Defibrillator Buyers Guide: Choosing the Right AED for Your Workplace
Introduction
Sudden cardiac arrest can happen to anyone, anywhere — and survival rates drop by around 10% for every minute without defibrillation. With ambulance response times averaging 8–11 minutes in the UK, having an Automated External Defibrillator (AED) on site isn't just good practice; in many workplaces it could be the difference between life and death.
This guide by Cocus covers the main types of defibrillators available, the difference between semi-automatic and fully automatic models, and how to choose the right AED for your workplace, school, or public building.
1. Semi-Automatic Defibrillators
Semi-automatic AEDs guide the user through every step with voice prompts, but require the operator to press a button to deliver the shock. This gives the user a moment of control and is the most widely used type in workplace and community settings. Modern semi-automatic AEDs are designed to be used by anyone — no medical training required.
Mediana HeartOn A15 Semi-Automatic AED
A compact, straightforward AED designed for first-time responders. The A15 walks users through the entire process with clear voice guidance and visual prompts, and a single switch flips the unit between adult and paediatric mode — no separate paediatric key needed. Includes pre-connected pads, carry case, and long-life battery. Well suited to schools, sports clubs, and smaller workplaces. £1,199.94.
Mediana HeartOn A16 Semi-Automatic AED
The upgraded A16 adds multilingual instructions (English, Welsh, and Polish), an IP55 dust and water resistance rating, and a 5-year warranty — making it the more robust choice for busy or outdoor environments. Ready to use in 10 seconds, and includes universal electrode pads, lithium battery, and SD card for data logging. £1,307.94.
2. Fully-Automatic Defibrillators
Fully-automatic AEDs remove the shock-delivery step entirely — once the device determines a shock is needed, it delivers it automatically without any button press. This makes them the preferred choice in environments where bystanders may panic under pressure, or where the device may be operated by someone with no first aid experience at all.
Mediana HeartOn A16 Fully-Automatic AED
Identical build quality to the A16 Semi-Automatic — IP55 rated, multilingual, 5-year warranty — but fully automated shock delivery. The device analyses the heart rhythm and delivers a shock without requiring user input. Ideal for public-access locations such as reception areas, sports facilities, shopping centres, and car parks where the operator may be a member of the public. Ready in 10 seconds. £1,409.94.
3. AED Bundle Kits
If you're purchasing a defibrillator for the first time, a bundle kit is the most practical choice. Bundles combine the AED unit with the mounting bracket, electrode pads, and other essential accessories — everything you need to be compliant and operational from day one.
Mediana A16 Bundle — Semi-Automatic
Includes the A16 Semi-Automatic AED, a universal wall-mount bracket, electrode pads, lithium battery, SD card, and an AED prep kit. Everything required to install and operate from the box. £1,499.94.
Mediana A16 Bundle — Fully-Automatic
The fully-automatic version of the same complete bundle — AED unit, mounting bracket, pads, battery, SD card, and prep kit. The recommended choice for public-access installations where the device may be operated by an untrained bystander. £1,619.94.
4. AED Accessories
To keep your defibrillator compliant and ready, you'll need to replace consumables on schedule and ensure the unit is properly mounted. Key accessories include:
Universal AED Wall Bracket
A wall-mount bracket compatible with most AED models, ensuring the device is clearly visible, accessible, and securely stored. Essential for any fixed installation. £82.74.
Mediana A16 Adult/Paediatric Electrode Pads
Pre-connected replacement pads for the A16 AED, suitable for both adults and children. Electrode pads have a shelf life of approximately 2 years and must be replaced after any use. Each sealed pack includes one pair. £154.74.
5. How to Choose the Right Defibrillator
All AEDs are designed to be used by anyone without medical training — but the right choice depends on your environment, who will be operating it, and your budget.
1. Semi-Automatic vs. Fully-Automatic
For trained first aiders or workplaces with a first aid programme, semi-automatic is the standard choice. For public-access locations where anyone might need to operate it under stress, fully-automatic removes the shock-delivery decision entirely and is generally recommended. The price difference is small — around £100.
2. Indoor vs. Outdoor Installation
If the AED will be installed outdoors or in a dusty/wet environment (sports pitches, building sites, car parks), choose a model with at least an IP55 dust and water resistance rating. The A16 range meets this standard; the A15 is better suited to indoor use.
3. Bundle vs. Unit Only
If this is your first AED, buy a bundle. It includes the mounting bracket, pads, and everything needed to be operational from day one. If you're replacing a unit or adding a second device where you already have accessories, buying the AED unit alone is the more cost-effective option.
4. Registering Your AED
All defibrillators in England should be registered with The Circuit — the national defibrillator network operated by the British Heart Foundation. Registration is free and ensures ambulance services know your AED's location, so they can direct bystanders to it in an emergency. It takes around 5 minutes online at thecircuit.uk.
6. Defibrillator Frequently Asked Questions
Q1: Is it a legal requirement to have a defibrillator at work?
There is currently no UK law requiring most private businesses to have an AED, though legislation has been discussed in Parliament. However, under the Health and Safety at Work Act 1974, employers have a duty to ensure the health and safety of employees — and guidance from St John Ambulance and the HSE recommends AEDs in workplaces with higher cardiac arrest risk (older workforce, physically demanding roles, or large numbers of staff and visitors).
Q2: What's the difference between semi-automatic and fully-automatic?
Both guide you through the process step-by-step with voice instructions. A semi-automatic device tells you when to press the shock button; a fully-automatic device delivers the shock itself when needed. For untrained users in a panic, fully-automatic removes one potential point of failure.
Q3: Can anyone use a defibrillator?
Yes. Modern AEDs are specifically designed for use by bystanders with no medical training. The device analyses the heart rhythm and will only deliver a shock if it detects a shockable rhythm — it cannot harm someone who doesn't need defibrillation.
Q4: How often do AED pads and batteries need replacing?
Electrode pads typically have a 2-year shelf life and must be replaced immediately after any use. Batteries generally last 5 years in standby. Both will have an expiry date printed on the packaging — set a calendar reminder to check these annually.
Q5: Are government grants available for defibrillators?
Yes — the NHS and several charitable organisations offer grant funding for AEDs, particularly for community spaces, sports clubs, and schools. Our guide to Government Grants for Defibrillators covers the main schemes currently available.
Q6: Where can I buy a defibrillator in the UK?
Cocus stocks a full range of Mediana AEDs and accessories, shipped from our Manchester warehouse. We supply businesses, schools, sports clubs, and community organisations across the UK. Contact us at info@cocus.co.uk if you need help choosing the right model.
Conclusion
A defibrillator is one of those pieces of equipment that you hope you'll never need — but that's entirely worthless if it isn't there when you do. Modern AEDs are simple, affordable, and genuinely life-saving. For most workplaces, a semi-automatic AED bundle gives you everything you need to be compliant and operational. For public-access locations, fully-automatic is the safer choice.
Browse our full range of defibrillators and AED accessories at Cocus — with next-day delivery available on selected products and expert advice on hand if you need it.