Ventilation for buildings - Air terminal devices - Aerodynamic testing of damper and valves

This European Standard specifies methods for the testing and rating of dampers and valves used in air distribution systems with pressure differences up to 2 000 Pa.
The tests incorporated in this European Standard are:
a)   leakage past a closed damper or valve (for classification see Annex C);
b)   casing leakage (for classification see Annex C);
c)   flow rate/pressure requirement characteristics;
d)   torque: (see Annex A);
e)   thermal transmittance: (see Annex B).
The acoustic testing of dampers and valves is not included in this European Standard.
The tests specified above apply to the following:
f)   measurement of leakage past a closed damper or valve;
g)   measurement of casing leakage;
h)   determination of flow rate and pressure requirements;
i)   measurement of torque characteristics (see Annex A);
j)   measurement of thermal transfer characteristics to determine insulation properties (see Annex B).
NOTE   Certain aspects of the dynamic performance of dampers or valves are dependent upon the air distribution system to which they are connected and are, therefore, difficult to measure in isolation. Such considerations have led to the omission of these aspects of the dynamic performance measurements from this European Standard. Also, in common with other air distribution components, the results from tests carried out in accordance with this European Standard may not be directly applicable if the damper or valve is situated in an area of non-uniform flow.

Lüftung von Gebäuden - Geräte des Luftverteilungssystems - Aerodynamische Prüfungen von Drossel- und Absperrelementen

Diese Europäische Norm legt Verfahren zur Prüfung und Bewertung von Drossel- und Absperrelementen fest, die in Luftverteilungssystemen mit Differenzdrücken bis zu 2 000 Pa verwendet werden.
Die vorliegende Europäische Norm umfasst die folgenden Prüfungen:
a) Leckage bei einem geschlossenen Drossel- bzw. Absperrelement (Klassifizierung siehe Anhang C);
b) Gehäuseleckage (Klassifizierung siehe Anhang C);
c) Typische Anforderungen an Volumenstrom/Druck;
d) Drehmoment (siehe Anhang A);
e) Wärmedurchgang (siehe Anhang B).
Die akustische Prüfung von Drossel- und Absperrelementen ist nicht in dieser Norm enthalten.
Die vorstehend festgelegten Prüfungen gelten für Folgendes:
f) Messung der Leckage bei einem geschlossenen Drossel- bzw. Absperrelement;
g) Messung der Gehäuseleckage;
h) Bestimmung der Anforderungen an Volumenstrom und Druck;
i) Messung des Drehmomentverlaufs (siehe Anhang A);
j) Messung der Wärmeübertragung zur Bestimmung der Wärmedämmungseigenschaften (siehe Anhang B).
ANMERKUNG Bestimmte Aspekte der dynamischen Leistung von Drossel- bzw. Absperrelementen sind abhängig vom Luftverteilungssystem, in das sie eingebunden sind, weshalb es schwierig ist, sie getrennt zu messen. Solche Erwägungen haben dazu geführt, dass diese Aspekte der Messung der dynamischen Leistung nicht in die vorliegende Europäische Norm aufgenommen wurden. Wie auch bei anderen Luftverteilungskomponenten sind die Ergebnisse von Prüfungen nach dieser Europäischen Norm möglicherweise nicht direkt anwendbar, wenn das Drossel- bzw. Absperrelement in einem Bereich ungleichmäßiger Strömung angeordnet ist.

Ventilation des bâtiments - Bouches d'air - Essais aérodynamiques des registres et clapets

