SIST EN 15780:2012

Ventilation for buildings - Ductwork - Cleanliness of ventilation systems

This European Standard applies to both new and existing ventilation and air conditioning systems and specifies the assessment criteria of cleanliness, cleaning procedures of these systems, and 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 European Standard does not apply to installations for industrial processes. Cleanliness of ventilation systems is considered important for human comfort and health, energy consumption, system service life and for cleanliness of operations or processes carried out in the ventilated area. Considerations for change of component as an alternative for cleaning (e.g. in case of flexible ducts and air filters) are also included. This European Standard specifies general requirements and procedures necessary in assessing and maintaining the cleanliness of ducted ventilation, including:
- cleanliness quality classification;
- how to assess the need for cleaning (visual, measurements);
- assessment frequency (general guidance); guidance of system inspections in accordance with EN 15239, and EN 15240 when relevant;
- selection of cleaning method – to be in line with handing over documentation according to EN 12599;
- how to assess the result of cleaning.
This European Standard is a parallel standard to EN 12097, which specifies requirements for dimension, shape and location for access panels for cleaning and service in ductwork systems. This European Standard is made as an umbrella standard with informative annexes that can be revised, completed and further added in future revisions of this European Standard for specific system types, and products or applications in the system, such as:
- Air Handling Units (AHU);
- filter;
- humidifiers;
- heat recovery units;
- decentralised air treatment units such as fan-coil units, indu

Lüftung von Gebäuden - Luftleitungen - Sauberkeit von Lüftungsanlagen

Diese Europäische Norm gilt sowohl für neue als auch für bereits vorhandene Lüftungs  und Klimaanlagen und definiert die Kriterien für die Beurteilung der Sauberkeit sowie die Reinigungsverfahren für diese Anlagen; die Überprüfung der Wirksamkeit der Reinigung gilt auch für Produkte, die EN 1505, EN 1506, EN 13053, EN 13180 und EN 13403 entsprechen und in Klima  und Lüftungsanlagen für von Menschen genutzte Räume innerhalb des Anwendungsbereichs des CEN/TC 156 verwendet werden. Diese Europäische Norm gilt nicht für Anlagen für industrielle Verfahren.
Die Sauberkeit von Lüftungsanlagen ist wichtig für das Wohlbefinden und die Gesundheit des Menschen, den Energieverbrauch, die Nutzungsdauer der Anlage sowie für die Sauberkeit von Betriebsabläufen oder Prozessen, die im belüfteten Bereich ausgeführt werden.
Überlegungen bezüglich des Austauschs von Komponenten als Alternative zur Reinigung (z. B. im Falle von flexiblen Luftleitungen und Luftfiltern) wurden ebenfalls einbezogen.
Diese Europäische Norm legt allgemeine Anforderungen und Verfahren fest, die zur Beurteilung und Aufrechterhaltung der Sauberkeit von Luftleitungsanlagen erforderlich sind, darunter:
-   Einstufung der Sauberkeitsqualität;
-   Vorgehensweise bei der Beurteilung des Reinigungsbedarfs (optisch, Messungen);
-   Häufigkeit der Beurteilung (allgemeine Hinweise); Anleitung für Überprüfungen der Anlage nach EN 15239 und EN 15240, sofern zutreffend;
-   Wahl des Reinigungsverfahrens – um im Einklang mit der Übergabe-Dokumentation nach EN 12599 zu stehen;
-   Vorgehensweise bei der Beurteilung des Ergebnisses der Reinigung.
Diese Europäische Norm ist eine parallele Norm zu EN 12097, in der Anforderungen an die Maße, die Form und die Lage von Zugangsdeckeln für die Reinigung und Wartung von Luftleitungssystemen festgelegt sind.

Ventilation des bâtiments - Réseaux de conduits - Propreté des systèmes de ventilation

Cette norme Européenne s’applique aux systèmes de ventilation et de conditionnement d'air qu’ils soient
neufs ou anciens et spécifie les critères d’évaluation de la propreté. Les procédures de nettoyage de ces
systèmes, et la validation de l’efficacité du nettoyage s’applique aussi aux produits conformes à l’EN 1505,
l’EN 1506, l’EN 13053, l’EN 13180 et l’EN 13403, utilisés dans les systèmes de conditionnement de l’air et de
ventilation pour l’occupation humaine, définis dans le domaine d’application du CEN/TC 156. Cette norme EN
ne s’applique pas aux installations industrielles de process.
La propreté des systèmes de ventilation est considéré comme importante pour le confort et la santé humaine,
la consommation d’énergie, la durée de vie du système et pour la propreté des activités ou des processus
effectués dans la zone de ventilation.
Des considérations relatives au changement de composant comme alternative au nettoyage (par exemple
dans le cas de conduits flexibles et de filtres à air) sont aussi incluses.
Cette norme Européenne spécifie les exigences et les procédures générales nécessaires pour évaluer et
maintenir la propreté de la ventilation en conduit, dont :
- classification de la qualité de propreté ;
- comment évaluer le besoin de nettoyage (inspection visuelle, mesures) ;
- fréquence des évaluations (orientation générale) ; conseil pour les inspections des systèmes
conformément à l’EN 15239, et à l’EN 15240 quand pertinent ;
- sélection de la méthode de nettoyage – s’inscrivant dans le cadre de la documentation pour la réception
conformément à l’EN 12599 ;
- comment évaluer le résultat du nettoyage.
Cette norme Européenne est une norme parallèle à l’EN 12097, qui spécifie les exigences de dimension, de
forme et de localisation des panneaux d'accès pour le nettoyage et les interventions techniques dans les
réseaux de conduits.
(...)

