SIST EN 15665:2009

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.DVQRYRLüftung von Gebäuden - Bestimmung von Leistungskriterien für die Auslegung von Lüftungssystemen in WohngebäudenVentilation des bâtiments - Détermination des criteres de performance pour la conception des systemes de ventilation résidentielleVentilation in buildings - Determining performance criteria for design of residential ventilation systems91.140.30VLVWHPLVentilation and air-conditioningICS:Ta slovenski standard je istoveten z:EN 15665:2009SIST EN 15665:2009en,fr,de01-julij-2009SIST EN 15665:2009SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 15665March 2009ICS 91.140.30 English VersionVentilation for buildings - Determining performance criteria forresidential ventilation systemsVentilation des bâtiments - Détermination des critères deperformance pour les systèmes de ventilation résidentielleLüftung von Gebäuden - Bestimmung vonLeistungskriterien für Lüftungssysteme in WohngebäudenThis European Standard was approved by CEN on 7 February 2009.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre:
Avenue Marnix 17,
B-1000 Brussels© 2009 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15665:2009: ESIST EN 15665:2009

Example of general requirements (from Switzerland) . 23A.1General requirements for all ventilation systems . 23A.2Exhaust ventilation systems . 23A.2.1General . 23A.2.2Requirements for devices (only for exhaust ventilation systems) . 23A.2.3Mechanical Ventilation (with supply and exhaust fans) . 23A.3Assumptions and criteria chosen for ventilation airflow rates values (level 1) . 27A.3.1Exhaust ventilation systems . 27A.3.2Mechanical ventilation (with supply and exhaust fans) . 27Annex B (informative)
Example of occupancy scenario . 29 SIST EN 15665:2009

This European Standard is intended to support any regulation or standard. This European Standard is intended to give guidance to those with responsibility for producing requirements and standards for residential ventilation systems.
It is recommended that future revisions of relevant regulations and standards should consider the content of this European Standard.
Figure 1 — Pollutant process SIST EN 15665:2009

These criteria are meant to be applied to, in particular:  mechanically ventilated building (mechanical exhaust, mechanical supply or balanced system);  natural ventilation with stack effect for passive ducts;  hybrid system switching between mechanical and natural modes;  windows opening by manual operation for airing or summer comfort issues. This European Standard considers aspects of hygiene and indoor air quality.
Health risk from exposure to tobacco smoke is excluded from this European Standard. 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 12792:2003, Ventilation for buildings – Symbols, terminology and graphical symbols EN 15242:2007, Ventilation for buildings – Calculation methods for the determination of air flow rates in buildings including infiltration 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 12792:2003 and the following apply. 3.1 background pollutants group of indoor pollutants which are continuous and diffuse NOTE 1 These pollutants are represented by materials, furnishings and products used in the dwelling. NOTE 2 These pollutants also include those resulting from human occupation such as water vapour and carbon dioxide from respiration. 3.2 specific pollutants group of indoor pollutants which are of short duration, and in specific locations in the dwelling NOTE These pollutants are mainly represented by water vapour, carbon dioxide and odours, whose production is related to specific human activities in the dwelling (such as cooking, washing, bathing). SIST EN 15665:2009

NOTE Requirements can be, for example, "maximum of 100 hours above 70 % in living room", "less than 10 minutes to reach 25 % of initial ", "less than 800 10-6 CO2 (generally named ppm) as an average", "minimum of 8 l/s in toilet", "35 l/s for global ventilation in standard inside/outside conditions". 4 Symbols and units For the purposes of this document, the symbols and units given in EN 12792:2003 apply. 5 Needs for residential ventilation: main issues 5.1 General There shall be adequate means of ventilation provided for the building and its occupants.
5.2 General sources of pollutants The following sources of pollutants influencing the ventilation in dwelling shall be considered:
 Outside environment, such as climate, earth (which can provide radon);
 Human respiration, odours;  Human behaviour, such as cooking, bathing, drying machine, cleaning;  Emissions of building materials and furniture;  Emissions of cleaning material;  Combustion appliance. Each of these sources can produce pollutants.
Depending on the pollutant sources given in 5.2, the following consequences can be observed: a) For the building: risk of condensation, risk of dryness, mould growth, fungi’s, dust mites, interstitial condensation; b) For human health and comfort: carbon monoxide, CO2 level and water vapour, temperature, air velocity, germs, microorganisms, formaldehydes, VOC (volatile organic compounds), “volatile organic compound, odours, noise from outside. 5.4 Expectations about ventilation Considering the pollutant sources and their consequences, the adequate means of ventilation should be provided for one or more of the following purposes: a) Dilution and/or removal of background pollutants such as substances emitted by furnishings and building materials and cleaning materials used in the building, odours, metabolic CO2 and water vapour; b) Dilution and/or removal of specific pollutants from identifiable local sources such as toilet odours, cooking odours, water vapour from cooking or bathing, combustion products; c) Provision of outdoor air for occupants;
d) Provision of control of temperature effects (over heating and draught);
e) Provision of air for combustion appliances. All these purposes shall be considered with regard to the health and comfort of the occupants and integrity of the building.
NOTE 1 Ventilation is primarily concerned with the first three purposes (a) to c)) but it is linked to the last two (d and e)).
NOTE 2 When providing ventilation, other aspects of performance including thermal comfort, durability, fire safety, noise and energy use should be considered. 6 General approach 6.1 Questions, assumptions and way of proceeding
Before designing a ventilation system, the people involved in regulations and/or standards shall answer lots of questions and assumptions that have to be taken into account for calculation. The result of this calculation can be expressed by a continuous explicit airflow rate (e.g. mechanical ventilation with constant airflow rate) or an equivalent airflow in terms of air quality according to conventional assumptions applicable in each country (e.g. Technical Approvals). The following way of proceeding shall be used in order to determine airflow rates (see Figure 2): a) Step 1: verify if there is any applicable regulation
(health, fire protection, noise, gas, etc.) in the country that leads to certain limit in airflows; b) Step 2: identify the parameters which are taken into account or which are considered as relevant; c) Step 3: at this step of the procedure, take into account the 3 following points: SIST EN 15665:2009