La présente Norme européenne spécifie les méthodes d'essai et la classification des registres et des clapets utilisés dans les systèmes de distribution d'air avec des différences de pressions jusqu'à 2 000 Pa.
Les essais faisant partie de la présente Norme européenne sont :
a)   fuite à travers un registre ou un clapet fermé (pour la classification voir Annexe C) ;
b)   étanchéité de l'enveloppe (pour la classification voir Annexe C) ;
c)   caractéristiques des prescriptions débit/pression ;
d)   couple (voir Annexe A) ;
e)   transmission thermique (voir Annexe B).
Les essais acoustiques des registres et des clapets ne font pas partie de la présente Norme européenne.
Les essais cités ci-dessus s'appliquent pour :
f)   le mesurage d'une fuite à travers un registre ou un clapet fermé ;
g)   le mesurage de l'étanchéité de l'enveloppe ;
h)   la détermination des prescriptions de débit et de pression ;
i)   le mesurage des caractéristiques de couple (voir Annexe A) ;
j)   le mesurage des caractéristiques de transfert thermique afin de déterminer les propriétés d'isolation (voir Annexe B).
NOTE   Certains aspects des performances dynamiques des registres ou clapets sont dépendants du système de distribution d'air auquel ils sont raccordés et sont, par conséquent, difficiles à mesurer isolément. De telles considérations ont amené à omettre de la présente Norme européenne ces aspects de mesurage de la performance dynamique. De plus, comme pour d'autres composants de distribution d'air, les résultats d'essai effectués conformément à la présente Norme européenne peuvent ne pas être directement applicables si le registre ou le clapet est placé dans une zone d'écoulement non uniforme.

Prezračevanje stavb - Naprave za dovod in odvod zraka - Aerodinamično preskušanje dušilnikov in loput

Standard EN 1751 določa metode za preskušanje in ocenjevanje dušilnikov in loput, ki se uporabljajo v sistemih za dovod zraka z razlikami v tlaku do 2000 Pa. Preskusi, vključeni v ta evropski standard, so: a) puščanje skozi zaprt dušilnik ali loputo (glej Dodatek C za klasifikacijo); b) puščanje ohišja (glej Dodatek C za klasifikacijo); c) stopnja pretoka/zahteve glede tlaka; d) navor: (glej Dodatek A); e) toplotna prehodnost: (glej dodatek B). Akustični preizkusi dušilnikov in loput niso zajeti v tem standardu. Zgoraj navedeni preizkusi veljajo za naslednje: a) merjenje puščanja skozi zaprt dušilnik ali loputo; b) merjenje puščanja ohišja; c) določevanje stopnje pretoka in zahtev glede tlaka; d) merjenje navora (glej Dodatek A); e) merjenje toplotne prehodnosti za določevanje izolacijskih lastnosti (glej Dodatek B).

General Information

Status
Withdrawn
Publication Date
28-Jan-2014
Withdrawal Date
13-Apr-2025
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
9960 - Withdrawal effective - Withdrawal
Start Date
22-May-2024
Completion Date
14-Apr-2025
Ref Project
SIST EN 1751:2014 - Ventilation for buildings - Air terminal devices - Aerodynamic testing of damper and valves

Relations

Replaces
EN 1751:1998 - Ventilation for buildings - Air terminal devices - Aerodynamic testing of dampers and valves
Effective Date
02-Aug-2010
Replaced By
EN 1751:2024 - Ventilation for buildings - Air terminal devices - Aerodynamic testing of damper and valves
Effective Date
18-Jan-2023

Frequently Asked Questions

EN 1751:2014 is a standard published by the European Committee for Standardization (CEN). Its full title is "Ventilation for buildings - Air terminal devices - Aerodynamic testing of damper and valves". This standard covers: This European Standard specifies methods for the testing and rating of dampers and valves used in air distribution systems with pressure differences up to 2 000 Pa. The tests incorporated in this European Standard are: a) leakage past a closed damper or valve (for classification see Annex C); b) casing leakage (for classification see Annex C); c) flow rate/pressure requirement characteristics; d) torque: (see Annex A); e) thermal transmittance: (see Annex B). The acoustic testing of dampers and valves is not included in this European Standard. The tests specified above apply to the following: f) measurement of leakage past a closed damper or valve; g) measurement of casing leakage; h) determination of flow rate and pressure requirements; i) measurement of torque characteristics (see Annex A); j) measurement of thermal transfer characteristics to determine insulation properties (see Annex B). NOTE Certain aspects of the dynamic performance of dampers or valves are dependent upon the air distribution system to which they are connected and are, therefore, difficult to measure in isolation. Such considerations have led to the omission of these aspects of the dynamic performance measurements from this European Standard. Also, in common with other air distribution components, the results from tests carried out in accordance with this European Standard may not be directly applicable if the damper or valve is situated in an area of non-uniform flow.