Prezračevanje stavb - Kanali - Čistoča prezračevalnih sistemov

Ta evropski standard se uporablja za nove in obstoječe sisteme za prezračevanje in klimatizacijo ter določa merila za ocenjevanje čistoče, postopkov čiščenja teh sistemov in potrjevanje učinkovitosti čiščenja in velja tudi za izdelke, ki so skladni s standardi EN 1505, EN 1506, EN 13053, EN 13180 in EN 13403 in se uporabljajo v sistemih za prezračevanje in klimatizacijo za človeško uporabo, opredeljenih v področju uporabe CEN/TC 156. Ta evropski standard se ne uporablja za naprave za industrijske procese.
Čistoča prezračevalnih sistemov velja kot pomembna za udobje in zdravje človeka, porabo energije, življenjsko dobo sistema in čistočo postopkov ali procesov, ki se izvajajo na prezračevanem območju. Vključeni so tudi premisleki o zamenjavi dela kot nadomestilu za čiščenje (npr. pri gibkih kanalih in zračnih filtrih).
Ta evropski standard določa potrebne splošne zahteve in postopke za presojo in vzdrževanje čistoče prezračevalnih kanalov, vključno z:
– razvrstitvijo kakovosti čistoče;
– načinom za oceno potrebe po čiščenju (vizualno, meritve);
– pogostostjo ocen (splošni napotki); napotki za sistemske preglede v skladu s standardom EN 15239 in, kjer je ustrezno, EN 15240;
– izbiro metode čiščenja – da bo v skladu z oddajo dokumentacije iz standarda
EN 12599;
– načinom za oceno rezultatov čiščenja.
Ta evropski standard se uporablja skupaj s standardom EN 12097, ki določa zahteve za dimenzije, obliko in lokacijo plošče za dostop v primeru čiščenja in servisa sistemov kanalov.
Ta evropski standard je krovni standard z informativnimi dodatki, ki jih je mogoče revidirati, dopolniti in dodati v prihodnjih revizijah za specifične vrste sistemov, izdelkov ali naprav v sistemu, kot so:
– prezračevalne enote (AHU);
– filtri;
– vlažilniki;
– enote za vračanje toplote;
– samostojne enote za obdelavo zraka, kot so ventilatorski konvektorji, indu

General Information

• Status: Published
• Public Enquiry End Date: 29-May-2011
• Publication Date: 16-Jan-2012
• ICS: 91.060.40 - Chimneys, shafts, ducts
• ICS: 91.140.30 - Ventilation and air-conditioning systems
• Technical Committee: OGS - Heating for buildings
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 16-Dec-2011
• Due Date: 20-Feb-2012
• Completion Date: 17-Jan-2012
• Ref Project: EN 15780:2011 - Ventilation for buildings - Ductwork - Cleanliness of ventilation systems

Relations

• Revises: oSIST prEN 15780:2021 - Ventilation for buildings - Ductwork - Cleanliness of ventilation systems
• Effective Date: 18-Jan-2023
• Revised: oSIST prEN 15780:2008 - Ventilation for buildings - Ductwork - Cleanliness of ventilation systems
• Effective Date: 01-Feb-2012
• Revises: oSIST prEN 15780:2021 - Ventilation for buildings - Ductwork - Cleanliness of ventilation systems
• Effective Date: 19-Jan-2023
• Revised: oSIST prEN 15780:2021 - Ventilation for buildings - Ductwork - Cleanliness of ventilation systems
• Effective Date: 01-Jun-2021

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Lüftung von Gebäuden - Luftleitungen - Sauberkeit von LüftungsanlagenVentilation des bâtiments - Réseaux de conduits - Propreté des systèmes de ventilationVentilation for buildings - Ductwork - Cleanliness of ventilation systems91.140.30VLVWHPLVentilation and air-conditioning91.060.40Dimniki, jaški, kanaliChimneys, shafts, ductsICS:Ta slovenski standard je istoveten z:EN 15780:2011SIST EN 15780:2012en,fr,de01-februar-2012SIST EN 15780:2012SLOVENSKI
STANDARD



SIST EN 15780:2012



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 15780
October 2011 ICS 91.140.30 English Version
Ventilation for buildings - Ductwork - Cleanliness of ventilation systems
Ventilation des bâtiments - Réseaux de conduits -Propreté des systèmes de ventilation
Lüftung von Gebäuden - Luftleitungen - Sauberkeit von Lüftungsanlagen This European Standard was approved by CEN on 11 September 2011.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15780:2011: ESIST EN 15780:2012



