AED and cold: how to protect your defibrillator during winter

When temperatures drop, don't just think about pulling out your hat and gloves: your automated external defibrillator (AED) also needs a little protection!
Freezing temperatures, snow, humidity, and thermal variations can compromise the device's proper functioning. In an emergency, every second counts, and an AED must always be fully operational, regardless of the weather.

Here's how to ensure your AED stays ready to save a life, even in the heart of winter in Quebec.

The effects of cold on an AED

AEDs are designed to withstand certain conditions, but most need to be kept within a temperature range of 0°C to 50°C.

Below this threshold, several problems can occur:

• Decreased battery performance, which can reduce the device's autonomy.
• Freezing or hardening of electrodes, which can compromise their adhesion and the effectiveness of the shock.
• Condensation and humidity, which can damage internal electronic components.

In other words, an AED exposed to cold without adequate protection risks being unusable when it is most needed.

Indoors: a temperate and accessible location

If your AED is stored inside a building (business, school, community center, etc.), make sure it is in a temperate, dry, and easily accessible location.

• Avoid areas near exterior doors or windows, where cold drafts can affect the device's temperature.
• Install it at a visible height, in a well-marked location, and regularly check its indicator light to confirm it is operational.

In a vehicle

Some intervention teams or businesses keep an AED in their vehicle. In this case:

• Avoid leaving it in the trunk, where the temperature can drop quickly.
• Keep it in an insulated bag and inside the passenger compartment when it's very cold.
• Frequently check the device and its batteries, especially during cold spells, to ensure they remain within their recommended temperature range.

Outdoors: opt for a heated cabinet

For AEDs installed outdoors, a heated and well-insulated cabinet is essential. This type of equipment helps maintain an optimal temperature and prevents components from freezing. Models such as AIVIA and ARKY, for example, are known for their weather resistance and integrated heating system.

Made from robust polycarbonate or stainless steel, these cabinets:

• Maintain the internal temperature above freezing point.
• Protect against snow, rain, and humidity.
• Are highly visible, thanks to their design, lighting, or clear markings.
• Can be equipped with an opening alarm, ensuring security and quick location in an emergency.

Tip: Make sure the cabinet is installed in a visible and accessible location, away from direct sunlight and snow accumulation.

Maintenance and regular checks

During winter, it is recommended to perform more frequent checks of your AED and its environment.
Here are the essential points to check:

1. The indicator light: it must show that the device is ready for use.
2. The condition of the electrodes: ensure they are neither rigid nor detached.
3. The integrity of the casing: no condensation, signs of frost, or water infiltration.
4. The internal temperature of the cabinet: it must remain within the recommended range.
5. The battery: monitor its expiration date and remaining autonomy.

These small preventive measures ensure that your AED will always be ready to function, regardless of the conditions.

In summary

Quebec's cold weather is harsh, but your AED can handle it with a little care!
Whether you store it indoors, in a vehicle, or outdoors, the key lies in good insulation, stable temperature, and regular checks.

A well-protected defibrillator is a reliable, effective device, ready to save a life at any time!