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Specimen guideline on fire protection requirements pertaining to ventilation systems

(Muster-Lüftungsanlagen-Richtlinie M-LüAR)

As at: 29.9.2005,

last amended by the decision of the Expert Committee on Construction Supervision of 3 September 2020

Contents

1 Scope 3

2 Definitions 3

3 Requirements pertaining to the fire behaviour of building materials 3

3.1 Fundamental requirements 3

3.2 Use of combustible materials 3

3.2.1 Ventilation ducts 3

3.2.2 Coatings, claddings and insulating layers 4

3.2.3 Localised and small components of ventilation systems 4

3.2.4 Other components and equipment for ventilation systems 4

4 Requirements pertaining to the fire resistance of ventilation ducts and shut-off devices in ventilation systems 4

4.1 Fundamental requirements 4

4.2 Application and implementation provision for use 5

5 Requirements pertaining to the installation of ventilation ducts 5

5.1 Selection and arrangement of the building components 5

5.1.1 Ventilation ducts at an increased risk of fire, explosion or contamination as well as chemical contamination 5

5.1.2 Openings of outside air and exhaust air ducts 6

5.1.3 Supply air systems 6

5.1.4 Recirculated air systems 6

5.1.5 Ventilation ducts and other installations 6

5.2 Laying of ventilation ducts 7

5.2.1 All duct sections 7

5.2.1.1 Load restriction 7

5.2.1.2 Routing through fire-resistant components for sealing off areas 7

5.2.1.3 Distances to combustible materials 8

5.2.2 Duct sections that must be fire-resistant 8

5.2.3 Outdoor ducts 8

5.2.4 Ventilation ducts above suspended ceilings 8

5.2.5 Fire protection in the roof void 8

6. Air conditioning equipment and ventilation plants 8

6.1 Air heaters 8

6.2 Filter media, contact humidifiers and droplet separators 9

6.3 Heat recovery systems 9

6.4 Ventilation plants for fans and air conditioning equipment 9

6.4.1 Basic requirement 9

6.4.2 Components, floors and openings of ventilation plants 9

6.4.3 Exits from ventilation plants 9

6.4.4 Ventilation ducts in ventilation plants 10

7 Ventilation systems for special uses 10

7.1 Ventilation systems for ventilation to and air extraction from dwellings as well as closed functional units of no more than 200 m² 10

7.2 Ventilation systems with fans for the ventilation of bathrooms and toilets (bathroom/toilet ventilation systems) 10

7.3 Ventilation of private kitchens 11

8 Exhaust air ducts from commercial or equivalent kitchens, with the exception of kitchens designed for cold food preparation 12

8.1 Materials used in and fire resistance of exhaust air ducts 12

8.2 Fans 12

8.3 Grease resistance of exhaust air ducts 12

8.4 Prevention of contamination; openings for cleaning purposes 12

9. Combined removal of air extracted from kitchens and flue gases from fireplaces 12

9.1 Fundamental requirements 12

9.2 Air extracted from kitchens and flue gases from fireplaces using gaseous fuels 13

9.3 Air extracted from kitchens and flue gases from cookers using solid fuels 13

10 Requirements pertaining to ventilation systems in special structures 13

Schematic diagrams 14

1 Scope
Communication from the Construction Ministers' Conference
Working group
Fachkommission Bauaufsicht

Communication from the Construction Ministers' Conference
Expert Commission
Building Control

Model Directive on fire protection requirements
on ventilation systems (Muster-Lüftungsanlagen-Richtlinie M-LüAR)

Version: 29 September 2005, as last amended by decision of the Expert Commission for Construction Supervision of 3 September 2020

Official Communication No. 2/DD.MM.2021

Legal information

Publisher:

German Institute for Building Technology (DIBt)

represented by the President
Dipl.-Ing. Gerhard Breitschaft

Kolonnenstrasse 30 B

10829 Berlin

Tel.: +49 30 787 30 – 0

Fax: +49 30 787 30 - 320

E-mail: dibt@dibt.de

www.dibt.de

Editorial director:

Dr.-Ing. Doris Kirchner

Notice of publication: The Official Communications of the DIBt communications appear irregular.

They are published on the internet at www.dibt.de and are available free of charge.

Published by the DIBt Model Ventilation Equipment Directive (M-LüAR) Version:
29 September 2005, as last amended by decision of the
Commission for Construction Supervision of 3 September 2020

Table of contents

1 Scope 6

2 Definitions 6

3 Requirements pertaining to the fire behaviour of building materials 6

3.1 Fundamental requirements 6

3.2 Use of combustible materials 6

3.2.1 Ventilation ducts 6

3.2.2 Coatings, claddings and insulating layers 7

3.2.3 Localised and small components of ventilation systems 7

3.2.4 Other components and equipment for ventilation systems 7

4 Requirements pertaining to the fire resistance of ventilation ducts and shut-off devices in ventilation systems 8

4.1 Fundamental requirements 8

4.2 Application and implementation provision for use 8

5 Requirements pertaining to the installation of ventilation ducts 9

5.1 Selection and arrangement of the building components 9

5.1.1 Ventilation ducts at an increased risk of fire, explosion or contamination as well as chemical contamination 9

5.1.2 Openings of outside air and exhaust air ducts 9

5.1.3 Supply air systems 10