EN 15780:2011 (E) 2 Contents Page Foreword . 41Scope. 52Normative references . 63Terms and definitions . 64Symbols and units . 75Criteria for cleanliness and assessment . 75.1General . 75.2Assessment of the need for cleaning . 75.3Design and handing over information . 85.4Determination of cleaning interval . 85.5Assessment of the result of cleaning . 86Methodology . 86.1General methodology . 86.2Assessment of the need for cleaning . 106.2.1General . 106.2.2Inspection plan . 106.2.3Evaluation methods of dust accumulation. 116.3Cleaning plan . 116.4Cleaning methods . 127Evaluation and reporting . 127.1Evaluation of cleaning . 127.2Cleaning report . 12Annex A (informative)
Cleanliness quality classes . 14A.1General . 14A.2Application in general. 14A.3Assessment frequency recommendation. 14A.4Cleanliness class quality measurements . 15A.5Unacceptable fouling – Extract . 15A.6Acceptable dust accumulation level (new ductwork) . 16A.7Acceptable post-clean level . 16Annex B (informative)
Example of cleaning plan . 17Annex C (informative)
Air Handling Units – specific guidance . 20C.1General . 20C.2Recommendations for all cleanliness quality classes . 20C.2.1Casing, including accessibility/access doors . 20C.2.2Filters. 21C.2.3Humidifiers . 21C.2.4Coils. 21C.2.5Sound attenuators . 21C.2.6Fan position and cleaning, including fan motors . 21C.2.7Drainage and prevention of condensation . 21C.3Units for advanced cleanliness quality class . 21C.4Inspection aspects . 22Annex D (informative)
Filters – Specific guidance . 23Annex E (informative)
Humidifiers – Specific guidance . 24SIST EN 15780:2012



EN 15780:2011 (E) 3 Annex F (informative)
Ductwork – Specific installation guidance . 25F.1Acceptable dust accumulation (new ductwork) . 25F.2Protection, Delivery and Installation (PDI) . 25F.3Application of cleanliness levels - airtightness . 27Annex G (informative)
Terminal devices and units – Specific guidance . 28Annex H (informative)
Measurement methods for dust accumulation . 29H.1Evaluation methods of dust accumulation. 29H.1.1General . 29H.1.2Visual inspection . 29H.1.3Methods of verifying deposited solid dust and micro-organisms . 30H.2Summary of methods for evaluation of cleanliness . 31Annex I (informative)
Preferred vacuum test method . 32I.1Test equipment . 32I.2Sampling procedure . 32I.3Analysis procedure . 33Bibliography . 34 SIST EN 15780:2012



EN 15780:2011 (E) 4 Foreword This document (EN 15780:2011) has been prepared by Technical Committee CEN/TC 156 “Ventilation for buildings”, the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2012, and conflicting national standards shall be withdrawn at the latest by April 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.
SIST EN 15780:2012



EN 15780:2011 (E) 5
1 Scope This European Standard applies to both new and existing ventilation and air conditioning systems and specifies the assessment criteria of cleanliness, cleaning procedures of these systems, and 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 European Standard does not apply to installations for industrial processes. Cleanliness of ventilation systems is considered important for human comfort and health, energy consumption, system service life and for cleanliness of operations or processes carried out in the ventilated area. Considerations for change of component as an alternative for cleaning (e.g. in case of flexible ducts and air filters) are also included. This European Standard specifies general requirements and procedures necessary in assessing and maintaining the cleanliness of ducted ventilation, including:  cleanliness quality classification;  how to assess the need for cleaning (visual, measurements);  assessment frequency (general guidance); guidance of system inspections in accordance with EN 15239, and EN 15240 when relevant;  selection of cleaning method – to be in line with handing over documentation according to
EN 12599;  how to assess the result of cleaning. This European Standard is a parallel standard to EN 12097, which specifies requirements for dimension, shape and location for access panels for cleaning and service in ductwork systems. This European Standard is made as an umbrella standard with informative annexes that can be revised, completed and further added in future revisions of this European Standard for specific system types, and products or applications in the system, such as:  Air Handling Units (AHU);  filter;  humidifiers;  heat recovery units;  decentralised air treatment units such as fan-coil units, induction units;  terminal devices;  kitchen extract equipment. The main target groups of this European Standard 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. SIST EN 15780:2012



EN 15780:2011 (E) 6 2 Normative references The following referenced documents are indispensable for the application 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 measuring methods for handing over installed ventilation and air conditioning systems EN 12792:2003, Ventilation for buildings — Symbols, terminology and graphical symbols EN 14799:2007, Air filters for general air cleaning — Terminology 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 impurities not to be exceeded, according to the specified measurement method 3.2 acceptable post-clean level no loose dust is detected visually on the duct surface after cleaning and the system is capable reaching an acceptable cleanliness level according to a defined measurement method NOTE 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 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 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 in the scope of this standard there are three levels of cleanliness quality standards to be applied to various buildings and types of system A. Low B. Medium C. High SIST EN 15780:2012



