BS EN 15780:2011 pdf free download Ventilation for buildings — Ductwork — Cleanliness of ventilation systems
1 Scope
This European Standard applies to both new and existing ventilation and air conditioning systems andspecifies the assessment criteria of cleanliness, cleaning procedures of these systems and thevalidation 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 forhuman occupancy defined in the scope of CENTC 156.This European Standard does not apply toinstallations for industrial processes.
Cleanliness of ventilation systems is considered important for human comfort and health,energyconsumption,system service life and for cleanliness of operations or processes carried out in theventilated area.
Considerations for change of component as an alternative for cleaning (e.g. in case of flexible ductsand air filters) are also included.
This European Standard specifies general requirements and procedures necessary in assessing andmaintaining 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 withEN 15239, and EN 15240 when relevant;
selection of cleaning method – to be in line with handing over documentation according toEN 12599;
how to assess the result of cleaning.
This European Standard is a parallel standard to EN 12097,which specifies requirements fordimension, 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 berevised, completed and further added in future revisions of this European Standard for specific systemtypes, 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 classesand cleaning methods primarily system designers who also specify the system of access, buildingowners,services companies,maintenance companies,end users and consultancy and controlcompanies.
2Normative references
The following referenced documents are indispensable for the application of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenceddocument (including any amendments) applies.
EN 12599,Ventilation for buildings — Test procedures and measuring methods for handing overinstalled ventilation and air conditioning systems
EN 12792:2003,Ventilation for buildings — Symbols, terminology and graphical symbolsEN 14799:2007,Air filters for general air cleaning – Terminology
3Terms and definitions
For the purposes of this document,the terms and definitions given in EN 12792:2003 andEN 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 measurementmethod
3.2
acceptable post-clean level
no loose dust is detected visually on the duct surface after cleaning and the system is capablereaching 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 areneeded 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 userNOTE 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 particularmeasurement method
NOTE Cleanliness is not absolute, it is defined by limit values. Ditiness is the exceeding of such a definedlimit value.
3.5
cleanliness quality class
in the scope of this standard there are three levels of cleanliness quality standards to be applied tovarious buildings and types of system