This European Standard specifies methods for the testing and rating of dampers and valves used in air distribution systems with pressure differences up to 2 000 Pa. The tests incorporated in this European Standard are: a) leakage past a closed damper or valve (for classification see Annex C); b) casing leakage (for classification see Annex C); c) flow rate/pressure requirement characteristics; d) torque: (see Annex A); e) thermal transmittance: (see Annex B). The acoustic testing of dampers and valves is not included in this European Standard. The tests specified above apply to the following: f) measurement of leakage past a closed damper or valve; g) measurement of casing leakage; h) determination of flow rate and pressure requirements; i) measurement of torque characteristics (see Annex A); j) measurement of thermal transfer characteristics to determine insulation properties (see Annex B). NOTE Certain aspects of the dynamic performance of dampers or valves are dependent upon the air distribution system to which they are connected and are, therefore, difficult to measure in isolation. Such considerations have led to the omission of these aspects of the dynamic performance measurements from this European Standard. Also, in common with other air distribution components, the results from tests carried out in accordance with this European Standard may not be directly applicable if the damper or valve is situated in an area of non-uniform flow.

EN 1751:2014 is classified under the following ICS (International Classification for Standards) categories: 91.140.30 - Ventilation and air-conditioning systems. The ICS classification helps identify the subject area and facilitates finding related standards.

EN 1751:2014 has the following relationships with other standards: It is inter standard links to EN 1751:1998, EN 1751:2024. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

You can purchase EN 1751:2014 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.

Standards Content (Sample)


2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.LþQRLüftung von Gebäuden - Komponenten des Luftverteilersystems - Aerodynamische Prüfung von Drossel- und AbsperrelementenVentilation des batiments - Bouches d'air - Essais aérodynamiques des registres et clapetsVentilation for buildings - Air terminal devices - Aerodynamic testing of damper and valves91.140.30VLVWHPLVentilation and air-conditioningICS:Ta slovenski standard je istoveten z:EN 1751:2014SIST EN 1751:2014en,fr,de01-julij-2014SIST EN 1751:2014SLOVENSKI
STANDARDSIST EN 1751:19991DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1751
January 2014 ICS 91.140.30 Supersedes EN 1751:1998English Version
Ventilation for buildings - Air terminal devices - Aerodynamic testing of damper and valves
Ventilation des bâtiments - Bouches d'air - Essais aérodynamiques des registres et clapets
Lüftung von Gebäuden - Geräte des Luftverteilungssystems - Aerodynamische Prüfungen von Drossel- und Absperrelementen This European Standard was approved by CEN on 9 November 2013.
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, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1751:2014 ESIST EN 1751:2014