EN 15780:2011 (E) 7 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 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 5, applies to the ductwork but can be also applied to air handling units (according to EN 13053) and entire systems (see EN 13779:2007, Annex A)
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 its whole 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 15239. 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 (to check cleaning work). 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. SIST EN 15780:2012



EN 15780:2011 (E) 8 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 that fluid and contaminant can be evacuated. A sufficient number of access doors shall be provided in the ductwork. Additionally special care shall be taken regarding obstacles to cleaning such as dampers, sound attenuators etc., which are mounted in the ducts. In many cases additional access doors are needed after or before such obstacle, which then can be cleaned carefully. Requirements for location of and distance between access doors are presented in EN 12097 and EN 13779. 5.4 Determination of cleaning interval The cleaning interval shall in principle be defined by reference to the cleanliness or dirtiness of the system. Cleanliness or dirtiness shall in the first instance be assessed visually and this may be confirmed by means of measurement – see Annex A. The inspection interval to determine the need for cleaning may be defined in the system documentation in order to assist with maintenance planning or design considerations related to cleaning methods. NOTE Further guidance can be found from REHVA and EVHA Guidelines and also from national guidelines, e.g. VDI 6022 or HVCA TR19. 5.5 Assessment of the result of cleaning Methods for assessment of the need for cleaning can be also applied for assessment of the result of cleaning. The preferred method of post-clean verification is given in Annex A. See also 7.1. 6 Methodology 6.1 General methodology Figure 1 presents a procedure to control and maintain cleanliness of ventilation system. It does not include the design stages or selection and specification of the system, or any of its components. The system shall be first checked visually, both in assessing the need for cleaning and in verification of the result of cleaning. Objective measurements are needed if the visual inspection results in disagreement or uncertainty about cleanliness or need for cleaning. See Figure 1 for an explanatory flow-chart. Objective measurements may be defined in advance as part of the cleaning or inspection plan. NOTE REHVA Guideline and some national guidelines like VDI 6022 and FiSIAQ Guideline give more detailed guidance on product selection and specification from the hygienic point of view. SIST EN 15780:2012



EN 15780:2011 (E) 9 Y1234567810NYNYN9 Key 1 control and maintenance of cleanliness of air handling system 2 commissioning 3 periodic inspection 4 visually clean? 5 clearly unclean? 6 objective measurements 7 acceptable cleanliness level 8 cleaning 9 verification 10 documentation Y yes N no Figure 1 — Schematic flow chart for procedures to maintain cleanliness of ventilation system SIST EN 15780:2012



EN 15780:2011 (E) 10 If the components are certified for cleanliness or the cleanliness after production is otherwise verified, and if the cleanliness instructions are properly documented, the commissioning may be reduced to checking the documentation and spot checking of the system cleanliness (compliance with the documentation). See also 6.2.2. The methods applied for objective measurements and verification need to be consistent so that the result of inspection is acceptable and give reliable grounds for decision making to order cleaning work of the system when needed. Verification after cleaning is needed for quality control of the cleaning work, and to verify the cleaning result. NOTE 1 Annex H describes the preferred method of objective measurements. NOTE 2 An example of acceptable levels of cleanliness (or dirtiness) is explained in Annex F. Objective methods are needed if any guidelines or demands on cleanliness are set in official or in voluntary documents. The methods to evaluate the cleanliness vary, and thus target values given for the cleaning shall be accompanied by a description of the measurement method. Certain rare visible signs like visible microbial growth are enough to reveal the need for cleaning. For systems (consisting dust with less potential health risks) affected by dust the visible signs are not so clear and evaluation of the need by measurement may be needed to find out whether the ventilation system should be cleaned or not. Suspected instances of hazardous dusts such as asbestos and radiological materials need specialist investigation and should be dealt with separately. 6.2 Assessment of the need for cleaning 6.2.1 General Assessment of the characteristics of the contamination of the system is important in order to define the cleaning method to be used. System components are considered to be polluted when visual inspection and analytical verification give evidence of unacceptable dust level, microbial or other contamination. Assessment will be carried out through inspection. Dust accumulation, the type of pollutants, such as “bacterial growth should determine the need for cleaning, cleaning methods to be used and the required environmental controls. Elements to be inspected for cleanliness start from the outdoor air intake and should include at least:  Air Handling Units (AHU’s). AHU’s assessment should include all their components and sections: outdoor air intake, any mixing sections fan section, filters, plenums, heating and cooling coils, condensate trays, sound attenuators, heat recovery section, and humidifier section including droplet eliminators;  supply air ductwork, including all types of terminal devices and terminal units, sound attenuators, duct-mounted heating and cooling coils, dampers and valves;  extract air ductwork, including all types of components;  return and recirculation ductwork, including all types of components;  fresh air intake ductwork. 6.2.2 Inspection plan The inspection plan consists of the following information:  review plan and reports, including cleanliness quality class and measurement methods; SIST EN 15780:2012



