Replacing a fire alarm system – when is it worth upgrading an old system?

The control panel of an old system starts up, the detectors are in place and the monthly tests may pass as normal. At the same time, however, the system’s technical life cycle may have reached a stage where the availability of spare parts, maintainability or compatibility with current needs begins to decline. That is why it is worth assessing whether to upgrade a fire alarm system before it becomes a recurring maintenance or safety risk.

Upgrading a fire alarm system, sometimes also called modernisation, can mean a small technical update, a partial system renewal or the replacement of the entire fire alarm system. The scope of the work depends on the condition of the system, the intended use of the building, the availability of spare parts, how up to date the documentation is and what changes are expected in the building now or in the future.

What does upgrading a fire alarm system mean?

Upgrading a fire alarm system means developing an existing system technically and functionally so that it better meets current needs. In practice, this may involve, for example, replacing the fire alarm control panel, renewing detectors, updating software, reviewing alarm transmission, changing control outputs or extending the system to new areas.

An upgrade does not always mean dismantling the entire system and building it again from scratch. On some sites, replacing individual components or upgrading the system in a particular part of the building is enough. On other sites, the age of the system, recurring faults or incomplete documentation may make a comprehensive renewal the most sensible option. The right solution can usually only be found on the basis of a survey of the current situation.

Upgrading a system is different from routine maintenance. The purpose of maintenance is to keep the existing system in working order and to ensure that it operates in accordance with the manufacturer’s instructions and the needs of the building. An upgrade, on the other hand, involves a broader assessment of whether the system’s structure, technology and maintainability still serve the current and future needs of the building.

A well-planned upgrade is always based on an understanding of the whole. A fire alarm system is not a stand-alone device on a wall but part of the building’s fire safety solution. It may be connected to, for example, alarm transmission, the voice alarm system, smoke ventilation, fire doors, ventilation and building automation. When the system is upgraded, these connections and their effects must also be identified.

When is a partial upgrade enough?

A partial upgrade can be a good solution when the basic structure of the system still works, manufacturer support is available and spare parts can be obtained reliably. In such cases, it is possible, for example, to replace the fire alarm control panel while keeping some of the field devices, or to replace only the detectors in a particular area and update the related programming.

A partial upgrade may also be relevant when a limited change is made in the building. If, for example, the use of a space changes or a new section is added to the building, it may be possible to update only the detectors, zoning, control outputs and location information for that area. However, this requires that the old system can support the changes safely and that the whole remains clear from a maintenance and inspection point of view.

A partial solution must not result in the system becoming a hard-to-maintain combination of old and new technology. If compatibility is uncertain or the reliability of the old system has already clearly deteriorated, a more extensive system renewal may be a better and, in the long term, safer solution.

When is a more extensive system renewal needed?

A more extensive system renewal becomes relevant especially when the fire alarm system is technically obsolete, faults occur repeatedly or the supply of spare parts is uncertain. Incomplete documentation can also be a significant problem. If there are no up-to-date drawings, programming data, zone plans or maintenance history for the system, individual repairs and alterations can be slow and risky.

A comprehensive renewal is often a sensible option also when a building undergoes a major renovation or its use changes significantly. In such cases, patching up the old system may not be a long-lasting solution. A new or thoroughly upgraded system can be designed from the outset to match the current premises, risks and user needs.

A more extensive renewal can also be justified from a financial point of view. If an old system is constantly being repaired, individual repairs may look small on their own, but the total cost grows over time. At the same time, the risk grows that the system will not be reliable enough when needed or that repairing it will become even more difficult.

When should an old fire alarm system be assessed?

An old fire alarm system should be assessed at the latest when its maintenance shifts from preventive work to constantly reacting to faults. If the same faults keep recurring, repairs are needed more and more often or the same observations come up in maintenance year after year, it is a good idea to find out whether the system needs upgrading.

The age of the system is an important indicator, but it does not settle the matter on its own. A well-maintained system can work for a long time, while a system in demanding conditions may need action sooner. The operating environment, dust, humidity, temperature variations, changes to the premises and harsh conditions all affect the condition and maintainability of the system.

The availability of spare parts is one of the clearest signs. When manufacturer support weakens or certain components become harder to obtain, a single fault can become a wider problem. The reliability of a safety system should not depend on spare parts that are only occasionally available, recycled components or temporary solutions.

Changes in the use of the building can also make it necessary to assess the system. Office space may become production space, the amount of storage may increase or premises may be divided with new partition walls. Changes like these can affect the choice of detector types, detector positions, alarm zones, control outputs and location information.

Ask PAP Group to carry out a survey visit

What are the benefits of upgrading a fire alarm system?

The most important benefit of an upgrade is better reliability. A fire alarm system must work correctly even in a situation that everyone hopes will happen as rarely as possible. Up-to-date technology, clear documentation and the ability to maintain the system reliably support the fire safety of the whole building.

