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A suitable fire alarm system is an essential element for protecting life and property and is a necessity in most buildings to ensure that building occupants are alerted to a fire situation as early as possible.

Choosing a dedicated and competent supplier to design and install your fire alarm system is paramount to ensure that the system is tailored to the specific risks in your premises, is optimised to provide the earliest possible warning of fire to all occupants and is compliant with current legislation and installation codes of practice.

Safe I.S. Ltd offers a comprehensive design, installation, commissioning and maintenance package (accredited to BAFE SP203-1) for all fire detection systems. We work with industry-leading equipment manufacturers to ensure that we can provide world-class fire safety systems which utilise the latest technologies to keep you, your employees and your property safe.


Third party accredited

Safe I.S. Ltd are proudly third-party accredited to BAFE SP203-1 for the design, installation, commission and maintenance of fire safety systems, meaning you can be sure you are in capable hands.

Our system installation projects are regularly audited by BAFE to ensure they comply with the latest standards and are completed with the highest level of expertise and craft. 

Experts with all system

Our expert team has vast experience from design to installation and commissioning of Conventional, Twin Wire, Addressable, Radio & Air Sampling detection systems. 

We have partnerships with the major manufacturers, allowing us to ensure our product knowledge and engineer training is up to date and also offer competitive pricing across the board.

Knowledgeable & Experienced Team

Our skilled team members have a wide and varied portfolio of previous installations, meaning we are highly experienced in providing systems to meet our customer's needs. 

We understand each project and property differ and our expert team work with you to ensure the project runs smoothly at all times. 

Having worked in offices, warehouses, HMOs, auditoriums, schools, theatres and even air hangers, our team can draw on their experience to find the best solution for your needs. 

Open Protocol Systems Installations

Our commitment is to only install Open Protocol Systems. Some companies offer closed protocol installations, meaning you MUST use specific engineers or even the company who installs the system.

Open Protocol Systems offer a greater degree of flexibility. This means after installation you can choose from a variety of different suppliers to modify or maintain your system and are not tied into one specific company, including ourselves. We provide an option to use our services to maintain the system after installation and are confident you will choose to use our services after the installation process is complete. 


As specialists in our field, we can install a range of innovative systems to meet the requirements of British Standard to both BS5839-1 (non-Domestic) & BS5839-6 (Domestic). Whether that be a small system for a house of multiple occupancy (HMO) or a large office with hundreds of devices, our knowledgeable team will find the best solution for your needs. As direct partners to the manufacturers, we have access to the latest technologies, highest quality products whilst being able to offer a cost-effective solution to all requirements. 


As experts in fire safety, you can count on Safe I.S. Ltd to install your fire alarm system. 
Contact us today to discuss your requirements.

Proud to be Third-Party Accredited to BAFE SP203-1

We are proud to be third party accredited to BAFE SP203-1 for Fire Detection and Alarm Design, Installation, Commissioning/Handover and Maintenance.

The scheme recognises the importance of providing compliant Fire Detection and Alarm Systems and regularly audits records, paperwork and spot checks properties we have installed on an ad-hoc basis.

This accreditation scheme can give you peace of mind that when instructing Safe I.S. we are completing the works to the highest of standards.

To view the confirmation of our accreditation on the BAFE website please Click Here or to learn more about the Bafe accreditation scheme please watch the below video:

Fire Alarm Installation Frequently Asked Questions (FAQ's):

Our Frequently Asked Questions (FAQ's) section is designed to help you with your Fire Alarm Installation queries, however, please feel free to contact us if you would like more detailed information or your question is not listed.

A category can also be described as an objective for the installation of a fire alarm system.

BS5839, both part 1 (Non-Domestic) and part 6 (Domestic) set out these objectives defining and describing the requirements and aims of a fire alarm system. 

These defined objectives (categories) allow the fire alarm designer to understand the desired outcome of installation and therefore meet these requirements.

For Example, Category L3 requires detection to be installed on the escape routes within a property. This allows the designer upon review of the building layout to know what areas require detection installed. 

There are the following categories of Systems defined in BS5839-1 2017:

BS5839-1:2017 in Non-Domestic Properties:

  • L1
  • L2
  • L3
  • L4
  • L5
  • M
  • P1
  • P2

BS5839-6:2017 in Domestic Properties:

  • LD1
  • LD2
  • LD3

More specific information on each category can be found in our other FAQ's.

Under BS5839-6 2019 (For Domestic Properties) as well as categories there are also grades of systems.

These grades essentially advise the designer as to what type of system/detection should be installed.

