oSIST prEN 15780:2021

SLOVENSKI STANDARD
01-junij-2021
Prezračevanje stavb - Kanali - Čistoča prezračevalnih sistemov
Ventilation for buildings - Ductwork - Cleanliness of ventilation systems
Lüftung von Gebäuden - Luftleitungen - Sauberkeit von Lüftungsanlagen
Ventilation des bâtiments - Réseaux de conduits - Propreté des systèmes de ventilation
Ta slovenski standard je istoveten z: prEN 15780
ICS:
91.060.40 Dimniki, jaški, kanali Chimneys, shafts, ducts
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 2021
ICS 91.140.30 Will supersede EN 15780:2011
English Version
Ventilation for buildings - Ductwork - Cleanliness of
ventilation systems
Ventilation des bâtiments - Réseaux de conduits - Lüftung von Gebäuden - Luftleitungen - Sauberkeit von
Propreté des systèmes de ventilation Lüftungsanlagen
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, Turkey 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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15780:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Symbols and units . 5
5 Criteria for cleanliness and assessment . 5
5.1 General . 5
5.2 Assessment of the need for cleaning . 6
5.3 Design and handing over information . 6
5.4 Determination of cleaning interval . 6
5.5 Assessment of the result of cleaning . 7
6 Methodology . 7
6.1 General . 7
6.2 Assessment of methodology . 9
6.2.1 General . 9
6.2.2 Inspection plan . 9
6.2.3 Evaluation methods of dust accumulation . 10
6.3 Cleaning plan . 10
6.4 Cleaning methods . 11
7 Evaluation and reporting . 11
7.1 General . 11
7.2 Evaluation of cleaning . 11
7.3 Cleaning report . 11
Annex A (informative)  Cleanliness quality Air ventilation systems . 14
Annex B (informative)  Example of cleaning plan for Air ventilation system . 17
Annex C (informative)  Air Handling Units – specific guidance . 20
Annex D (informative)  Specific guidance for Filters in Air Handling Units . 23
Annex E (informative)  Specific guidance for Humidifiers in Air handling units . 24
Annex F (informative) Ductwork – Specific installation guidance for Air ventilation
system. 25
Annex G (informative) Terminal devices and units – Specific guidance Air ventilation
system. 28
Annex H (informative) Measurement methods for dust accumulation - Air ventilation
system. 29
Annex I (informative)  European Vacuum test method for measuring Dust
Accumulation in Air ventilation systems . 32
Annex J (informative) Kitchen Extract Equipment – Specific guidance . 34
Annex K (informative) Wiping test method to Evaluate Cleanliness on Site . 41
Bibliography . 43

European foreword
This document (prEN 15780:2021) 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 15780:2011.
1 Scope
This document applies to both new and existing ventilation, air conditioning systems and kitchen
extract system and specifies the assessment criteria of cleanliness, cleaning procedures of these
systems. The validation of the effectiveness of cleaning applies also to products, which conform
to EN 1505, EN 1506, EN 13053, EN 13180 and EN 13403, used in air conditioning and
ventilation systems for human occupancy defined in the scope of CEN/TC 156. This document
does not apply to installations for industrial, medical and laboratory facilities.
This document specifies general requirements and procedures necessary in assessing and
maintaining the cleanliness of ducted ventilation, for air ventilation systems and kitchen extract
systems.
The main target groups of this document are specifiers of the cleanliness quality classes and
cleaning methods primarily system designers who also specify the system of access, building
owners, services companies, maintenance companies, end users and consultancy and control
companies.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
EN 12599, Ventilation for buildings - Test procedures and measurement methods to hand over air
conditioning and ventilation systems
EN 12792:2003, Ventilation for buildings - Symbols, terminology and graphical symbols
EN 14799:2007, Air filters for general air cleaning — Terminology
EN 12097, Ventilation for Buildings - Ductwork - Requirements for ductwork components to
facilitate maintenance of ductwork systems
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 12792:2003 and
EN 14799:2007 and the following apply.
3.1
acceptable cleanliness level
amount of dust or other contaminants not to be exceeded, according to the specified
measurement method
3.2
acceptable post-clean level
no loose dust or for kitchen extract equipment, adhered grease deposits are detected visually on
the duct surface after cleaning and the system can reach an acceptable cleanliness level according
to a defined measurement method
Note 1 to entry: In case of conflict (e.g. between the building owner and the user), or uncertainty
objective methods are needed to assess the cleanliness/dirtiness
3.3
acceptable dust accumulation level (new ductwork)
acceptable cleanliness level on new ductwork as handed over from builder to user
Note 1 to entry: In practice this means the quantity of pollution which is deemed acceptable
3.4
cleanliness
state or level of pollution defined as acceptable according to specification and a particular
measurement method
Note 1 to entry: Cleanliness is not absolute, it is defined by limit values. Dirtiness is the exceeding of such
a defined limit value
3.5
cleanliness quality class
level of cleanliness quality standard to be applied to various buildings and type of system,
consisting of three levels
— A: Low
— B: Medium
— C: High
3.6
visual inspection
subjective method to evaluate cleanliness level of surfaces
4 Symbols and units
For the purpose of this document, the symbols and units given in EN 12792:2003 apply.
5 Criteria for cleanliness and assessment
5.1 General
This chapter refers to ducted ventilation, for air ventilation systems. Kitchen extract systems are
dealt within Annex J
The key issue is to design, build and maintain the whole ventilation system so that it can be kept
clean enough during the whole lifetime of the installation. The following requirements, as well as
the methodology described in Clause 6, applies to the ductwork but can be also applied to air
handling units (according to EN 13053) and entire systems (see EN 16798-3and Annex A of this
document) Therefore it is necessary to specify the cleanliness quality class from the beginning
and include in the specification both design and installation issues and means to maintain a
sufficiently clean ventilation system for the whole of the lifetime. The design and installation
issues shall include (as a minimum):
— cleanliness quality class;
— cleanliness criteria and measurement method;
— production of the system components;
— delivery to site;
— site storage;
— installation;
— protection of components after installation;
— handing over the system according to EN 12599
NOTE Annex A presents, as a common classification, three classes of cleanliness, application examples
for ductwork, and recommendations for the frequency of regular inspections in accordance with EN 16798
part 17.
5.2 Assessment of the need for cleaning
Inspection of functionality and cleanliness of ventilation system is a part of proper maintenance
of the ventilation systems. Mostly the inspection of the cleanliness may arise from two purposes:
— to check if ventilation system is dirty and needs to be cleaned (exceeding of a “target level” of
cleanliness);
— to evaluate cleanliness after the cleaning work
NOTE The assessment methodology is presented in 6.2.
For existing buildings, the inspection shall include a study of the existing documentation and
recommendations to complete and update the documents.
Specific considerations for kitchen extract equipment, the frequency of cleaning should be
sufficiently frequent that grease deposit limits are not exceeded.
5.3 Design and handing over information
In the handing-over documents the cleanliness quality class, cleanliness criteria and
measurement methods shall be specified, recommendations for cleaning methods and guidelines
for reaching the points to be cleaned shall also be given.
The design information shall give consideration to the expected cleaning method. Where the
system has been designed to be cleaned by wet cleaning methods, warning regarding conditions
and restrictions of use should be given. For example, wet methods are applicable only where
ducts are sufficiently moisture-tight, internal surfaces are smooth, and slope and drainage
arrangements have been provided so t
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