EN 15780:2011 (E) 11  determining which systems will be inspected;  determining where to inspect and sample (see note);  choosing equipment and tools. Additionally, the inspection plan describes the requirements of the specific qualification and experience for inspectors before they are authorised to carry out inspection work. The assessment frequency shall be specified. NOTE 1 There are two types of inspection, according to EN 15239: pre-inspection including mainly collection of documentation and brief visual look, and full inspection on site. For new buildings, owner, specifier and builder may agree a particular inspection plan to suit their requirements. NOTE 2 Recommendations for assessment frequency are given in Annex A. To obtain objective results a representative number of samples from representative parts and sites in the ventilation system should be selected for evaluation of the cleanliness of the whole system. A good rule of thumb for choosing sites or taking samples is to select areas where the dust deposits are obvious, or liable to cause reduced indoor air quality (IAQ)
For inspecting and sampling, the ventilation system can be divided in two parts, the ductwork and the rest of the system. Before inspection or sampling, the sites should be selected at random with the aid of the design documents. The sampling sites in the ductwork should be selected from the main duct starting from the AHU, main ducts, and branch ducts. The sampling sites should include straight duct lengths and ducts with changes of direction or terminations. In the rest of the system, filters or humidifiers give usually a good indication of the cleaning needs. NOTE 3 System cleanliness inspections should also make reference to other parts of the as described in 6.2.1, and with particular reference to critical components such as filters and wet areas. 6.2.3 Evaluation methods of dust accumulation Different methods to evaluate cleanliness of ventilation systems are available.
The simplest methods are based on more or less subjective visual observation of the cleanliness of ventilation system combined with use of some special instrumentation. The advanced techniques are able to give relatively accurate results that are comparable to given limit values. NOTE The various methods available are discussed in Annex H. In Annex A preferred measurement methods and limit values are given which relate to various cleanliness quality classes, and to post-clean verification of cleanliness. 6.3 Cleaning plan If, as assessed according to 6.2, cleaning is needed, a cleaning plan shall be provided. The cleaning plan shall include:  a summary of the assessment including the list of the systems and parts that need to be cleaned;  detailed time schedule of cleaning;  cleaning methods to be applied;  description of how access will be gained to ducts and equipment not visible in the rooms (ducts, air handling units);  list of components to be removed for cleaning, and components to be replaced (when relevant);  protection of the rooms in which the cleaning equipment is used; SIST EN 15780:2012



EN 15780:2011 (E) 12  how and when the occupants are informed (including protection and safety considerations);  microbiological considerations when relevant, including considerations for the use of disinfection;  criteria to assess the need for involvement of a specialist on microbiological issues; technical data, including an estimate of the present level of dust and impurities, and target levels for cleanliness after cleaning; see Annex A;  evaluation methods for cleanliness after cleaning. One example of technical cleaning plan is presented in Annex B. 6.4 Cleaning methods Cleaning methods shall be sufficient to achieve the required level of cleanliness without damage to the system, to building users’ health and safety, and to the environment generally. NOTE Specific guidance about cleaning methods can be found in guidebooks published both nationally and on an EU basis such as those from REVHA and EVHA. 7 Evaluation and reporting 7.1 Evaluation of cleaning The final evaluation of cleaning shall be made after all parts of the ductwork or system subject to cleaning have been assessed as visually clean. Objective verification of post-clean cleanliness shall be carried out where necessary or as a result of dispute or uncertainty. The preferred method and limit value for post-clean verification of cleanliness is given in Annex A. Other methods may be selected voluntarily by agreement of parties to a cleaning contract. 7.2 Cleaning report A report shall be prepared and signed. The report shall include at least the following details: Details of the object (building, ventilation system, etc.):  the address, name, or other unique identifier of the property;  the owner or manager of the building;  the date of the inspection, cleaning and evaluation. List of the documents provided, including documentation of the product certificates and manufacturer's or supplier's instructions, whenever available. Details of the systems inspected:  physical descriptions of the systems subject to inspection and cleaning;  inventory of equipment. Methods and equipment used for cleaning, and assessment before and after cleaning (visual, measured): SIST EN 15780:2012



EN 15780:2011 (E) 13  results of assessment before cleaning;  scope of cleaning (entire system/ part of system);  results of assessment after cleaning;  documentation of the methods and equipment;  recommendations (inclusive recommended time for next assessment and cleaning).
SIST EN 15780
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Lüftung von Gebäuden - Luftleitungen - Sauberkeit von LüftungsanlagenVentilation des bâtiments - Réseaux de conduits - Propreté des systèmes de ventilationVentilation for buildings - Ductwork - Cleanliness of ventilation systems91.140.30VLVWHPLVentilation and air-conditioning91.060.40Dimniki, jaški, kanaliChimneys, shafts, ductsICS:Ta slovenski standard je istoveten z:FprEN 15780kSIST FprEN 15780:2011en,fr,de01-maj-2011kSIST FprEN 15780:2011SLOVENSKI
STANDARD



kSIST FprEN 15780:2011



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
FINAL DRAFT
FprEN 15780
March 2011 ICS 91.140.30 English Version
Ventilation for buildings - Ductwork - Cleanliness of ventilation systems
Ventilation des bâtiments - Réseaux de conduits -Propreté des systèmes de ventilation
Lüftung von Gebäuden - Luftleitungen - Sauberkeit von Lüftungsanlagen This draft European Standard is submitted to CEN members for unique acceptance procedure. 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland 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
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Avenue Marnix 17,
B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. FprEN 15780:2011: EkSIST FprEN 15780:2011