Figure 2 — Way of proceeding for the determination of airflow rates
NOTE The process remains the same but the level of the assumption can be fitted to level 1 to 3; see 6.2. SIST EN 15665:2009

 ventilation airflow rates values (level 1);  calculation done for one point (level 2);  yearly calculation done for design days (daily pattern) (level 3). At each level, different tables shall be completed. At each corresponding level, criteria shall be chosen between the different ways developed in Clause 7 to explain how parameters are taken into account. For each level, the number of cases could vary from one case to many (statistical approach), depending on the size of the building, the number of habitants, etc. NOTE The local ventilation effectiveness may affect the calculation of exposure level.
6.2.2 Assumptions and criteria chosen for ventilation airflow rates values (level 1) The design regulation or standard shall describe the following relevant items:
a) Type of room: 1) Type of process for extract and supply air (natural or mechanical); 2) Floor level. b) Regime: 1) Continuous (min, max); 2) Intermittent (min, max, time schedule); 3) Closable or not (air inlets). c) Airflow rate expressed in one of the following expression in Table 1: 1) l/s per m2 2) l/s per person 3) l/s per room d) Global airflow rates (including infiltrations). e) Global air infiltration. At the level of component (externally and internally mounted air transfer devices, exhaust and supply air terminal devices, etc.) requirements can be expressed in equivalent area mm2, in airflow at a certain pressure difference ∆P, etc.
Airflow rate in l/s Room or space Airflow rate (Normal value) Airflow rate (Increased value) Kitchen
Bathroom
WC
Living room
Bedroom 1
Bedroom n
All dwelling
An example is given in Annex A. 6.2.3 Assumptions and criteria chosen for a single calculation representing point (level 2) The requirements considered at level 2 are for a single calculation representing point, for example, for an average point in winter to roughly design a shaft natural ventilation airflow.
NOTE A shaft natural ventilation system relies on pressure differences without the aid of powered air movement components. Assumptions for the case under consideration are given in Table 2. The size of the dwelling under consideration shall be defined as assumptions for the case under consideration.
In case of no specific assumptions, default value shall be used for the calculation, as specified in Table 2. Table 2 — Assumptions for level 2 Assumptions Case under consideration Default value Unit Indoor temperature
19 °C Outdoor temperature
8 °C Wind speed
1 m/s Wind directiona
60° windward - Shieldinga
shielded - Air leakage classes
n50 = 1
1/h Air leakage splitting
See Table 4. - Outdoor humidity (optional)
% RH a According to EN 15242.
Minimum continuous airflow
a Additional parameters and corresponding assumption should be added if necessary.
Table 4 — Distribution of air leakage (default values) Distribution single family Air leakage class, n50
< 1 1 to 3 3 to 6 > 6 Floor and other leakages for instance adjacent buildings 20 % 25 % 30 % 35 % Roof 30 % 35 % 40 % 45 % Facade (at 1/3 height) 25 % 20 % 15 % 10 % Facade (at 2/3 height) 25 % 20 % 15 % 10 %
Key 1 Leakage to crawlspace and other dwellings mainly penetrations for plumbing and waste water 2 Leakage through roof and joint roof/wall including penetrations for exhaust 3 Façade leakage cracks and joints between construction parts such as window-frame and walls, but also joints between movable parts concentrated on 1/3 of the height of the facade 4 Façade leakage cracks and joints between construction parts such as window-frame and walls, but also joints between movable parts concentrated on 2/3 of the height of the facade
Figure 3 — Distribution of air leakage 6.2.4 Assumptions and criteria chosen for a yearly calculation done for design days (level 3) For level 3, assumptions shall be made for one day, at a suitable frequency for all patterns concerning occupancy, outside conditions, ventilation system use or pollutant sources. NOTE Calculations lead to relationship between airflows and pollutant concentration.
Requirements shall be used in one of the different frames defined in Clause 7. This level 3 shall be used for daily calculations or for yearly calculations. Each day can have the same or different patterns if needed, e.g. week-end patterns are often used and are different from week patterns. Airflow rates
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