Choosing the right fire alarm system feels straightforward until you actually start looking. Then come the grades, the categories, the system types, the British Standards references, and the quiet realisation that getting it wrong isn’t just an inconvenience, it’s a legal liability.

This guide is here to change that. Whether you manage a care home, a block of flats, a school, or a small commercial unit, we’ll walk you through exactly what fire alarm systems are available in the UK, how they differ and how to match the right one to your building. No jargon overload. No guesswork. Just clear, practical guidance that helps you make a confident decision.

There’s a question almost every responsible person asks at some point: what’s actually the difference between a conventional and an addressable fire alarm system? The answer shapes everything else, so it’s the right place to start.  

How Conventional Fire Alarm Systems Work

A conventional fire alarm system divides your building into zones, each wired back to a central control panel. When a detector or call point activates, the panel lights up to show which zone is triggered – but not which individual device caused it.

That’s fine in a small building. If your premises is a single-storey office or a compact shop, ‘Zone 2, Ground Floor’ tells you everything you need to respond quickly. The system is reliable, cost-effective and fully compliant with BS 5839-1 when correctly designed and installed.

The limitation shows up in larger or more complex premises. Searching an entire zone to find the source of an alarm costs time you may not have. For a building with multiple floors, separate wings, or vulnerable occupants, that gap between ‘zone’ and ‘exact location’ can matter enormously.

We stock conventional fire alarm panels and accessories with two zone fire alarm system and four zone fire alarm system configurations from Apollo, AlarmSense and Rafiki (all compliant with BS 5839-1). For smaller premises with straightforward layouts, conventional systems remain a proven and practical option.

Addressable systems take a different approach entirely. Every device on the system (every smoke detector, every heat detector, every manual call point) carries a unique electronic address. When one activates, the control panel doesn’t just show a zone. It shows exactly which device triggered and where it is, right down to the room.  

Addressable systems have become the standard across most commercial premises in the UK, and the reasons are straightforward.  

The straightforward answer is: addressable. Rather than being limited to general zone information, addressable alarm systems can identify individual alarms and pinpoint the location of a fire or any fault. In alarm condition, the panel shows not only the zone number but also a text description to indicate the exact location of the triggered device.

That said, ‘most common’ isn’t the same as ‘always right’. The appropriate system for your building depends on its size, layout, occupancy type, risk level and the outcome of your fire risk assessment. Conventional fire alarm systems are compliant and legitimate in smaller, lower-risk premises. Conventional systems tend to fit smaller or lower-risk environments, while addressable systems are usually more appropriate for larger or higher-risk premises, including care settings, schools and hospitals, because the panel can tell you precisely where the activation occurred.

Wireless systems sit alongside both as a third option, delivering addressable-level precision without the cable runs. They’re popular in listed buildings, churches and occupied premises where installation work needs to be kept to a minimum.

System type is one half of the picture. The other half is understanding how grades and categories define what level of protection your system must deliver. They’re often confused, but they answer two different questions.  

Here’s how those categories break down in practice:  

Category M is the simplest form. There’s no automatic fire detection. The first person to find the fire operates a manual call point, which activates the system and warns everyone in the building. If a fire starts in an unoccupied part of the building, it could grow undetected for some time. That’s an acceptable risk in some very small, always-staffed premises, but it’s not appropriate for buildings with sleeping occupants or complex layouts.

The L categories are the most relevant for the majority of commercial buildings. An L1 system, installed throughout all areas of a building, aims to offer the earliest possible warning of fire so as to achieve the longest available time for escape. An L2 system includes the coverage of L3, with the additional objective of affording early warning in specified areas of high fire hazard. An L3 system is designed to give warning early enough for all occupants, other than possibly those in the room of fire origin, to escape safely before escape routes become impassable.

Fire alarm systems L1, L2, L3 are the categories most commonly specified for commercial and public buildings in the UK, with the appropriate choice determined by a fire risk assessment rather than personal preference.

Fire Alarm System Types And BS 5839-1

It’s worth being clear on one distinction that trips people up regularly. BS 5839-1 is the code of practice covering fire detection and fire alarm system design, fire detection and fire alarm system installation, fire detection and fire alarm system commissioning, and fire detection and fire alarm system maintenance in non-domestic premises. It provides the framework your installer works to. The Regulatory Reform (Fire Safety) Order 2005 is legislation produced by the UK Government, outlining the legal responsibilities of responsible persons. BS 5839-1 is a guide to best practice.

