EN 13403:2003

Ventilation for buildings - Non-metallic ducts - Ductwork made from insulation ductboards

This European Standard specifies the basic requirements and characteristics for ductwork made of insulation ductboards and used in ventilation and air conditioning systems of buildings subject to human occupancy. This standard does not specify the fire reaction classification for different types of ductboards.

Lüftung von Gebäuden - Nichtmetallische Luftleitungen - Luftleitungen aus Dämmplatten

Diese Europäische Norm legt grundsätzliche Anforderungen an und die technischen Kennwerte von Luftleitungen aus Dämmplatten fest, die in Lüftungs  und Klimaanlagen in Gebäuden für den Aufenthalt von Menschen verwendet werden.

Ventilation des bâtiments - Conduits non métalliques - Réseau de conduits en panneaux isolants de conduits

La présente Norme européenne spécifie les prescriptions et caractéristiques fondamentales des réseaux de conduits fabriqués avec des panneaux isolants de conduits et utilisés dans des systèmes de ventilation et de conditionnement d'air de bâtiments faisant l'objet d'une occupation humaine.

Prezračevanje stavb - Nekovinski kanali - Kanali iz izolacijskega materiala

General Information

• Status: Published
• Publication Date: 22-Apr-2003
• Withdrawal Date: 30-Oct-2003
• ICS: 91.140.30 - Ventilation and air-conditioning systems
• Technical Committee: CEN/TC 156 - Ventilation for buildings
• Drafting Committee: CEN/TC 156/WG 3 - Ductwork
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 16-May-2024
• Completion Date: 14-Apr-2025
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Ref Project: SIST EN 13403:2004 - Ventilation for buildings - Non-metallic ducts - Ductwork made from insulation ductboards

Overview

EN 13403:2003 - "Ventilation for buildings - Non‑metallic ducts - Ductwork made from insulation ductboards" (CEN) defines basic requirements and performance characteristics for ductwork fabricated from insulation ductboards used in building ventilation and air‑conditioning systems for human occupancy. The standard covers material, mechanical, airtightness, cleaning and durability requirements but does not itself assign reaction‑to‑fire classifications for ductboard types.

Key topics and technical requirements

• Material scope: ductboards made from mineral wool (MW), polyurethane/polyisocyanurate (PUR/PIR) and phenolic foam (PF) with facings that provide a vapour barrier.
• Particle erosion and emission: limits on particle release after cleaning/airflow testing - e.g., emission < 60 mg/m3 for particles > 0.5 mm and ≤ 4 mg/m3 for particles > 5.0 mm.
• Pressure resistance: ducts and connectors must withstand 2.5 × manufacturer’s rated positive pressure (minimum 200 Pa) without rupture (openings > 4 mm considered rupture).
• Air leakage / airtightness classes: class A, B, C defined by an air leakage factor fmax (values referenced to prEN 1507) and tabulated maximum leakage rates at specified test pressures.
• Dimensional & mechanical properties:
  • Board stiffness classified by flexural rigidity (EI) into R1–R5 classes (numerical thresholds provided in the standard).
  • Length/width/tolerance limits and thickness tolerances under load, plus optional dimensional stability requirements at elevated T and RH.
• Cleaning and durability: ductboards must resist 20 cleaning simulations (equivalent to 20 years: one cleaning/year) with no delamination, erosion or excessive particle emission; brushes must be non‑metallic.
• Water vapour resistance: outer facing minimum Zv ≥ 140 m2·h·Pa/mg to avoid internal condensation.
• Application restrictions: not suitable (without additional protection) for conveying solid particles, corrosive gases, outdoor/BURIED use, kitchen/lab smoke extraction, or above specified temperature/humidity limits (e.g., MW: max internal air temp 90 °C / external 60 °C; PUR/PIR/PF: max internal 65 °C).
• Fire: the standard requires reaction‑to‑fire classification to be determined per EN 13501‑1 or national fire regulations; it does not itself assign Euroclasses.

Applications and who uses it

EN 13403 is aimed at professionals involved in HVAC ductwork design, manufacture and maintenance:

• HVAC designers & building services engineers - specifying appropriate ductboard types, stiffness and airtightness for ventilation systems.
• Duct manufacturers - ensuring production tolerances, facings, water vapour resistance and testing regimes meet the standard.
• Installers & contractors - following assembly, support and cleaning-method guidance to meet leakage and durability requirements.
• Facility managers & maintenance teams - choosing compatible cleaning methods and lifecycle expectations.
• Regulatory authorities and specifiers - referencing clear performance and testing criteria for compliance checks.

Related standards

Key referenced standards include:

• EN 822, EN 823 (dimensional tests), EN 12086 (water vapour), EN 12236 (hangers/supports), ENV 12097 (cleaning/maintenance), EN 12667 / EN 12939 (thermal tests), EN 13162 / EN 13165 / EN 13166 (product specs for MW, PUR, PF), EN 13501‑1 (reaction to fire), EN ISO 11654 (acoustics), prEN 1507 (airtightness test).

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Lüftung von Gebäuden - Nichtmetallische Luftleitungen - Luftleitungen aus DämmplattenVentilation des bâtiments - Conduits non métalliques - Réseau de conduits en panneaux isolants de conduitsVentilation for buildings - Non-metallic ducts - Ductwork made from insulation ductboards91.140.30VLVWHPLVentilation and air-conditioningICS:Ta slovenski standard je istoveten z:EN 13403:2003SIST EN 13403:2004en01-februar-2004SIST EN 13403:2004SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13403April 2003ICS 91.140.30English versionVentilation for buildings - Non-metallic ducts - Ductwork madefrom insulation ductboardsVentilation des bâtiments - Conduits non métalliques -Réseau de conduits en panneaux isolants de conduitsLüftung von Gebäuden - Nichtmetallische Luftleitungen -Luftleitungen aus DämmplattenThis European Standard was approved by CEN on 17 January 2003.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2003 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13403:2003 ESIST EN 13403:2004

leakage factor and air tightness class.64.4Bulging and/or caving, air leakage.74.5Supports and hangers.74.6Facilities for cleaning.74.7Requirements for ductboards.75Application restrictions.96Test conditions.97Test methods.107.1Board stiffness.107.2Determination of particle emission.137.3Pressure test.147.4Microbial growth.158Marking, labelling and packaging.16Bibliography.17SIST EN 13403:2004

air ducts –Requirements forstrength andleakageSheet metalair ducts withrectangularcross section-DimensionsMeasurementof ductworksurface areaRequirementsforductworkcomponentsto facilitatemaintenanceCircularflanges -DimensionsDetermination ofmechanical energylossDimensions/requirements -Flexible ductsDuctwork made ofinsulation ductboardsFigure 1 - Position of EN 13403 in the field of mechanical building servicesAccording to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovakia, Spain, Sweden, Switzerland and the United Kingdom.SIST EN 13403:2004

leakage factor and air tightness classThe air leakage factor is given in Table 2 and the air leakage rates in Table 3 when tested in accordance withprEN 1507.Table 2 – Air tightness classification and air leakage factorAir Tightness classAir leakage factor (fmax)l/(sm2)A0,027 ´ Ps 0,65B0,009 ´ Ps 0,65C0,003 ´ Ps 0,65Table 3 - Air leakage ratesMaximum leakage, l/(s×m2) (surface area)Static pressuredifferentialPaDuctwork classClass AClass BClass C4001,320,440,14800-0,690,231000-0,800,271200-0,900,301500-1,10,36SIST EN 13403:2004
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