FprEN 15780:2011 (E) 2 Contents Page Foreword . 41Scope. 52Normative references . 63Terms and definitions . 64Symbols and units . 75Criteria for cleanliness and assessment . 75.1General . 75.2Assessment of the need for cleaning . 75.3Design and handing over information . 85.4Determination of cleaning interval . 85.5Assessment of the result of cleaning . 86Methodology . 86.1General methodology . 86.2Assessment of the need for cleaning . 106.2.1General . 106.2.2Inspection plan . 106.2.3Evaluation methods of dust accumulation. 116.3Cleaning plan . 116.4Cleaning methods . 127Evaluation and reporting . 127.1Evaluation of cleaning . 127.2Cleaning report . 12Annex A (informative)
Cleanliness quality classes . 14A.1General . 14A.2Application in general. 14A.3Assessment frequency recommendation. 14A.4Cleanliness class quality measurements . 15A.5Unacceptable fouling – Extract . 15A.6Acceptable dust accumulation level (new ductwork) . 16A.7Acceptable post-clean level . 16Annex B (informative)
Example of cleaning plan . 17Annex C (informative)
Air Handling Units – specific guidance . 20C.1General . 20C.2Recommendations for all cleanliness quality classes . 20C.2.1Casing, including accessibility/access doors . 20C.2.2Filters. 21C.2.3Humidifiers . 21C.2.4Coils. 21C.2.5Sound attenuators . 21C.2.6Fan position and cleaning, including fan motors . 21C.2.7Drainage and prevention of condensation . 21C.3Units for advanced cleanliness quality class . 21C.4Inspection aspects . 22Annex D (informative)
Filters – Specific guidance . 23Annex E (informative)
Humidifiers – Specific guidance . 24kSIST FprEN 15780:2011



FprEN 15780:2011 (E) 3 Annex F (informative)
Ductwork – Specific installation guidance . 25F.1Acceptable dust accumulation (new ductwork) . 25F.2Protection, Delivery and Installation (PDI) . 25F.3Application of cleanliness levels - airtightness . 27Annex G (informative)
Terminal devices and units – Specific guidance . 28Annex H (informative)
Measurement methods for dust accumulation . 29H.1Evaluation methods of dust accumulation. 29H.1.1General . 29H.1.2Visual inspection . 29H.1.3Methods of verifying deposited solid dust and micro-organisms . 30H.2Summary of methods for evaluation of cleanliness . 30Annex I (informative)
Preferred vacuum test method . 32I.1Test equipment . 32I.2Sampling procedure . 32I.3Analysis procedure . 33Bibliography . 34 kSIST FprEN 15780:2011



FprEN 15780:2011 (E) 4 Foreword This document (FprEN 15780:2011) 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 Unique Acceptance Procedure.
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FprEN 15780:2011 (E) 5
1 Scope This European Standard applies to both new and existing ventilation and air conditioning systems and specifies the assessment criteria of cleanliness, cleaning procedures of these systems, and 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 European Standard does not apply to installations for industrial processes. Cleanliness of ventilation systems is considered important for human comfort and health, energy consumption, system service life and for cleanliness of operations or processes carried out in the ventilated area. Considerations for change of component as an alternative for cleaning (e.g. in case of flexible ducts and air filters) are also included. This European Standard specifies general requirements and procedures necessary in assessing and maintaining the cleanliness of ducted ventilation, including:  cleanliness quality classification;  how to assess the need for cleaning (visual, measurements);  assessment frequency (general guidance); guidance of system inspections in accordance with EN 15239, and EN 15240 when relevant;  selection of cleaning method – to be in line with handing over documentation according to
EN 12599;  how to assess the result of cleaning. This European Standard is a parallel standard to EN 12097, which specifies requirements for dimension, shape and location for access panels for cleaning and service in ductwork systems. This European Standard is made as an umbrella standard with informative annexes that can be revised, completed and further added in future revisions of this European Standard for specific system types, and products or applications in the system, such as:  Air Handling Units (AHU);  filter;  humidifiers;  heat recovery units;  decentralised air treatment units such as fan-coil units, induction units;  terminal devices;  kitchen extract equipment. The main target groups of this European Standard are specifiers of the cleanliness quality classes and cleaning methods primarily system designers who also specify the system of access, building kSIST FprEN 15780:2011



