Defibrillator Buying Guide: Which AED Should I Buy

Purchasing a defibrillator (AED – Automated External Defibrillator) can feel overwhelming with the wide range of models and features available. Whether you’re buying for a business, school, sports facility, dive centre, or community location, the most important thing is that you’re choosing a unit that is simple to use, accessible in an emergency, and suitable for your environment.

In this guide, we’ll break down the key considerations when choosing an AED, explain the differences between fully automatic and semi-automatic defibrillators, and help you understand storage and cabinet options for keeping your unit ready when it’s needed most.

Fully Automatic vs Semi-Automatic AEDs: What’s the Difference?

One of the first decisions you’ll make is choosing between a fully automatic or semi-automatic defibrillator.

✅ Fully Automatic AED

• How it works: After analysing the heart rhythm, the AED delivers the shock automatically—no button press needed.

• Ideal for: Lay responders, public settings, or where hesitation or panic could delay action.

• Pros:

  • Minimal decision-making needed.

  • Reduces user stress in high-pressure situations.

✅ Semi-Automatic AED

• How it works: After analysis, the AED prompts the responder to press a shock button.

• Ideal for: Settings with trained staff or where control over shock delivery is preferred.

• Pros:

  • Gives the user control over when the shock is delivered.

  • Can feel more reassuring for trained responders.

💡 Our recommendation: If you're buying for a public space or where users may not be trained, a fully automatic AED is often the best choice for simplicity and speed.

Key AED Features to Look For

No matter which style you choose, there are some important features to look for in any defibrillator:

🧠 Ease of Use

• Clear voice prompts and visual instructions

• Minimal buttons or steps

• CPR coaching or metronome guidance

🔋 Battery Life

• Long-life batteries (often 4–5 years or more)

• Low maintenance

• Easy-to-read battery status indicator

💡 Pad Lifespan

• Check how often pads need replacing (usually every 2–5 years)

• Consider buying a unit with universal or adult/child switchable pads

🛡️ Durability

• IP rating for dust and water resistance (e.g., IP55 or higher)

• Shock- and drop-resistant for tougher environments (ideal for outdoor or active settings)

🛠️ Self-Testing

• Automatic self-checks (daily, weekly, or monthly)

• Clear indicator (usually a green light or tick) showing device status

How to Store an AED Properly

Storing your AED correctly is vital to ensure it's functional and accessible in an emergency. Think visibility, accessibility, and protection.

✅ Key AED Storage Guidelines:

• Location: Install it in a visible, unlocked, and easily accessible location known to all staff or users.

• Environment: Protect the AED from extreme temperatures and moisture.

• Signage: Use clear signage to show where the AED is located.

• Maintenance: Nominate a person responsible for regular checks on battery and pad expiry.

Choosing the Right AED Cabinet

Whether your AED is for indoor or outdoor use, the cabinet plays a key role in its protection and accessibility.

🔐 Key AED Cabinet Features to Look For:

For Indoor Cabinets:

• Clear front panel to easily see the AED

• Alarmed when opened (to alert others of an emergency and deter tampering)

• Wall-mountable and compact

For Outdoor Cabinets:

• Heated cabinet (to prevent battery failure in cold weather)

• Weatherproof and sealed (to protect from rain, snow, and wind)

• Lockable or coded (ensure emergency services or first responders have access)

💡 Some community defibs are stored in unlocked cabinets, while others use a code provided by the emergency services when you call 999.

Summary: What’s the Right Defibrillator for Me?

Choosing the right defibrillator comes down to your setting, users, and budget. Here’s a quick summary:

Need Help Choosing?

If you're unsure which AED is best for your environment or want help choosing a suitable cabinet, we're here to help.

Whether you're looking for a straightforward, public-use defibrillator or something more specialist, get in touch and we’ll walk you through the options.

About Us

Rutland First Aid training provides a full suite of first aid training all tailored to your needs. We strongly recommend that everyone has some basic first aid skills, so why not attend one of our CPR and AED courses and know how to do CPR.. you could be the difference between your family member or even work colleagues survival

Rutland First Aid Training provides this information for guidance and it is not in any way a substitute for medical advice. Rutland First Aid Training is not responsible or liable for any diagnosis made, or actions taken based on this information