The Regulatory Reform (Fire Safety) Order 2005 applies in England and Wales. In Scotland, the equivalent legislation is the Fire (Scotland) Act 2005 and the Fire Safety (Scotland) Regulations 2006. In Northern Ireland, it’s the Fire and Rescue Services (Northern Ireland) Order 2006 and the Fire Safety Regulations (Northern Ireland) 2010. All four nations use BS 5839-1 as guidance for best practice.

With the foundations in place, it’s worth looking at how the right system choice plays out across different building types. The principles are consistent, but the specific requirements vary considerably.  

Getting the specification wrong at the design stage creates problems that are expensive to fix once a system is installed. The correct category is determined through a fire risk assessment. This considers the building layout, occupancy type and fire risks, helping ensure the system meets the required level of protection.

A fire risk assessment is where your legal obligation and your practical needs come together. It’s not a bureaucratic exercise. It’s the document that tells a competent designer what your building needs and gives them the information to specify it correctly.

When choosing a company to install or maintain your fire alarm system, look for BAFE registration. It demonstrates third-party verified competence that goes beyond basic qualifications. We offer fire alarm maintenance to BS 5839-1 with nationwide coverage and full test certification.  

Fire alarm systems for residential buildings in the UK, commercial fire alarm systems and business fire alarm systems all follow the same fundamental principle: the right system is the one that matches your building’s risk, not simply the most familiar or the lowest-cost option available. Start with a fire risk assessment, work with a qualified installer and choose a system you can maintain properly for the long term.

A factory isn’t an office. A warehouse isn’t a shop. The fire risks are different, the legal duties are more layered, and the consequences of getting it wrong are far greater.

Industrial fires account for around a quarter of all workplace fires in England (the highest proportion of any commercial sector), and the hazards that drive that figure aren’t always the obvious ones. Safelincs has put together this guide to walk you through industrial fire safety from the ground up: the regulations you’re responsible for, the risks you face, the equipment that keeps people safe, and the practical steps that keep your site compliant. Whether you manage a manufacturing plant, oversee a warehouse or run a distribution facility, you’ll find what you need here.

What Is Industrial Fire Safety?

Industrial fire safety is the full set of measures, systems and procedures put in place to prevent fires and explosions in factories, warehouses, manufacturing plants and similar premises, limiting harm to people and property when a fire does occur.

What separates industrial fire safety from general workplace fire safety is the scale and variety of risk. An industrial site typically combines multiple hazard types at once: combustible raw materials, flammable liquids, electrical systems and battery storage systems under sustained load, high-temperature processes, heavy machinery, and large numbers of workers who may be spread across a complex layout. Throw in the possibility of explosive atmospheres and you have an environment that demands a more detailed, layered approach than most other buildings.

Industrial fire safety covers physical equipment (fire extinguishers, detection systems, emergency lighting and safety signs) alongside the strategy and management processes that keep risks under control: fire risk assessments, staff training, maintenance schedules and hot works permits. The responsible person for the premises, usually the employer or anyone with day-to-day control of the site, carries the legal duty to make sure all of that is in place. That’s a significant responsibility, and it’s one we can help you manage.

Understanding what causes industrial fires is the foundation of preventing them. The causes aren’t always the dramatic ones you might expect.  

Lithium-Ion Battery Fires

This is a fast-growing risk category in UK warehouses and industrial sites, and one we’re asked about often. Electric forklift trucks and other materials handling equipment rely on lithium-ion batteries, and so do newer additions to the warehouse floor: robotic picking and logistics equipment, and solar PV energy storage batteries installed on site to manage power. Any of these can enter thermal runaway, a self-sustaining internal reaction that generates its own heat and is extremely difficult to stop once it starts.

Storage brings its own version of the risk. Many warehouses and manufacturing sites hold lithium-ion batteries that aren’t currently in use: stock awaiting sale, spares for equipment, or units returned as faulty or of unknown condition. Any battery that’s damaged, swollen or has an uncertain history needs to go into quarantine, physically separated from other stock, until it can be assessed and removed by a competent contractor. Treating these batteries with the same care as the ones in active service is a key part of managing the risk.

Conventional suppression struggles against this type of fire at scale. In large-format installations, such as racking systems or energy storage units, the fire service’s own guidance is that water-based systems are generally used to limit the spread of fire between units rather than to extinguish it outright, and full suppression often can’t be relied on once thermal runaway is underway. Specialist media and containment strategies matter more here than in a single-device fire, and this makes prevention the most important line of defence: physical protection, careful charging practices, early detection and sound storage discipline all count for more than the choice of extinguisher once a large-format fire has taken hold.

