oSIST prEN 1886:2024

Ventilation for buildings - Air handling units - Mechanical performance

This document specifies test methods, test requirements and classifications for the casings of non-residential air handling units (AHU).
The test methods and requirements are applicable to both complete units and any separate sections, except for the thermal and acoustic performance of the casing.
The test method for the thermal performance of the casing is applicable for the comparison of different casing constructions, but not for the calculation of thermal losses through casing or the risk of condensation.
The test method for the acoustic performance of the casing is applicable for the comparison of different constructions, but not for the provision of accurate acoustic data for specific units.
This document is not applicable for fan-coil units and similar products.
The filter bypass test specified in this document is not applicable to high efficiency particulate air filter (HEPA) installations.

Lüftung von Gebäuden - Zentrale raumlufttechnische Geräte - Mechanische Eigenschaften und Messverfahren

Dieses Dokument legt Prüfverfahren, Prüfanforderungen und Klassifikationen für die Gehäuse von raumlufttechnischen Geräten (RLT Geräte) für Nichtwohngebäude fest.
Die Prüfverfahren und Anforderungen gelten sowohl für vollständige Geräte als auch für einzelne Baueinheiten, mit Ausnahme der thermischen und akustischen Eigenschaften des Gehäuses.
Das Prüfverfahren für die thermische Leistung des Gehäuses darf für den Vergleich verschiedener Konstruktionen verwendet werden, jedoch nicht, um Wärmeverluste durch das Gehäuse oder das Risiko der Kondensation zu berechnen.
Das Prüfverfahren für die akustische Leistung des Gehäuses darf nur verwendet werden, um verschiedene Produkte zu vergleichen, aber nicht, um genaue akustische Daten für bestimmte Geräteeinheiten herzuleiten.
Dieses Dokument gilt nicht für Ventilatorkonvektoren und ähnliche Produkte.
Die in diesem Dokument festgelegte Filter-Bypass-Prüfung gilt nicht für Anlagen mit hocheffizienten Schwebstofffiltern (HEPA).

Ventilation des bâtiments - Caissons de traitement d'air - Performances mécaniques

Le présent document spécifie les méthodes d’essai, les exigences d’essai et les classifications pour les enveloppes des caissons de traitement d’air (AHU) non résidentiels.
Les méthodes d'essai et les exigences sont applicables à la fois aux unités complètes et à toute section séparée, à l'exception des performances thermiques et acoustiques de l'enveloppe.
La méthode d’essai pour les performances thermiques de l’enveloppe est applicable pour la comparaison de différentes constructions d’enveloppes, mais pas pour calculer les pertes thermiques à travers l'enveloppe ou le risque de condensation.
La méthode d'essai pour les performances acoustiques de l'enveloppe est applicable pour la comparaison de différentes constructions, mais pas pour fournir des données acoustiques précises pour des unités spécifiques.
Le présent document ne s’applique pas aux ventilo-convecteurs ni aux produits similaires.
L’essai de dérivation du filtre spécifié dans le présent document ne s’applique pas aux installations de filtre à air à très haute efficacité (HEPA).

Prezračevanje stavb - Centralne enote - Mehanske lastnosti in merilni postopki

General Information

• Status: Not Published
• Public Enquiry End Date: 31-Jul-2024
• ICS: 91.140.30 - Ventilation and air-conditioning systems
• Technical Committee: OGS - Heating for buildings
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 30-May-2024
• Due Date: 17-Oct-2024
• Ref Project: prEN 1886 - Ventilation for buildings - Air handling units - Mechanical performance

Relations

• Revises: SIST EN 1886:2008 - Ventilation for buildings - Air handling units - Mechanical performance
• Effective Date: 31-May-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2024
Prezračevanje stavb - Centralne enote - Mehanske lastnosti in merilni postopki
Ventilation for buildings - Air handling units - Mechanical performance
Lüftung von Gebäuden - Zentrale raumlufttechnische Geräte - Mechanische
Eigenschaften und Messverfahren
Ventilation des bâtiments - Caissons de traitement d'air - Performances mécaniques
Ta slovenski standard je istoveten z: prEN 1886
ICS:
91.140.30 Prezračevalni in klimatski Ventilation and air-
sistemi conditioning systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2024
ICS 91.140.30 Will supersede EN 1886:2007
English Version
Ventilation for buildings - Air handling units - Mechanical
performance
Ventilation des bâtiments - Caissons de traitement Lüftung von Gebäuden - Zentrale raumlufttechnische
d'air - Performances mécaniques Geräte - Mechanische Eigenschaften und
Messverfahren
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 156.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1886:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Requirements for the model box . 7
4.1 General requirements . 7
4.2 Requirements for a model box for single casing section AHU ranges . 8
4.3 Reference to real unit or model box in classification . 8
5 Mechanical strength of casing . 8
5.1 General testing procedure . 8
5.1.1 General. 8
5.1.2 Classification of maximum pressure . 9
5.1.3 Casing strength classification . 9
5.1.4 Test preparation . 10
5.1.5 Test execution . 14
6 Casing air leakage . 16
6.1 Requirements and classification . 16
6.2 Test pressure . 17
6.2.1 General. 17
6.2.2 Site testing of units operating under both negative and positive pressure. 18
6.2.3 Laboratory testing . 18
6.3 Testing . 18
6.3.1 Test apparatus . 18
6.3.2 Preparation for test . 20
6.3.3 Test procedure . 20
6.3.4 Determination of allowable leakage rates . 21
7 Filter bypass leakage . 21
7.1 Requirements . 21
7.1.1 General. 21
7.1.2 Acceptable filter bypass leakage rates . 21
7.1.3 Two or more filter sections in the same unit . 22
7.2 Testing . 23
7.2.1 General. 23
7.2.2 Filter blanking plates . 23
7.2.3 Test procedure . 24
8 Internal leakage in bidirectional AHUs . 26
8.1 General. 26
8.2 Static internal leakage . 27
9 Thermal performance – model box . 28
9.1 General. 28
9.2 Test setup and environment . 28
9.3 Preparation of the model box . 30
9.4 Test procedure . 33
9.4.1 Thermal transmittance . 33
9.4.2 Thermal bridging factor (k ). 33
b
9.5 Calculation . 33
9.5.1 Calculation of the U-value . 33
9.5.2 Calculation of the k -value . 34
b
9.6 Classification . 35
10 Acoustic insulation of casing . 36
10.1 General . 36
10.2 Test requirements . 36
10.3 Test method . 36
10.4 Test procedure . 36
10.5 Sound power insulation procedure . 36
10.6 Uncertainty . 37
10.7 Presentation of the sound reduction . 38
11 Fire protection . 38
11.1 General . 38
11.2 Casing AHU materials . 38
11.3 Air heaters . 39
11.4 Filters, contact humidifiers and droplet eliminators of AHU's . 39
11.5 Heat recovery . 39
12 Mechanical safety . 39
Annex A (informative) Examples of arrangements of circulating fans . 40
Annex B (normative) Test report . 42
Annex C (informative) Example calculation of the deflection . 46
Annex D (informative) Example of determining filter bypass leakage . 50
Bibliography . 51

European foreword
This document (prEN 1886:2024) has been prepared by Technical Committee CEN/TC 156 “Ventilation
for buildings”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 1886:2007.
The main changes with respect to the previous edition are:
— a model box definition suitable for air handling unit ranges that are only manufactured using a single
casing without interme
...