National foreword

This British Standard is the UK implementation of EN 14972‑2:2026.

The UK participation in its preparation was entrusted to Technical Committee FSH/18/5, Watermist systems.

A list of organizations represented on this committee can be obtained on request to its committee manager.

Contractual and legal considerations

This publication has been prepared in good faith, however no representation, warranty, assurance or undertaking (express or implied) is or will be made, and no responsibility or liability is or will be accepted by BSI in relation to the adequacy, accuracy, completeness or reasonableness of this publication. All and any such responsibility and liability is expressly disclaimed to the full extent permitted by the law.

This publication is provided as is, and is to be used at the recipient’s own risk.

The recipient is advised to consider seeking professional guidance with respect to its use of this publication.

This publication is not intended to constitute a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2026.

This European Standard was approved by CEN on 15 June 2026.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and United Kingdom.

European foreword

This document (EN 14972‑2:2026) has been prepared by Technical Committee CEN/TC 191 “Fixed firefighting systems”, the secretariat of which is held by BSI.

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 2027, and conflicting national standards shall be withdrawn at the latest by January 2027.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

EN 14972, Fixed firefighting systems — Water mist systems, consists of the following parts:

Part 1: Design, installation, inspection and maintenance;
Part 2: Test protocol for shopping areas for automatic nozzle systems;
Part 3: Test protocol for office, school class rooms and hotel for automatic nozzle systems;
Part 4: Test protocol for non-storage occupancies for automatic nozzle systems;
Part 5: Test protocol for car garages for automatic nozzle systems;
Part 6: Test protocol for false floors and false ceilings for automatic nozzle systems;
Part 7: Test protocol for commercial low hazard occupancies for automatic nozzle systems;
Part 8: Test protocol for machinery in enclosures exceeding 260 m³ for open nozzle systems;
Part 9: Test protocol for machinery in enclosures not exceeding 260 m³ for open nozzle systems;
Part 10: Test protocol for atrium protection with sidewall nozzles for open nozzle systems;
Part 11: Test protocol for cable tunnels for open nozzle systems;
Part 12: Test protocol for commercial deep fat cooking fryers for manually activated open nozzle systems;
Part 13: Test protocol for wet benches and other similar processing equipment for open nozzle systems;
Part 14: Test protocol for combustion turbines in enclosures exceeding 260 m³ for open nozzle systems;
Part 15: Test protocol for combustion turbines in enclosures not exceeding 260 m³ for open nozzle systems;
Part 16: Test protocol for industrial oil cookers for open nozzle systems.
Part 17: Test protocol for residential occupancies for automatic nozzle systems.

Any feedback and questions on this document should be directed to the users’ national standards body. A complete listing of these bodies can be found on the CEN website.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United Kingdom.

1 Scope

This document specifies the evaluation of the fire performance of water mist systems for shopping areas, adjacent storage areas. This document is only applicable for horizontal, solid, flat ceilings with heights of 2,6 m and above.

This document does not cover storage with movable shelves or shelves.

2 Normative references

3 Terms and definitions

4 General requirements

4.1 General

4.2 Requirements

5 Fuel packages

5.1 General

5.2 Cardboard boxes and plastic cups

5.3 Storage configuration shelf storage

5.4 Storage configuration block storage

5.5 Ignition source

6 Test arrangement

6.1 Reference sprinkler requirements

6.2 Water mist system requirements

6.3 Sprinkler and automatic nozzle grid

7 Test equipment requirements

7.1

7.2

7.3

7.4

7.5

7.6

7.7

7.8

7.9

7.10

8 Instrumentation requirements

8.1 General

8.2 Temperature

8.3 Pressure

8.4 Time

9 Testing criteria

9.1 General

9.2 Fire tests

9.3 Evaluation of test results

10 Test report