Fire safety regulations for industrial premises aren’t a single document. They’re a layered framework, and understanding which parts apply to your site is the starting point for compliance.  

The Regulatory Reform (Fire Safety) Order 2005 (England and Wales)

The Regulatory Reform (Fire Safety) Order 2005 (the RRO or Fire Safety Order) is the primary piece of fire safety legislation in England and Wales. It applies to virtually all non-domestic premises, including factories and warehouses, and replaced a patchwork of around 70 older laws with a single, risk-assessment-based framework.

Under the Fire Safety Order, the employer is the responsible person in workplaces under their control. The responsible person must carry out a suitable and sufficient fire risk assessment, put general fire precautions in place, and review those precautions regularly. Where five or more people are employed, the assessment must be recorded in writing.

The Fire Safety Order has been strengthened in recent years. The Fire Safety Act 2021 clarified its scope in relation to building structures and flat entrance doors. Section 156 of the Building Safety Act 2022 introduced additional coordination duties for responsible persons in multi-occupied buildings.

Scotland operates under the Fire Safety (Scotland) Regulations 2006. Northern Ireland operates under the Fire Safety Regulations (Northern Ireland) 2010. The core obligations are broadly similar across all jurisdictions, but the responsible person should always refer to the legislation that applies to their specific location.

HSE Fire Safety Regulations: DSEAR and Explosive Atmospheres

For many industrial sites, the Dangerous Substances and Explosive Atmospheres Regulations 2002 (DSEAR) are just as important as the Fire Safety Order. Enforced by the Health and Safety Executive (HSE), DSEAR requires employers to assess the risks from fire, explosion and similar events arising from dangerous substances in the workplace, and to eliminate or reduce those risks as far as reasonably practicable.

DSEAR applies wherever dangerous substances are present, used, stored or produced. That scope is broader than many employers realise. It covers obvious high-risk environments, but it also catches woodworking shops where fine dust accumulates, food manufacturers producing flour or sugar dust, and warehouses storing aerosol products. If a flammable substance is present on your site in any meaningful quantity, DSEAR almost certainly applies.

A specific requirement of DSEAR is hazardous area classification: identifying and mapping zones where explosive atmospheres may form, and ensuring that only appropriately rated (ATEX-certified) equipment is used within them. Omitting a hazardous area classification from a DSEAR assessment is one of the most commonly cited compliance gaps, and a DSEAR assessment without one is generally considered incomplete by enforcement authorities.

Beyond the Fire Safety Order and DSEAR, many industrial processes are subject to additional controls. The Management of Health and Safety at Work Regulations 1999 require employers to assess all workplace risks. The Electricity at Work Regulations 1989 cover electrical safety. Hot works are covered by HSE guidance and industry body recommendations, and are frequently specified in insurance policies as requiring formal permit-to-work systems. Work process fire safety, meaning the specific risks arising from what your site actually does rather than just how it’s built, is a distinct element of any industrial fire risk assessment.

British Standards are codes of practice. They’re not laws themselves, but can be a good point of reference when creating your management processes.

The key standards for industrial fire safety are worth knowing:

Prevention is always better than response. Fire safety for factories and industrial sites is built on a small number of consistent principles, applied consistently.  

A fire risk assessment is the legal and practical foundation of fire safety on any industrial site. Under the Fire Safety Order, the responsible person must make sure a suitable and sufficient assessment is carried out, either by themselves if they’re competent to do so, or by appointing someone else to do it. In practice, most responsible persons bring in a professional fire risk assessor rather than tackling it themselves. It’s a specialist job, and getting it wrong can leave gaps that put people and the business at risk. The assessment must always be documented in full, whether on paper or digitally.

The government’s fire safety risk assessment guide for factories and warehouses, published under Article 50 of the Fire Safety Order, sets out a five-step process. Each step matters, and skipping any of them is likely to leave gaps that an enforcement officer, or a fire, will find.

The responsible person can carry out the assessment themselves if they have the competence to do so. For many industrial sites, the complexity of the risks makes it advisable to bring in a professional. We offer fire risk assessments carried out by experienced assessors who understand the specific demands of industrial and commercial environments, and who can produce documentation that stands up to scrutiny.  

A reliable fire alarm system gives people the time they need to get out safely. In industrial settings, choosing the right system is more involved than it might be for a small office: large floor areas, noisy environments, dusty atmospheres and complex layouts all affect how detection works and where devices need to be placed.  