The Grades are as follows:

  • Grade A - A system that incorporates a Fire Alarm Panel and is installed in accordance with the requirements of BS5839-1:2017.
  • Grade B - Fire Detection and alarm system utilising fire detectors, fire alarm sounders and a control indicating panel to either BSEN54-2or to annex C of BS5839-6. This was removed from the 2019 update to BS5839-6.
  • Grade C - A system of fire detectors and alarm sounders (which may be combined in the form of smoke alarms) connected to a common power supply, comprising the normal mains and a standby supply, with central control equipment.
  • Grade D1: A system of mains powered detectors with sealed tamper-proof backup batteries.
  • Grade D2 - A System of mains powered detectors with user-replaceable batteries.
  • Grade E - A system compromising of mains powered alarms without battery back up (stand by supply).  This was removed from the 2019 update to BS5839-6.
  • Grade F1 - A system of battery-operated detectors with tamper-proof batteries.
  • Grade F2 - A system of battery-operated detectors with user-replaceable batteries. 

The objective of an L1 system is to provide the earliest possible detection of fire to allow the longest available time for escape from a property. 

An L1 category design requires Automatic Fire Detection (AFD) & Manual Call Points (MCP) throughout the entirety of the premises.

Often specified for properties such as Hostels, Hotels, Hospitals, Shopping Centres, Residential Care Homes & Large complex properties.

The first step is to consult your Fire Risk Assessment. Part of this document will advise you which category ( & grade for domestic properties) of system you need to have installed to cover the premises. 

Our designers, provided with this information, will then determine the most suitable type of system & equipment for your property based on a wide range of factors. There is no "one size fits all" in terms of the type of equipment you need to be installed. This is based on what suits the specific property best in a various number of factors, such as cost, product compatibility, device suitability and even decorative appearance (for example in some buildings they require no cabling to be on show so a wireless system may be the best option).

Once provided with the requirements for the system our expert team of designers will guide you along the way and the following discussions will provide the best requirement to suit your and your properties requirements.

The objective of an L2 system is identical to that of an L3 system which is to protect the escape route of the premises to ensure it is clear for evacuation when required. 

However, L2 systems have the additional requirement to cover specified areas of high risk

The High-Risk areas should be determined by the Fire Risk Assessment and then covered by Automatic Fire Detection (AFD) to respond to reducing the risk of the escape route being blocked.

LD1 is often described as a "high level of detection".

This system would require detection installed throughout a dwelling, requiring detectors in all circulation areas that form part of the escape route and in all areas of the premises that a fire may start (excluding toilets and bathrooms). 

The objective of an L3 system is to provide a warning of a fire at an early enough stage to enable all occupants, excluding those possibly in the room of fire origin, to escape the premises safely before the escape routes become impassable.

The L3 category specifies Automatic Fire Detection (AFD) should be installed on the escape routes and all rooms which connect directly onto the escape route.

LD2, has been often referred to as "medium protection". This system would include detectors in all areas that form part of the escape route and in all rooms/areas that have a high risk of fire (For example, Kitchens). 

The objective of an L4 system is to improve the safety for occupants by providing of warning of a fire within the escape routes.

LD3 is the lowest level of detection required inside a dwelling.

Detection would only be required in circulation spaces that form part of the escape route for the property. 

The L5 category is designed for meeting specialist or unique fire safety objectives, often which vary from the "norm" where strict adherence to the requirements of the standard would not provide the optimal system.

L5 systems should be designed in conjunction with, and agreed upon by the relevant authorities before they can be signed off for installation.

An L5/M system should be designed to the full requirements of a category M system with the addition of automatic detection in required areas. 

Category M systems require no Automatic Fire Detection (AFD), rather it relies on the occupants of the building to raise the alarm by operating a Manual Call Point.

These systems will require Manual Call Points & Alarm Devices (Such as sounders, beacons, bells etc) installed throughout the property.

These systems are not often used to cover entire properties, rather specific areas of a property as part of a mixed category system. For example, the office area may have an L3 system and the warehouse or factory has a Category M system installed where occupants would likely notice a fire quicker than AFD would or where AFD could cause a high rate of false alarms.

The information provided in the FAQ's section was correct at the time of writing. Although we always strive to keep this up to date, legislation/standards are frequently updated. This section should not be used as legal guidance and or reference.

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What our clients say ...

“Great company to deal with. We had a Fire Risk done and PAT testing. Very easy to book and very competitive price wise. Will use again.  ”

Martin Slater - 5 Star Rating on TrustPilot

“Consistently Excellent Service - Excellent service We have been using Safe for 3 years and they have never let me down!!!”

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“ Good efficient service, great understanding of our business needs, prompt reporting ”

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“Communication was excellent. On the day of the assessment the man carrying out the assessment arrived early, was thorough and helpful. I received the report in a timely fashion I could not have asked for more.”

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Proudly Third Party Accredited

We are proud to be third party accredited in various fields.

Our varied range of accreditations shows our ability to meet legislation, regulations & guidelines whilst ensuring our work is always completed to the highest of standards.

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