FprEN 15780:2011 (E) 6 owners, services companies, maintenance companies, end users and consultancy and control companies. 2 Normative references The following referenced documents are indispensable for the application 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 measuring methods for handing over installed ventilation and air conditioning systems EN 12792:2003, Ventilation for buildings — Symbols, terminology and graphical symbols EN 14799:2007, Air filters for general air cleaning — Terminology 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 impurities not to be exceeded, according to the specified measurement method 3.2 acceptable post-clean level no loose dust is detected visually on the duct surface after cleaning and the system is capable reaching an acceptable cleanliness level according to a defined measurement method NOTE 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 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 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 in the scope of this standard there are three levels of cleanliness quality standards to be applied to various buildings and types of system A. Low B. Medium kSIST FprEN 15780:2011



FprEN 15780:2011 (E) 7 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 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 5, applies to the ductwork but can be also applied to air handling units (according to EN 13053) and entire systems (see EN 13779:2007, Annex A)
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 its whole 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 15239. 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 (to check cleaning work). 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. kSIST FprEN 15780:2011



FprEN 15780:2011 (E) 8 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 that fluid and contaminant can be evacuated. A sufficient number of access doors shall be provided in the ductwork. Additionally special care shall be taken regarding obstacles to cleaning such as dampers, sound attenuators etc., which are mounted in the ducts. In many cases additional access doors are needed after or before such obstacle, which then can be cleaned carefully. Requirements for location of and distance between access doors are presented in EN 12097 and EN 13779. 5.4 Determination of cleaning interval The cleaning interval shall in principle be defined by reference to the cleanliness or dirtiness of the system. Cleanliness or dirtiness shall in the first instance be assessed visually and this may be confirmed by means of measurement – see Annex A. The inspection interval to determine the need for cleaning may be defined in the system documentation in order to assist with maintenance planning or design considerations related to cleaning methods. NOTE Further guidance can be found from REHVA and EVHA Guidelines and also from national guidelines, e.g. VDI 6022 or HVCA TR19. 5.5 Assessment of the result of cleaning Methods for assessment of the need for cleaning can be also applied for assessment of the result of cleaning. The preferred method of post-clean verification is given in Annex A. See also 7.1. 6 Methodology 6.1 General methodology Figure 1 presents a procedure to control and maintain cleanliness of ventilation system. It does not include the design stages or selection and specification of the system, or any of its components. The system shall be first checked visually, both in assessing the need for cleaning and in verification of the result of cleaning. Objective measurements are needed if the visual inspection results in disagreement or uncertainty about cleanliness or need for cleaning. See Figure 1 for an explanatory flow-chart. Objective measurements may be defined in advance as part of the cleaning or inspection plan. NOTE REHVA Guideline and some national guidelines like VDI 6022 and FiSIAQ Guideline give more detailed guidance on product selection and specification from the hygienic point of view. kSIST FprEN 15780:2011



FprEN 15780:2011 (E) 9 Y1234567810NYNYN9 Key 1 control and maintenance of cleanliness of air handling system 2 commissioning 3 periodic inspection 4 visually clean? 5 clearly unclean? 6 objective measurements 7 acceptable cleanliness level 8 cleaning 9 verification 10 documentation Y yes N no Figure 1 — Schematic flow chart for procedures to maintain cleanliness of ventilation system kSIST FprEN 15780:2011



FprEN 15780:2011 (E) 10 If the components are certified for cleanliness or the cleanliness after production is otherwise verified, and if the cleanliness instructions are properly documented, the commissioning may be reduced to checking the documentation and spot checking of the system cleanliness (compliance with the documentation). See also 6.2.2. The methods applied for objective measurements and verification need to be consistent so that the result of inspection is acceptable and give reliable grounds for decision making to order cleaning work of the system when needed. Verification after cleaning is needed for quality control of the cleaning work, and to verify the cleaning result. NOTE 1 Annex H describes the preferred method of objective measurements. NOTE 2 An example of acceptable levels of cleanliness (or dirtiness) is explained in Annex F. Objective methods are needed if any guidelines or demands on cleanliness are set in official or in voluntary documents. The methods to evaluate the cleanliness vary, and thus target values given for the cleaning shall be accompanied by a description of the measurement method. Certain rare visible signs like visible microbial growth are enough to reveal the need for cleaning. For systems (consisting dust with less potential health risks) affected by dust the visible signs are not so clear and evaluation of the need by measurement may be needed to find out whether the ventilation system should be cleaned or not. Suspected instances of hazardous dusts such as asbestos and radiological materials need specialist investigation and should be dealt with separately. 6.2 Assessment of the need for cleaning 6.2.1 General Assessment of the characteristics of the contamination of the system is important in order to define the cleaning method to be used. System components are considered to be polluted when visual inspection and analytical verification give evidence of unacceptable dust level, microbial or other contamination. Assessment will be carried out through inspection. Dust accumulation, the type of pollutants, such as “bacterial growth should determine the need for cleaning, cleaning methods to be used and the required environmental controls. Elements to be inspected for cleanliness start from the outdoor air intake and should include at least:  Air Handling Units (AHU’s). AHU’s assessment should include all their components and sections: outdoor air intake, any mixing sections fan section, filters, plenums, heating and cooling coils, condensate trays, sound attenuators, heat recovery section, and humidifier section including droplet eliminators;  supply air ductwork, including all types of terminal devices and terminal units, sound attenuators, duct-mounted heating and cooling coils, dampers and valves;  extract air ductwork, including all types of components;  return and recirculation ductwork, including all types of components;  fresh air intake ductwork. 6.2.2 Inspection plan The inspection plan consists of the following information:  review plan and reports, including cleanliness quality class and measurement methods; kSIST FprEN 15780:2011