  The three main types of fire alarm system each suit different premises.  

BS 5839-1:2025 is the current code of practice for fire detection and alarm systems in non-domestic premises. It defines three categories of system, each serving a different purpose.  

Category M systems are manual: there’s no automatic detection, and the alarm relies entirely on someone discovering a fire and operating a call point. These are rarely appropriate for industrial sites of any complexity.

Category L systems are designed to protect life, using automatic detection to provide early warning. Sub-categories run from L1 (automatic detection throughout the entire building) to L5 (detection in specific defined areas). Occupied industrial sites almost always require an L-category system.

Category P systems are designed to protect property. They’re appropriate for unoccupied warehouses or storage areas where the priority is alerting the fire service, not triggering an evacuation.

For many industrial sites, a combined approach works best: an L-category system to protect life during working hours, alongside a P-category system for property protection overnight. Many modern control panels can be configured to meet both requirements simultaneously. The right category for your premises should always be determined through your fire risk assessment.  

Keeping False Alarms Under Control

False alarms are a significant operational problem in industrial environments. Dust, steam, fumes and process heat can all trigger conventional smoke detectors, leading to unnecessary evacuations and, over time, a dangerous tendency for staff to treat alarms as background noise. Selecting the right detector type for each area is the key: heat detectors, aspirating systems, multi-sensor devices and beam detectors are all better suited than standard ionisation detectors in many industrial settings.

BS 5839-1 requires weekly test activations by the user, monthly checks and periodic inspection by a competent engineer. We offer fire alarm maintenance to BS 5839-1, with scheduled servicing and full documentation so you can demonstrate compliance at any time.  

Getting fire-fighting equipment right in an industrial setting means matching it to the actual fire risks on your site, and those risks are usually more varied than in a standard commercial building.  

UK fires are classified under BS EN 2 according to what’s burning. In a factory or warehouse, you may encounter several classes within the same site.  

It’s worth being clear on one point: electricity is not a fire class in UK classification. It’s a source of ignition and a continuing hazard, not a fuel. Extinguishers used near live electrical equipment must carry a dielectric test rating (typically 1,000 V at 1 metre), which confirms the agent won’t conduct current back to the user.

A note on lithium-ion battery fires: BS ISO 3941:2026, published in January 2026, introduced a new fire classification, Class L, specifically for lithium-ion battery fires. These fires involve thermal runaway, a self-sustaining internal reaction that generates its own heat, can re-ignite after apparent extinguishment, and releases toxic gases. Class L is not yet incorporated into the BS EN 3 extinguisher rating system, so extinguisher certification requirements haven’t changed, but fire risk assessments on sites with lithium-ion batteries should now identify this hazard explicitly under Class L.

With the fire classes in mind, here’s how the main extinguisher types map to industrial settings.  

Safelincs now sells extinguishers suitable for Class L fires. Class L (lithium-ion battery fires, BS ISO 3941:2026) has no single certified extinguishing agent. Our AVD media is the most suitable for this type of fire, or any of the extinguishers in our Lithium-Ion Battery Fire Extinguishers range.  

Managing fire safety risks in manufacturing is an ongoing process. The nature of manufacturing means that processes, materials, equipment and staffing change regularly, and each change has the potential to introduce new hazards or render existing controls ineffective.

Effective ongoing management requires documented procedures, clear responsibilities, maintained equipment and regular review. The responsible person should keep a fire safety log book recording inspections, tests, maintenance activities and training dates. We offer digital fire safety log books, free on the Safelincs website, as a straightforward way to keep those records accurate and accessible.

Check evacuation routes regularly to ensure they are clear and well maintained, and have regular fire drills to ensure all staff are clear on the process.

Some industrial sites require specialised solutions that go beyond standard extinguishers and detection systems. Fixed suppression systems may be appropriate for specific high-risk processes. Aspirating smoke detection can perform better than conventional detectors in environments where standard devices struggle. Beam detection covers large open spaces, such as high-bay warehouses, where conventional point detectors would require impractical numbers of devices. Emergency lighting and safety signage designed for complex, multi-level facilities are also part of the complete picture.

Whatever the specific demands of your site, the right starting point is always the same: a thorough, well-documented fire risk assessment that identifies the real risks and drives the selection of appropriate industrial fire protection measures.

Industrial Fire Safety: A Practical Summary

The essential elements of industrial fire protection, taken together, look like this.

