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What is EN 12845? It's the standard for automatic sprinkler systems.

Automatic sprinkler systems, It is one of the most effective active fire protection systems for controlling a fire in its early stages. The basic European standard defines the design, installation and maintenance of these systems. EN 12845’'is. Standard, EN 12845:2015+A2:2026 Updated (April 2026). This article summarizes the scope of the standard, the hazard classes, and its importance in terms of periodic inspection.

What is EN 12845 and what does it cover?

The full title of EN 12845 is ’Fixed fire extinguishing systems — Automatic sprinkler systems — Design, installation and maintenance.”It covers the entire life cycle of a sprinkler system, from identifying the structures and areas to be protected, to water sources, hydraulic design criteria, and maintenance requirements. Its main components are:

  • Contract planning and documentation
  • Scope of sprinkler protection (structures and areas to be protected)
  • Hazard classification (depending on intended use and fire load)
  • Hydraulic design criteria
  • Water resources and pumps
  • Maintenance and keeping the system operational.

Hazard classes: LH, OH, and HH

EN 12845 classifies protected areas according to their fire hazard: Light Hazard (LH), Ordinary Hazard (OH) And High Hazard (HH); Storage arrangements are also considered separately. This class directly determines the design density of the system and water supply requirements — therefore, whether the facility is designed according to its class is a critical check during inspection.

What has changed with EN 12845:2015+A2:2026?

Current edition EN 12845:2015+A2:2026’'is; A2 amendment by CEN January 19, 2026’It was approved in (publication April 2026) and replaced the A1:2019 edition. A notable change: the standard is now “life safety”It does not use the term "(life safety)"; the requirements within this scope define additional measures that increase the reliability and accessibility of the system. Annex F gathered under.

Importance in terms of periodic inspection and maintenance.

EN 12845 requires not only that the system be correctly designed and installed, to be kept in working order This also requires. The topics evaluated by our authorized engineers during the periodic inspection of sprinkler systems are:

  • Water source and fire pumps flow-pressure performance
  • Valve locations, monitoring (supervision) and alarm devices.
  • Condition, unobstruction, and suitability of sprinkler heads.
  • Suitability of the facility to its hazard class and the impact of changing usage.
  • Pipework, hangers, and freezing/corrosion risks.

AES Innovation provides periodic inspections of sprinkler and other fire protection systems. authorized engineers It operates in accordance with relevant standards and legislation. Our related services include:

Frequently Asked Questions

What is EN 12845?

EN 12845 is a European standard defining the design, installation, and maintenance of automatic sprinkler systems within fixed fire extinguishing systems. The current edition is EN 12845:2015+A2:2026 (April 2026).

What are the sprinkler hazard classes?

EN 12845 classifies areas according to fire hazard as Low Hazard (LH), Moderate Hazard (OH), and High Hazard (HH); storage arrangements are also considered separately. This classification determines the design density of the system and the water source.

What has changed with EN 12845 A2:2026?

The A2 amendment was approved by CEN on 19 January 2026 (publication April 2026) and replaced A1:2019. The standard no longer uses the term 'life safety'; the relevant requirements are grouped under Appendix F, which enhances system reliability.

Who performs the periodic inspection of the sprinkler system?

Periodic inspections of sprinkler and fire extinguishing systems are carried out at AES Innovation by authorized engineers in accordance with relevant standards and regulations; pumps, water supply, valves, alarms, and sprinkler heads are evaluated.

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