EN 15726:2011

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Lüftung von Gebäuden - Luftverteilung - Messungen im Aufenthaltsbereich von klimatisierten/belüfteten Räumen zur Bewertung der thermischen und akustischen BedingungenSystèmes de ventilation pour les bâtiments - Diffusion d'air - Mesurages dans la zone d'occupation des pièces avec conditionnement d'air ou ventilation afin d'évaluer les conditions thermiques et acoustiquesVentilation for buildings - Air diffusion - Measurements in the occupied zone of airconditioned/ventilated rooms to evaluate thermal and acoustic conditions91.140.30VLVWHPLVentilation and air-conditioningICS:Ta slovenski standard je istoveten z:EN 15726:2011SIST EN 15726:2012en,fr,de01-februar-2012SIST EN 15726:2012SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 15726
October 2011 ICS 91.140.30 English Version
Ventilation for buildings - Air diffusion - Measurements in the occupied zone of air-conditioned/ventilated rooms to evaluate thermal and acoustic conditions
Systèmes de ventilation pour les bâtiments - Diffusion d'air - Mesurages dans la zone d'occupation des pièces avec conditionnement d'air ou ventilation afin d'évaluer les conditions thermiques et acoustiques
Lüftung von Gebäuden - Luftverteilung - Messungen im Aufenthaltsbereich von klimatisierten/belüfteten Räumen zur Bewertung der thermischen und akustischen Bedingungen This European Standard was approved by CEN on 4 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 15726:2011: ESIST EN 15726:2012

Operational and environmental conditions . 14Annex B (informative)
Typical Flow Pattern . 15Annex C (informative)
Intermittence and draught risk . 16Annex D (informative)
Estimation of Air velocities in the occupied zone for different types of jets. 19Annex E (informative)
Ventilation Efficiency Measurement. 20Bibliography . 21 SIST EN 15726:2012

This European Standard is applicable to measure some parameters of thermal and acoustic comfort (i.e. temperatures, air velocities…) in a room with an air diffusion system.
This European Standard can be used on site or in a lab for full-scale measurements.
This European Standard applies to ventilation or air conditioning systems designed to maintain the comfort conditions in buildings. It is not applicable in the case of systems for the control of industrial or other special process environments.
NOTE In the latter case however, it may be referred to if the system technology is similar to that of the above mentioned ventilation and air conditioning systems. 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 13182 Ventilation for buildings — Instrumentation requirements for air velocity measurements in ventilated spaces EN 13779, Ventilation for non-residential buildings — Performance requirements for ventilation and room-conditioning systems prEN 16211, Ventilation for buildings — Measurement of air flows on site — methods EN ISO 5167-1, Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full — Part 1: General principles and requirements (ISO 5167-1:2003) EN ISO 7726, Ergonomics of the thermal environment - Instruments for measuring physical quantities (ISO 7726:1998) 3 Terms and definitions
For the purposes of this document, the following terms and definitions apply: 3.1 reference point point where the measurements are taken 3.2 mean velocity time average velocity over the whole measuring period 3.3 spatial average velocity average value of mean velocities taken in several points in the occupied zone SIST EN 15726:2012

NOTE 2 Definition of the occupied zone is dependent on the geometry and the use of the room and should be specified case by case. [Occupied area, EN 13779, modified] 3.6 occupied zone (for laboratory purpose) portion of the treated space geometrically limited to be no closer than 0,15 m to all walls and within a height of 1,8 m above the floor 4 Test set up and conditions 4.1 General
Before any test, the air diffusion system shall be checked accordance with EN 12599 so that its performance may be recorded.
If the system performance does not meet the design criteria, correction shall be considered prior to the continuation of the test. If this is not possible this shall be made clear in the report along with the assumptions made. 4.2 Thermal loads The room should be occupied according to its expected use or thermal loads have to be simulated. This should include all internal and external loads (occupants, lights, equipment…). For on site measurements internal and external loads should be reported (actual or simulated).
4.3 Furniture Furniture, curtains, absorbent surfaces, etc. can influence thermal or acoustic characteristics and should therefore be as representative as possible. 4.4 Other conditions Operational conditions of system running (VAV, fan speed, variable geometry…) and environmental conditions do have influence on results and have to be reported according to Annex A. Conditions must be stabilised as much as possible during the test. For instance, supply temperature and reference point temperature should be checked regularly and should not vary during the test by more than +/- 1 K. If this is not possible then the variation shall be recorded. SIST EN 15726:2012

5.2 Measurements 5.2.1 General
Different levels of measurements can be used:  Level 1: easy and quick check at the reference point(s).
 Level 2: more detailed check. Level 1 tests have to be performed first. For each level, required measurements are indicated in Table 1. Table 1 — Measurements required
Level 1 Level 2 Airflow rate Smoke test or any other jet visualisation (5.2.2.1) Measurement (5.2.2.2) Velocities
Measurement (5.2.3.2) Temperatures At reference point (5.2.4.2) Measurement (5.2.4.3)
Sound pressure level Overall dB(A) level at the reference point, or any other point where the highest sound level can be expected. (5.2.5.1) Octave band in order to recalculate any criteria (dB(A), dB(C), NR…) asked (5.2.5.2) If required Ventilation Efficiency
see Annex E
5.2.2 Airflow rate 5.2.2.1 Level 1: Jet visualisation Jet shall be visualised either by smoke test or by any other means
The objective of the visualisation is:  to determine the air flow pattern in the occupied zone;
 to detect possible high velocity areas; SIST EN 15726:2012

Examples of common flow patterns are given in Annex B. 5.2.2.2 Level 2: Airflow rate measurements Any method described either in prEN 16211, EN 12599 or EN ISO 5167-1 (lab measurements) shall be used for the determination of airflow rates. Both supply and extract airflow rates shall be determined if applicable. Results have to be compared to designed values and, if not appropriate, ventilation system shall be adjusted before continuing measurements. 5.2.3 Velocities in the occupied zone 5.2.3.1 Level 1
No measurements are required. Flow visualisation as in 5.2.2. 5.2.3.2 Level 2: measurements The measurements of low velocities within treated spaces shall be made with a measuring device in accordance with EN 13182. Air velocities should be measured in enough points in the occupied zone to determine the velocity field in the occupied zone. To this end, two or more planes of measurements shall be chosen according to Figure 1 to Figure 5. One plane has to be perpendicular to the diffuser and centred on it. Test planes must be evenly distributed in the occupied zone and spaced with a distance between 0,6 m and 4 m. They are limited by the occupied zone and shall be representative of standard occupation of the room. SIST E
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