EN 12239:2001

Ventilation for buildings - Air terminal devices - Aerodynamic testing and rating for displacement flow applications

This European Standard specifies methods for the laboratory aerodynamic testing and rating of low velocity air terminal devices for displacement flow applications, including the specification of suitable test facilities and measurement techniques.
The standard gives only tests for the assessment of characteristics of the air terminal devices under non-isothermal conditions.
This standard applies to Class IV air terminal devices as defined in EN 12238.

Lüftung von Gebäuden - Luftdurchlässe - Aerodynamische Prüfung und Bewertung für Anwendung bei Verdrängungsströmung

Diese Europäische Norm legt Verfahren für die aerodynamische Laborprüfung und Bewertung von Niedergeschwindigkeit-Luftdurchlässen für Anwendung bei Verdrängungsströmung sowie geeignete Prüfeinrichtungen und Meßverfahren fest. Die Norm legt nur Prüfungen für die Einschätzung der Kenngrößen der Luftdurchlässe unter isothermen Bedingungen fest.

Ventilation des bâtiments - Bouches d'air - Essais aérodynamiques et caractérisation pour applications déplacement d'air

La présente Norme européenne spécifie les méthodes d'essais aérodynamiques et de caractérisation, en laboratoire, des bouches d'air à faibles vitesses utilisées dans des applications à déplacement d'air, y compris la spécification de dispositifs d'essai et de techniques de mesure appropriés.
La présente norme ne traite que des essais permettant d'évaluer les caractéristiques des bouches d'air dans des conditions non isothermes.
La présente norme s'applique aux bouches d'air de classe IV, telles que définies dans l'2238.

Prezračevanje stavb - Naprave za razvod zraka - Aerodinamično preskušanje in ocenitev zračnega strujanja zraka

General Information

• Status: Published
• Publication Date: 28-Aug-2001
• Withdrawal Date: 27-Feb-2002
• ICS: 91.140.30 - Ventilation and air-conditioning systems
• Technical Committee: CEN/TC 156 - Ventilation for buildings
• Drafting Committee: CEN/TC 156/WG 4 - Air terminal devices
• 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 12239:2001 - Ventilation for buildings - Air terminal devices - Aerodynamic testing and rating for displacement flow applications

Relations

• Parent: EN 12238:2001 - Ventilation for buildings - Air terminal devices - Aerodynamic testing and rating for mixed flow application
• Effective Date: 22-Dec-2008

Overview

EN 12239:2001 - "Ventilation for buildings - Air terminal devices - Aerodynamic testing and rating for displacement flow applications" (CEN) defines laboratory methods for aerodynamic testing and rating of low-velocity air terminal devices used in displacement flow (thermally controlled) ventilation. The standard specifies suitable test facilities, instrumentation and measurement techniques for performance assessment under non‑isothermal conditions and applies to Class IV air terminal devices as defined in EN 12238.

Key topics and technical requirements

• Scope & applicability: Laboratory aerodynamic tests and rating for displacement flow air terminal devices; tests are limited to non‑isothermal conditions and Class IV devices.
• Device types & categories: Defines Type 1 (horizontal discharge), Type 2 (floor-mounted vertical), and Type 3 (ceiling-mounted) devices and categories with/without internal induction.
• Test installations: Two installations - D (duct connection) and P (plenum connection) - with detailed requirements:
  • Duct connection: connecting duct equal to nominal size, straight length ≥ 20·De or flow straightener ≥ 3·De; static pressure plane at 1.5·De upstream.
  • Plenum: plenum velocity ≤ 1 m/s at 2·De; static pressure measured where velocity < 1 m/s.
• Measurements & outputs:
  • Isovel mapping (loci of equal mean velocity) to determine length/width/height of specified isovel. Comfort devices: isovel at v = 0.20 m/s; industrial devices: v = 0.30 m/s.
  • Pressure loss (static, dynamic, total) and induction rate i = qi / qp (internally induced flow / primary flow).
  • Temperature measurements (primary, induced, total) and tracer gas or zero pressure-difference methods for induction rate determination.
  • Instruments for low-velocity measurement must meet prEN 13182 requirements.
• Test room & conditions: Enclosed room with specified minimum dimensions and temperature uniformity; primary temperature difference typically presented at 3 K (cooling), with an option for 6 K.
• Procedure details: Tests at a minimum of four flow rates across working range; mean velocity measured for at least 3 minutes; uncertainty considerations specified.

Applications

• Product aerodynamic performance evaluation and rating for displacement ventilation terminals
• HVAC equipment manufacturers for design verification and product data
• Independent test laboratories executing standardized aerodynamic tests
• Building services engineers and specifiers selecting terminal devices for low‑velocity displacement ventilation systems
• Certification bodies assessing compliance and performance claims

Who should use this standard

• HVAC manufacturers, test labs, product certification bodies, design engineers, and regulatory authorities involved in ventilation system design, testing and specification.

Related standards

• EN 12238 (air terminal devices - mixed flow applications)
• prEN 13182 (instrumentation for low air velocity)
• CR 12792 (symbols & terminology)
• ISO 5167-1, ISO 5221 (flow measurement methods)

Keywords: EN 12239:2001, ventilation for buildings, air terminal devices, displacement flow, aerodynamic testing, induction rate, isovel, non-isothermal testing, air terminal rating.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Lüftung von Gebäuden - Luftdurchlässe - Aerodynamische Prüfung und Bewertung für Anwendung bei VerdrängungsströmungVentilation des bâtiments - Bouches d'air - Essais aérodynamiques et caractérisation pour applications déplacement d'airVentilation for buildings - Air terminal devices - Aerodynamic testing and rating for displacement flow applications91.140.30VLVWHPLVentilation and air-conditioningICS:Ta slovenski standard je istoveten z:EN 12239:2001SIST EN 12239:2001en01-december-2001SIST EN 12239:2001SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12239August 2001ICS 91.140.30English versionVentilation for buildings - Air terminal devices - Aerodynamictesting and rating for displacement flow applicationsVentilation des bâtiments - Bouches d'air - Essaisaérodynamiques et caractérisation pour applicationsdéplacement d'airLüftung von Gebäuden - Luftdurchlässe - AerodynamischePrüfung und Bewertung für Anwendung beiVerdrängungsströmungThis European Standard was approved by CEN on 22 June 2001.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,Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12239:2001 ESIST EN 12239:2001

rthe average of at least five measurements of the air temperature at a height of 1,1 m from the floor andoutside the area directly influenced from the device3.1.9primary air temperature difference pthe algebraic difference of the primary air temperature and the reference air temperature of the occupiedzone3.1.10isovelthe loci of points of equal mean velocity3.1.11length of the specified isovel avthe maximum horizontal distance from the air terminal device (or wall) to the rectangle circumscribing thespecified isovel , independent of the distance from the floor as shown in Figure 43.1.12width of the specified isovel bvthe maximum width of the rectangle circumscribing the specified isovel perpendicular to av, independentof the distance from the floor as shown in Figure 43.1.13height of the specified isovel hvthe maximum height above floor of the specified isovel as shown in Figure 53.1.14induction rate ithe ratio of the internally induced air flow rate and primary air flow rate
i = qi / qpSIST EN 12239:2001
A d2mDhHydraulic diameter
perimeter4AdmdDiametermhvHeight of isovelmhRHeight of test room or installationmiInduction rate-lRLength of test room or installationmpsaAbsolute static pressurePapaAtmospheric pressurePapsStatic pressure or static gauge pressure (psa - pa)PaptaStagnation (or absolute total) pressurePaSIST EN 12239:2001
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