An upgrade can also reduce unnecessary disturbances and downtime. When the detectors, cabling, control panel and programming better match the actual conditions of the premises, the system works more consistently. This is particularly important on sites where interruptions to the building’s operations cause significant harm or where many people are present in the building.

Maintenance becomes easier when clear information about the system is available and spare parts can be obtained. Maintenance staff can locate faults faster, assess the necessary measures more precisely and document the changes made more reliably. At the same time, it is easier for the building’s responsible persons to monitor the condition of the system and plan future measures.

An upgrade can also improve compatibility with other systems. A fire alarm system may be part of a wider whole of safety and building services in which the different systems must work together as designed. The more control outputs, integrations and safety-related functions a building has, the more important it is that the fire alarm system is up to date and clearly documented.

Can a fire alarm system be replaced in stages?

On many sites, the upgrade can be carried out in stages. This can be a good option when use of the building cannot be interrupted or when the investment is to be spread over several phases. However, phased implementation requires careful planning so that the level of protection is maintained during the work and the end result forms a coherent whole.

In a phased upgrade, for example, the fire alarm control panel can be replaced first and the field devices upgraded later, one area at a time. Sometimes the work starts in the part of the building that is most prone to faults or where the use of the premises changes first. The essential point is that temporary solutions are controlled and that each phase is documented.

Not all sites are suited to phased implementation. If the compatibility of old and new technology is uncertain or the overall system would become difficult to manage, a complete renewal may be a clearer and safer solution. This should not be decided by guesswork but on the basis of a site-specific survey.

How is the need for an upgrade surveyed in practice?

A survey of the need for an upgrade should start with a review of the system’s current state. This looks at what kind of fire alarm control panel the site has, which field devices belong to the system, what control functions the system performs and how alarms are transmitted onwards. At the same time, it is established whether the system documentation is up to date and whether the drawings, zone plans and programming data match the actual situation.

It is also important to take the maintenance history into account in the survey. If maintenance has repeatedly found the same faults, elevated detector values, gaps in location information or problems with alarm devices and control outputs, these can build up an overall picture of the system’s condition. A single observation does not yet mean that the system should be replaced, but a recurring chain of observations gives strong grounds for looking at the need for an upgrade more broadly.

A good survey is not limited to technology alone. It also assesses the use of the building, future changes and the needs of users. If the premises have been altered, the number of occupants has grown or new activities have been introduced in the building, it is also worth checking whether the fire alarm system is still suitable. In this way, the upgrade can be planned according to real needs rather than on the basis of a single fault or component.

What should be avoided when upgrading a system?

When upgrading a system, it is best to avoid too narrow a perspective. If only a single faulty component is examined, the true condition of the whole may go unnoticed. In a safety system, the problem is not always only in the part that gives the fault warning; the underlying cause may be ageing technology, incomplete documentation, a changed operating environment or the system’s limited expandability.

Another thing to avoid is leaving documentation to the end of the project or neglecting it altogether. If changes are not clearly recorded, the next maintenance visit, fault-finding or inspection becomes more difficult. The quality of an upgrade often only becomes apparent later, in how easily the system can be maintained, repaired and developed over the following years.

A third risk relates to phasing. A phased upgrade can be a good solution, but only when the whole has been planned from the start. If upgrades are carried out one at a time without a common plan, the system can become technically difficult to manage. That is why a partial upgrade should also be planned as part of the system’s longer life cycle.

How a fire alarm system upgrade project progresses

An upgrade project begins with a survey of the current situation. The survey establishes the system’s age, equipment, documentation, maintenance history, fault history and the current use of the site. At the same time, it looks at whether the detectors, alarm zones and control outputs meet the real needs of the building.

After the survey, a plan is drawn up. A good plan sets out what will be upgraded, in what order the work will be done and how the use of the building will be taken into account during the work. In the design, it is important to ensure that the solution is technically sound, safe and sensible from the point of view of future maintenance as well.

At the installation stage, old components are replaced with new ones or upgraded according to the agreed scope. During the work, care must be taken to ensure that the building’s fire safety is never left in an uncontrolled state. Special sites may require temporary arrangements or more detailed phasing than usual.

During commissioning, the system’s detectors, alarms, control outputs, data transmission and integrations are tested in accordance with the plans. If a statutory fire alarm system has been replaced, extended or significantly altered, an inspection body carries out a verification inspection before it is taken into use (Act on Certain Fire Safety Equipment 191/2024). After commissioning, the system is subject to periodic inspections and regular maintenance.

Finally, the changes are documented. Documentation is not just a formality but part of the safe use and maintenance of the system. Up-to-date drawings, programming data, test reports, zone plans and maintenance records make future maintenance easier and support the work of the building’s responsible persons.

How much does replacing a fire alarm system cost?