FprEN 15780:2011 (E) 11  determining which systems will be inspected;  determining where to inspect and sample (see note);  choosing equipment and tools. Additionally, the inspection plan describes the requirements of the specific qualification and experience for inspectors before they are authorised to carry out inspection work. The assessment frequency shall be specified. NOTE 1 There are two types of inspection, according to EN 15239: pre-inspection including mainly collection of documentation and brief visual look, and full inspection on site. For new buildings, owner, specifier and builder may agree a particular inspection plan to suit their requirements. NOTE 2 Recommendations for assessment frequency are given in Annex A. To obtain objective results a representative number of samples from representative parts and sites in the ventilation system should be selected for evaluation of the cleanliness of the whole system. A good rule of thumb for choosing sites or taking samples is to select areas where the dust deposits are obvious, or liable to cause reduced indoor air quality (IAQ)
For inspecting and sampling, the ventilation system can be divided in two parts, the ductwork and the rest of the system. Before inspection or sampling, the sites should be selected at random with the aid of the design documents. The sampling sites in the ductwork should be selected from the main duct starting from the AHU, main ducts, and branch ducts. The sampling sites should include straight duct lengths and ducts with changes of direction or terminations. In the rest of the system, filters or humidifiers give usually a good indication of the cleaning needs. NOTE 3 System cleanliness inspections should also make reference to other parts of the as described in 6.2.1, and with particular reference to critical components such as filters and wet areas. 6.2.3 Evaluation methods of dust accumulation Different methods to evaluate cleanliness of ventilation systems are available.
The simplest methods are based on more or less subjective visual observation of the cleanliness of ventilation system combined with use of some special instrumentation. The advanced techniques are able to give relatively accurate results that are comparable to given limit values. NOTE The various methods available are discussed in Annex H. In Annex A preferred measurement methods and limit values are given which relate to various cleanliness quality classes, and to post-clean verification of cleanliness. 6.3 Cleaning plan If, as assessed according to 6.2, cleaning is needed, a cleaning plan shall be provided. The cleaning plan shall include:  a summary of the assessment including the list of the systems and parts that need to be cleaned;  detailed time schedule of cleaning;  cleaning methods to be applied;  description of how access will be gained to ducts and equipment not visible in the rooms (ducts, air handling units);  list of components to be removed for cleaning, and components to be replaced (when relevant);  protection of the rooms in which the cleaning equipment is used; kSIST FprEN 15780:2011



FprEN 15780:2011 (E) 12  how and when the occupants are informed (including protection and safety considerations);  microbiological considerations when relevant, including considerations for the use of disinfection;  criteria to assess the need for involvement of a specialist on microbiological issues; technical data, including an estimate of the present level of dust and impurities, and target levels for cleanliness after cleaning; see Annex A;  evaluation methods for cleanliness after cleaning. One example of technical cleaning plan is presented in Annex B. 6.4 Cleaning methods Cleaning methods shall be sufficient to achieve the required level of cleanliness without damage to the system, to building users’ health and safety, and to the environment generally. NOTE Specific guidance about cleaning methods can be found in guidebooks published both nationally and on an EU basis such as those from REVHA and EVHA. 7 Evaluation and reporting 7.1 Evaluation of cleaning The final evaluation of cleaning shall be made after all parts of the ductwork or system subject to cleaning have been assessed as visually clean. Objective verification of post-clean cleanliness shall be carried out where necessary or as a result of dispute or uncertainty. The preferred method and limit value for post-clean verification of cleanliness is given in Annex A. Other methods may be selected voluntarily by agreement of parties to a cleaning contract. 7.2 Cleaning report A report shall be prepared and signed. The report shall include at least the following details: Details of the object (building, ventilation system, etc.):  the address, name, or other unique identifier of the property;  the owner or manager of the building;  the date of the inspection, cleaning and evaluation. List of the documents provided, including documentation of the product certificates and manufacturer's or supplier's instructions, whenever available. Details of the systems inspected:  physical descriptions of the systems subject to inspection and cleaning;  inventory of equipment. Methods and equipment used for cleaning, and assessment before and after cleaning (visual, measured): kSIST FprEN 15780:2011



FprEN 15780:2011 (E) 13  results of assessment before cleaning;  scope of cleaning (entire system/ part of system);  results of assessment after cleaning;  documentation of the methods and equipment;  recommendations (inclusive recommended time for next assessment and cleaning).
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FprEN 15780:2011 (E) 14 Annex A (informative)
Cleanliness quality classes A.1 General This annex gives a summary of three cleanliness quality classes. It is a key issue to pay attention to cleanliness in design of systems and especially in component selection and specification. It may be modified to take better into account some existing national guidance such as FiSIAQ guideline and VDI 60
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