust us, this one is pretty straightforward once you break it down.

When Your Ontario Job Site Must Have an AED

According to Ontario Regulation 157/25, your site needs to have an AED if the following pertains to you:

• Projects expected to last 3 months or longer
• Projects with 20 or more people working

Contractors, site managers, project owners — basically anyone running a site must comply.

The Key Requirements You Actually Need to Follow in Ontario

Let’s cut through the legal wording and get to the actionable part. The law focuses on three things: the right AED, the right number of AEDs, and the right placement.

Type of AED:

You need a CSA-approved AED that can handle dust, cold, and rough site conditions. We’ve seen cheap online units fail in damp shipping containers — don’t go that route.

How many:

At least one defibrillator needs to be on site, however a good rule we tell clients is this: if you can’t reach an AED and get back to a worker within 3 minutes, you don’t have enough AEDs. Large sites often end up with one at the site trailer and another near the tower crane or high-traffic work zone.

Placement:

AED’s must be placed in a location in which they can be retrieved and returned to the worker within 3 minutes. There must be clear signage showing where the AED is located.

Inspection, Maintenance & Documentation of AED’s

This part trips people up, even though it’s simple. If you own equipment on a site — toilets, heaters, generators — you know the deal: if it’s not documented, it “didn’t happen.” AEDs fall under the same logic.

You have to:

• Check the AED regularly. Most units run self-tests, but you still need eyes on it.
• Record those checks. A clipboard by the AED works fine, or you can use an app.
• Keep the pads and battery in date. If we can track toilet servicing schedules, you can track battery expiry.
• Train staff. The law doesn’t force every worker to train, but it expects that people who run the site know how to use the AED.

When an inspector walks in, they’ll want to see that the AED is present, visible, and logged.

Costs & Funding Support for AED Installation

If the last section left you thinking, “Okay, I get the rule… but what’s this going to cost me?” — you’re not alone. We hear that all the time on-site. Any time a new requirement drops in Ontario, crews want to know the price tag before anything else. The good news? In this case, the government will help cover the bill.

WSIB Funding: Up to $2,300 Toward Your AED

Here’s the part most people miss: the Workplace Safety and Insurance Board will actually reimburse you for a big chunk of your AED purchase.

A few things we’ve learned from being in and out of trailers all year:

• You need to buy a CSA-approved AED to qualify.
• Keep your receipt, you don’t want to toss it in the glovebox and forget.
• The funding applies per AED, not per company, which helps big sites a lot.

We always tell GCs: don’t wait. These programs change fast, and once budgets run out, they’re gone.

Other Incentives and Programs

Depending on your company size, you might qualify for other safety grants or training credits. Some municipalities have small rebates. Some insurance providers offer discounts if you install AEDs and train your supervisors.

We’ve noticed the bigger players jump on these first because they’re already tracking safety KPIs. Smaller contractors usually hear about them much later — usually when another crew mentions it at the gate.

Cost Considerations When Choosing AEDs

Let’s talk real dollars for a second. We’ve seen AEDs priced anywhere from the low $1,000s to over $2,500. On paper, they all “look the same,” but when you’re actually on a job site, the differences matter.

Here’s what we’ve learned from watching AEDs sit in trailers, shipping containers, and outdoor cabinets year-round:

• Dust and cold can kill cheaper units. If you’ve ever opened a frozen porta potty at 6 a.m., you know how rough Ontario weather can be on equipment. AEDs are no different.
• You want long-lasting batteries. Some units need new pads every 2 years. Some every 4. That adds up.
• Visibility matters. If your AED blends into the wall, no one will find it in an emergency.
• Durability beats fancy screens. Touchscreens look cool until they crack or freeze.

Most of our clients end up spending a bit more upfront just to avoid replacing the unit early. With WSIB covering so much of the cost, it often makes sense to go for something rugged.

Final Thoughts

At the end of the day, AEDs aren’t about paperwork or passing an inspection. They’re about giving your crew a real shot if something goes wrong. Make sure your site is compliant before Jan 1, 2026, when this law comes into affect. The rules are simple, the funding helps, and once you’ve got your system in place, it becomes just another part of running a safe, organized site.