• Carry out and record a fire risk assessment specific to your premises and processes.
• Install and maintain a fire alarm system appropriate to your site’s size, occupancy and risk profile, in line with BS 5839-1.
• Provide the right types and numbers of extinguishers in the correct positions, as determined by your risk assessment and BS 5306-8.
• Train your staff in fire safety procedures specific to your site.
• Implement a formal hot works permit system wherever welding, cutting or grinding takes place.
• Maintain clear escape routes, emergency lighting and exit signage at all times.
• Review all fire safety arrangements at least annually, and after any significant change to your site.

Industrial fire safety in manufacturing is not a compliance exercise you complete once and move on from. It’s a management discipline. Get the foundations right, keep them under review, and the risk to your people, your property and your business stays manageable.

Electricity is so woven into daily life that most of us have stopped noticing it. The lights, the laptop, the washing machine running in the background. It all just works. Until it doesn’t. Around 20,000 accidental fires in UK homes are caused by electricity every year, making electrical faults the leading cause of accidental dwelling fires. That’s not a distant statistic. It’s kitchens, living rooms, server cupboards and offices across the country.

This guide covers electrical fire safety from every angle (what causes electrical fires, the warning signs to watch for, how to respond if one starts and the equipment that gives you real protection). If you already know you need an extinguisher, our fire extinguishers for electrical equipment range covers every setting from the kitchen to the server room. If you want the full picture first, read on.

Here’s something that surprises most people: electricity itself doesn’t burn. It’s the cable coverings, plastic casings and electronic boards surrounding electrical equipment that ignite. The moment the power supply to that burning equipment stays live, it becomes a fire involving live electrical equipment.

That distinction matters enormously when it comes to responding correctly. Knowing what you’re actually dealing with changes everything about how you handle it.

In UK homes, 58% of electrical fires start in the kitchen, reflecting the concentration of high-risk appliances in cooking areas. White goods alone caused 1,140 electrical fires in England in 2024 (roughly three every day, according to figures from the Fire Industry Association based on Home Office data). Washing machines, tumble dryers and dishwashers are repeat offenders, particularly when left running unattended overnight.

Outside the kitchen, the causes of electrical fires tend to fall into a few predictable patterns.

Most electrical fires don’t arrive without warning. They give signals. The question is whether anyone pays attention to them.

Take any of these signs seriously and get a registered electrician to investigate. The cost of a callout is small compared to what an electrical fire costs.

Prevention is straightforward. Most electrical fires are avoidable, and most of the steps that prevent them are habits rather than investments.

These are the electrical fire safety tips that make a measurable difference. They cost nothing, take seconds and remove risks that cause thousands of fires a year.

Must-knows for electrical device safety

What do you use on an electrical fire at home or in a commercial premises?

CO2 extinguishers have traditionally been the first choice for fires involving electrical equipment. The gas doesn’t conduct electricity, and it evaporates completely on discharge, leaving no residue – making it ideal for sensitive equipment such as computers and servers. The limitation is that CO2 disperses quickly, so if the heat source remains, a fire can re-ignite once the gas has cleared.

Water mist extinguishers have significantly expanded the options available. Any water-based extinguisher that has passed the dielectric test to BS EN 3-7 is suitable for use on live electrical equipment up to 1000V, at a distance of at least one metre. The test applies 35,000 volts to verify that no electrical current travels back through the discharge stream to the user. Because de-ionised water cannot conduct electricity, and because the fine mist nozzle makes pooling almost impossible, these extinguishers are particularly safe for use near live electrical equipment.

Our UltraFire water mist extinguishers are independently tested and certified to this standard. They cover Class A fires (wood, paper, fabric), Class B fires (flammable liquids) and electrical risks – replacing the traditional water-and-CO2 combination with a single unit. Our eco-foam range is another strong choice for tackling all common fire risks.

Electrical fire prevention comes down to consistent habits and the right equipment. This checklist covers both.

For any premises, the right fire extinguisher for electrical equipment should be clearly mounted, accessible and in date. If you’d like help working out the right combination for your setting, our team is ready to advise. Browse our full fire extinguishers for electrical equipment range, or call us on 0800 612 6537.

Disclaimer

This guide is for general information only. It does not constitute legal, technical or professional fire safety advice. While we have taken care to ensure accuracy at the time of writing, fire safety regulations and product standards are subject to change. Always consult a qualified fire safety professional or registered electrician for advice specific to your premises and circumstances. In an emergency, call 999.