Foreword .3 1 Scope .4 2 Normative references .4 3 Terms, definitions, symbols and suffixes .5 3.1 Terms and definitions .5 3.2 Symbols .5 3.3 Suffixes .6 4 Instrumentation .6 4.1 Air flow rate measurement .6 4.2 Pressure measurement .7 4.3 Temperature measurement .7 5 Leakage tests .7 5.1 General .7 5.2 Damper and valve leakage .7 5.3 Casing leakage .8 6 Flow rate and pressure tests .8 6.1 Ducted method .8 6.2 Chamber method . 10 6.2.1 General . 10 6.2.2 Size relationship . 10 6.2.3 Tests . 10 6.3 Test report . 10 Annex A (informative)
Mechanical testing of dampers and valves . 17 A.1 Scope . 17 A.2 Instrumentation: Torque measurement . 17 A.3 Pressure test to determine limiting value for structural stability . 17 A.4 Torque tests to determine the torque required to operate the damper or valve and the limiting value to avoid structural damage . 18 Annex B (informative)
Thermal transmittance through dampers and valves . 20 B.1 Introduction . 20 B.2 Scope . 20 B.3 Thermal loss test using a substitution method . 20 Annex C (normative)
Classification of a damper or valve leakage . 23 C.1 Scope . 23 C.2 Leakage through closed blade(s). 23 C.3 Casing leakage . 23 Annex D (informative)
Effect of Duct Configuration on Pressure Loss Coefficient . 26 D.1 General . 26 D.2 Application of correction factor . 28 Bibliography . 29
Air density kg„m-3
Pressure loss coefficient - 3.3 Suffixes The following suffixes shall be used with the symbols given in Table 1. 1 is the inlet of the damper or valve under test; 2 is the outlet of the damper or valve under test; u is the measuring point upstream of the flow meter; n is the value at a selected point of the flow rate/static pressure curve. 4 Instrumentation 4.1 Air flow rate measurement 4.1.1 The air flow rate shall be measured using instruments in accordance with EN ISO 5167-1, EN ISO 5167-2, EN ISO 5167-3 and EN ISO 5167-4, or other instruments which have equivalent calibrated performance. 4.1.2 Air flow meters shall have a minimum calibration accuracy of ± 2,5 % over the whole range. NOTE If necessary, flow meters can be calibrated in situ by means of the Pitot static tube traverse technique described in ISO 3966. 4.1.3 Flow meters shall be checked at intervals as appropriate but not exceeding 12 months. This check can take the form of one of the following: a) a dimensional check for all flow meters not requiring calibration; b) a calibration over their full range using the original method employed for the initial calibration of meters calibrated in situ; c) a check against a flow meter which meets flow meter specifications according to EN ISO 5167-1, EN ISO 5167-2, EN ISO 5167-3 or EN ISO 5167-4 as appropriate. 4.1.4 Leakage air flow meters shall have a minimum indicated accuracy according to the ranges in Table 2. Table 2 — Accuracy of leakage air flow meters Range l„s−1 Accuracy of measurement Up to and including 0,018 ± 0,000 9 l„s−1 More than 0,018 ± 5 % SIST EN 1751:2014
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SIST EN 1751:2014 표준은 건물의 환기 시스템에서 공기 분배 장치에 대한 성능 평가를 위한 중요한 기준을 제공합니다. 이 표준은 최대 2,000 Pa의 압력 차를 견딜 수 있는 댐퍼와 밸브의 테스트 및 등급 매기는 방법을 명확히 규정하고 있습니다. 주요 강점 중 하나는 다양한 테스트 항목의 포괄성입니다. 이 표준은 폐쇄된 댐퍼 또는 밸브를 통한 누출 측정, 케이스 누출, 유량/압력 요구 특성, 토크 및 열전도율 측정 등을 포함하고 있어, 실질적인 공기 배분 저항과 성능을 정확하게 평가할 수 있습니다. 각각의 테스트는 특히 공기 분배 시스템에서의 실제 성능을 반영하도록 설계되었습니다. 또한, 이 표준은 열전도 특성을 통한 절연 성능의 평가까지 다루고 있어, 에너지 효율성을 고려하는 데 중요한 기준이 될 수 있습니다. Annex A와 Annex B를 통한 추가 정보를 제공함으로써, 사용자들이 깊이 있는 이해를 기반으로 최적의 선택을 할 수 있도록 돕고 있습니다. 하지만, 비록 음향 테스트는 포함되어 있지 않지만, 표준은 댐퍼와 밸브의 역동적 성능에 대한 다른 요소의 측정이 어렵다는 점을 명확히 하여, 사용자가 이 표준의 적용을 이해하도록 돕습니다. 특히, 비균일한 흐름이 있는 지역에서 댐퍼나 밸브가 설치된 경우, 테스트 결과가 직접 적용되지 않을 수 있다는 점도 주목할 필요가 있습니다. 전반적으로 SIST EN 1751:2014 표준은 공기 분배 시스템의 댐퍼 및 밸브의 성능을 체계적이고 과학적으로 평가할 수 있는 유용한 기준을 제공합니다. 이는 관련 업계에서 업그레이드된 성능 기준을 마련하는 데 기여하며, 건물의 환기 시스템 설계 및 운영에 있어 필수적인 요소로 자리 잡고 있습니다.

