Why Choose one over another?

Whilst there are many types of defibrillator available, CHT classifies these into three groups or tiers, based upon what CHT consider to be their suitability and usage in the community, based upon a 50+ point analysis. Others may disagree. This does not reflect technical specifications, which to a non-medically trained person would mean very little.

Communities, generally, are only interested in ease of use, cost, liabilities and reliability. The ability of the equipment to deliver a ‘shock’ is not questioned, as all equipment will have had to meet the MHRA specifications and approval in this aspect, although technically some defibrillators offer a wider shock profile than others. Similarly, most defibrillators can be used in a community setting, depending upon circumstances, and some may be better than others for specific uses. However some equipment is not FDA certified, is more difficult to use for disabled people, or may have confusing features (in a panic) and it is worth considering the impact this may have, as will the ability of the equipment to meet the Disability and Discrimination legislation (e.g EQ 2010), robustness against damage, ease of use, and possibility for errors.

Group 1 Devices

Suitable for community use in most aspects, in most rescue conditions, easily supported remotely, and in particular have features that make their use by untrained & panicking users, or special needs users, easy. They are also compliant to DDA and other guidance; give basic rescue information on the arrival of the ambulance; have metronomes, clear visual as well as audio instructions, and are easily checked and maintained by the community. Unlikely to cause issues in a community setting.

Group 2 Devices

Those that have features that make them, in our opinion, potentially less suitable for untrained-users, and are better reserved for trained-users such as community responders or have features that may give rise to issues when used by untrained users, misunderstandings by members of the public, or may need specific equipment to data download for continuity of care.

Group 3 Devices

Have features or functions that give us cause for doubt about their suitability for community/untrained users, may cause issues in untrained situations, or have been untested by CHT.

These are CHT classifications and are intended to make the selection of equipment easier for communities and to make sure of the appropriateness of the solution to a community. CHT is not beholden to any particular defibrillator manufacturer, and always seek to offer an objective and unbiased view. We advise following manufacturers guidance in the operation and maintenance of equipment.


Defibrillators are reviewed independently from the manufacturers, and assessments done against 50+ criteria that in our opinion are important to communities. These include:

Adult Shock (<150, 150, >150); Fixed or variable; non-Side specific electrodes; electrode regular checks; Rescue ready indicator; Metronome facility; Visual display screen, and many others.

They also include usability tests such AS: Ease of upgrade in the field; designed for untrained-users; ease of use - general CPR guide visual (LED or TV); Rescue data display; Ease of use by children; Ease of use by non-English speakers, or people with disabilities, and more.

Each of these criteria is set a score and the device marked against this score, based upon the manufacturer's specification sheets. Those scoring more than 40 are grouped as being very suitable for community use, those scoring less than 20, are probably not the best devices for community/untrained users. Those between are best suited to trained users. 

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Please make sure you have read and understood this disclaimer - It will be assumed that you have read prior to CHT receiving any request. CHT are not responsible for your fund raising, nor your cPAD operations, but may assist in both. CHTs only aim is to support the installation of a cPAD scheme in the most cost effective way possible adhering to Best Practice, and help save lives in your community. This website, and any downloaded information, is for information only on how to go about obtaining and installing a cPAD, and other relevant information. All copyrights and trademarks are recognised. All support for the cPAD will be undertaken by the village committee responsible and via standard manufacturers warranties. Any training organisation will only be responsible for the initial awareness training and not for the functioning or maintenance of the AED. Please do not send any monies to CHT until you have registered your scheme with us, and have agreement from the local ambulance service for the establishment of a cPAD scheme. All schemes must be registered with the local ambulance service (CHT will also undertake this or you can do via this site, but this does not remove responsibility for you to notify the local ambulance service of your AED location). 999/112 (ambulance) must always be called prior to using a cPAD equipment. VAT may be applicable if your organisation is not an eligible body as defined by HMRC. All current or historical claims for VAT will be met by the local community. All schemes will be asked to sign an agreement taking responsibility for their own fund raising and donations to CHT, and then the operation and maintenance of the cPAD equipment. All CHT provided schemes will need to manage their maintenance through the WebNoS online system as a condition of CHT support. It is your responsibility to maintain the equipment in working order and to make sure the local ambulance service is aware of this. WebNoS makes this possible and also acts as an audit trail for management of the equipment. Sites provided by CHT and not using WebNoS may be disengaged from the ambulance service CAD systems. Any web site showing defibrillator locations is for information only, and should not be used in preference to dialling 999. CHT works in close cooperation with the UK ambulance services. Always dial 999 in an emergency

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