The price of replacing or upgrading a fire alarm system cannot be estimated reliably without a site-specific survey. The costs depend on the size of the building, the scope of the system, the number of detectors, the control outputs required, the condition of the cabling and whether part of the old system can be retained.

On a smaller site, it may be a limited technical update. In a large or complex building, it may be an extensive system renewal in which the fire alarm system is linked to several other safety systems. That is why costs should be considered in relation to the system’s risks, life cycle, maintainability and future maintenance costs.

The cheapest solution is not always the best if it leaves the system difficult to maintain or pushes problems into the future. On the other hand, replacing the entire system is not always necessary if a safe and technically sensible partial upgrade can be carried out. A survey by an expert helps you choose a solution that is both technically justified and financially sensible.

Documentation, inspections and life cycle management

The technical condition of a fire alarm system, its maintenance, inspections, documentation and the competence of its users form a whole that has to work in everyday use. New technology alone is not enough if the use, maintenance and documentation of the system are not in order.

Up-to-date documentation makes maintenance, fault-finding and inspections easier. In practice, system documentation includes the maintenance programme, the log book, zone plans, user instructions, test reports and documents for alterations. When these are up to date, it is easier to assess the condition of the system and the changes made, including during periodic inspections. Read more about documentation in our article on the fire alarm system log book.

The building’s responsible persons should also review the fire alarm system regularly from a longer-term perspective. Is the system still fit for purpose? Are there recurring observations in the maintenance history? Is the documentation up to date? Has the use of the building changed? Answering these questions helps to identify the need for an upgrade before problems grow.

Proactive upgrading is usually more controlled than urgent replacement after a fault. When the matter is addressed in good time, there are more options, the schedule can be planned better and the building’s operations can be taken into account more safely.

PAP Group as your partner throughout the fire alarm system’s life cycle

At its best, upgrading a fire alarm system is part of long-term life cycle thinking. It is not just a question of whether to replace an individual device or repair a recurring fault, but of how the system serves the safety of the building today and in the years to come. PAP Group looks at the fire alarm system as a whole: its technical condition, maintainability, availability of spare parts, documentation, operating environment, inspection requirements and the building’s future needs for change. This makes it possible to assess whether a limited upgrade is enough or whether a more extensive system renewal is the safer and more cost-effective solution.

PAP Group’s strength lies in looking at a fire safety system not just as a need of the moment but over its entire life cycle. The same expertise covers design support, system upgrades, commissioning, testing, maintenance, documentation and ongoing upkeep. When the whole is managed by one competent partner, the system’s history, current state and future needs remain more visible. This makes decision-making easier, reduces surprises and supports the management of the building’s fire safety year after year.

If you are not sure whether a partial upgrade is enough for your system or whether a more extensive system renewal is due, it is worth assessing the situation before faults, spare parts problems or changed usage needs force decisions. PAP Group’s experts help you survey the current state of the system and plan a solution that is safe, technically justified and sensible in the long term. Get in touch and book a survey of your system’s current state.

Contact PAP Group’s experts

Frequently asked questions about replacing a fire alarm system

How do I know if a fire alarm system needs upgrading?

Upgrading a fire alarm system should be assessed if fault warnings become more frequent, spare parts become harder to obtain, the manufacturer’s technical support ends or the system documentation no longer reflects the current state of the site. The need for an upgrade may also arise when the use of the building changes or the system has to be repaired repeatedly.

How long is the service life of a fire alarm system?

The service life of a fire alarm system cannot be determined on the basis of age alone. The assessment must take into account the system’s technical condition, manufacturer support, availability of spare parts, maintenance history, operating environment and whether the system can meet the building’s current needs.

Can an old fire alarm system be upgraded, or does it have to be replaced completely?

Not all systems need to be replaced completely. On many sites, a partial upgrade can be carried out in which, for example, the fire alarm control panel, the detectors or certain parts of the system are replaced in stages. The final solution depends on the system’s condition, compatibility, documentation and future needs.

Can the system be used during the upgrade?

On most sites, the upgrade can be planned so that the building’s fire safety remains under control during the work. The approach depends on the nature of the site and the scope of the work. Managing downtime is particularly important on sites with continuous operations or where safety systems are especially critical.

Do upgrades require approval from the authorities?

The requirements depend on the site and the scope of the changes. Significant changes must be designed in accordance with the regulations in force and the site-specific requirements. Where necessary, the views of the local rescue authority and the role of the inspection body are also taken into account in the design. You can find more information on the requirements for and implementation of fire alarm systems (in Finnish) on the Tukes (Finnish Safety and Chemicals Agency) website.

How does an upgrade affect maintenance and upkeep?

After an upgrade, the system is usually easier to maintain, as the equipment is up to date, spare parts are more readily available and clearer information is available about the state of the system. At the same time, it is important to update the documentation, maintenance information and user instructions. An upgrade does not replace regular maintenance; it supports preventive upkeep.