La norme EN 1751:2014 est un document européen essentiel qui spécifie les méthodes de test et de classification pour les dispositifs de régulation d’air, tels que les damper et les vannes, utilisés dans les systèmes de distribution d'air avec des différences de pression allant jusqu'à 2 000 Pa. Son champ d'application est particulièrement pertinent pour les professionnels de la ventilation en raison de l'universalité des tests qu'elle propose. Parmi les forces notables de cette norme, on trouve la exhaustivité des tests inclus, qui couvrent à la fois les fuites à travers une vanne ou un damper fermé, ainsi que les fuites à l’enceinte. De plus, elle aborde des caractéristiques cruciales telles que le débit d'air, les exigences de pression, le couple et la transmittance thermique. Ces tests sont indispensables pour évaluer l’efficacité et la performance des dispositifs dans les systèmes de ventilation modernes. Un autre point fort de la norme est sa clarté pédagogique. Les annexes fournissent des classifications utiles qui permettent une meilleure compréhension des résultats des tests. Par exemple, l'Annexe A dégage des critères pour la mesure des caractéristiques de couple, tandis que l'Annexe B traite des propriétés d'isolation thermique, ce qui est essentiel pour garantir une utilisation efficace de l'énergie dans la ventilation des bâtiments. Cependant, il est important de noter que la norme exclut les tests acoustiques des dampers et des vannes, ce qui pourrait être perçu comme une lacune pour certains utilisateurs. De plus, certains aspects de la performance dynamique des dispositifs dépendent des systèmes de distribution d'air, rendant difficile la mesure indépendante de ces éléments. Cette complexité est bien soulignée dans le document, permettant ainsi aux utilisateurs de mieux comprendre les limites des tests réalisés dans le cadre de cette norme. En résumé, la norme EN 1751:2014 est d'une grande pertinence pour quiconque travaille dans le domaine de la ventilation des bâtiments. Sa portée et ses méthodes de test rigoureuses offrent une base solide pour l’évaluation des performances des damper et des vannes, soulignant son importance dans le cadre de la distribution d’air efficace et performante.

The EN 1751:2014 standard provides a comprehensive framework for the aerodynamic testing of dampers and valves used in air distribution systems, with a specific focus on scenarios involving pressure differences of up to 2,000 Pa. The scope of this European Standard is pivotal in ensuring that these air terminal devices operate effectively and meet necessary performance criteria. One of the significant strengths of this standard is its detailed methodology for testing. It encompasses a variety of critical tests, including the measurement of leakage past a closed damper or valve, casing leakage, flow rate, pressure requirements, torque characteristics, and thermal transmittance. Each test is methodically outlined to ensure consistent and reliable results, making it easier for manufacturers and engineers to evaluate the performance of air terminal devices. The specification of leakage testing, both for closed dampers and casing, provides valuable insights into the integrity of air distribution systems, highlighting the importance of sealing in achieving energy efficiency and optimal performance. The inclusion of flow rate/pressure requirement testing further affirms the standard's relevance in real-world applications, as it equips professionals with the necessary data for effective system design and troubleshooting. The standard also addresses thermal transmittance, which is essential for understanding insulation properties and energy efficiency, solidifying its significance in modern building ventilation design. Conversely, the deliberate omission of acoustic testing indicates a clear focus on aerodynamic performance metrics, allowing for granularity in the assessments of damper and valve functionality. Moreover, the note regarding the limitations in measuring dynamic performance reflects an understanding of practical challenges faced in the field. By acknowledging that some aspects of dynamic performance are intertwined with the specific air distribution system, EN 1751:2014 sets realistic expectations for practitioners, potentially guiding them towards more applicable testing interpretations. Overall, EN 1751:2014 stands out as a crucial standard for ensuring the aerodynamic efficiency and reliability of dampers and valves in air distribution systems. Its comprehensive testing methods and emphasis on performance metrics foster improved energy efficiency and system effectiveness, reinforcing its relevance to contemporary building ventilation strategies.

SIST EN 1751:2014の標準は、空調設備におけるダンパーおよびバルブの気流端末装置に関するテストおよび評価の方法を具体的に定めた重要な文書です。この標準の範囲は、圧力差が2,000 Paまでの空気流通システムで使用されるダンパーとバルブに関するものであり、業界のベストプラクティスに基づいたテストメソッドを提供しています。 この標準の強みは、その包括的なテスト項目にあります。具体的には、閉じたダンパーやバルブを通る漏れの測定、ケースの漏れ測定、流量と圧力要求の特性、トルク測定、そして熱貫流率の測定が含まれています。このような詳細なテストは、空気流通の効率性や安全性を確保し、適切な設計と性能評価を可能にします。 また、運用上の関連性も高い点が挙げられます。例えば、流量と圧力の要求特性を正確に把握することで、空調システムの設計者やエンジニアは、最適なダンパーやバルブの選定が行え、エネルギー効率の向上やコストの削減につながります。熱貫流率の測定も、断熱性能の評価に役立つため、建物のエネルギー性能を高めるための基礎データとして重要です。 ただし、音響テストに関する項目は含まれていないため、静音性を評価するためには別の基準が必要となる点には留意が必要です。また、動的性能測定に関しても空気流通システムに依存するため、この標準では測定が難しい点が明記されていますが、これも業界の特性を反映した選択であると理解できます。 総じて、SIST EN 1751:2014は、ダンパーとバルブの性能を明確に評価するための強力なツールを提供し、正確なテストと測定方法を定義することで、建物の換気システムの品質と効率性を向上させるために重要な役割を果たしています。

Die EN 1751:2014 ist eine entscheidende europäische Norm, die sich mit der Belüftung von Gebäuden und der Prüfung aerodynamischer Eigenschaften von Luftauslassgeräten, insbesondere von Dämpfern und Ventilen, befasst. Die Norm definiert klar die Methoden zur Prüfung und Bewertung von Dämpfern und Ventilen in Luftverteilungssystemen, die Druckunterschiede bis zu 2.000 Pa aufweisen. Ein herausragendes Merkmal dieser Norm ist der umfassende Prüfungsrahmen, der sicherstellt, dass verschiedene Aspekte der Leistung von Dämpfern und Ventilen umfassend bewertet werden. So werden unter anderem Prüfungen zur Leckage hinter einem geschlossenen Dämpfer oder Ventil sowie zur Gehäuseleckage ins Auge gefasst. Die Feststellung von Strömungs- und Druckanforderungen bildet ein weiteres zentrales Element der Norm, das die Effizienz und Funktionsfähigkeit von Luftverteilungssystemen sicherstellt. Die Norm enthält spezifische Vorschriften zur Messung von Drehmoment und thermischer Übertragung, was besonders wichtig ist, um die Isolierungseigenschaften von Dämpfern und Ventilen zu bestimmen. Diese Tests sind von entscheidender Bedeutung für die Optimierung des Energieverbrauchs und die Verbesserung des Raumklimas in modernen Gebäuden. Ein weiterer Vorteil der EN 1751:2014 ist die klare Klassifizierung der Testergebnisse in den Anhängen, die es Fachleuten erleichtert, fundierte Entscheidungen zu treffen. Diese Struktur ermöglicht es den Anwendern, die Testergebnisse effektiv zu interpretieren und anzuwenden. Es ist jedoch wichtig zu beachten, dass die akustische Prüfung von Dämpfern und Ventilen nicht Teil dieses Normenspiegels ist. Darüber hinaus können einige dynamische Leistungsaspekte von Dämpfern oder Ventilen nicht isoliert gemessen werden, da sie stark von dem spezifischen Luftverteilungssystem abhängen, mit dem sie verbunden sind. Diese Faktoren werden in der Norm angemessen berücksichtigt, wodurch der Anwender eine realistische Erwartungshaltung hat, was die Anwendbarkeit der Testergebnisse betrifft. Insgesamt besitzt die EN 1751:2014 eine hohe Relevanz für die Branche, da sie die Grundlage für die Qualitätssicherung in der Planung und Installation von Luftverteilungssystemen bietet. Die Norm fördert nicht nur die Effizienz von Dämpfern und Ventilen, sondern trägt auch zur Verbesserung der allgemeinen Luftqualität in Gebäuden bei.