BS EN 13141-7 2004 VENTILATION FOR BUILDINGS.pdf

8/20/2019 BS EN 13141-7 2004 VENTILATION FOR BUILDINGS.pdf

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BRITISH STANDARD BS EN13141-7:2004

Ventilation forbuildings —

Performance testing of

components/products

for residential

ventilation —

Part 7: Performance testing of amechanical supply and exhaustventilation units (including heatrecovery) for mechanical ventilation

systems intended for single familydwellings

The European Standard EN 13141-7:2004 has the status of aBritish Standard

ICS 91.140.30


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BS EN 13141-7:2004

This British Standard waspublished under the authorityof the Standards Policy andStrategy Committeeon 31 October 2005

© BSI 31 October 2005

ISBN 0 580 46778 3

National foreword

This British Standard is the official English language version ofEN 13141-7:2004.

The UK participation in its preparation was entrusted to Technical Committee

RHE/2, Ventilation for buildings, heating and hot water services, which has theresponsibility to:

A list of organizations represented on this committee can be obtained onrequest to its secretary.

Cross-references

The British Standards which implement international or Europeanpublications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, orby using the “Search” facility of the BSI Electronic Catalogue or of BritishStandards Online.

This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application.

Compliance with a British Standard does not of itself confer immunityfrom legal obligations.

— aid enquirers to understand the text;

— present to the responsible international/European committee anyenquiries on the interpretation, or proposals for change, and keepUK interests informed;

— monitor related international and European developments andpromulgate them in the UK.

Summary of pages

This document comprises a front cover, an inside front cover, the EN title page,

pages 2 to 21 and a back cover.The BSI copyright notice displayed in this document indicates when thedocument was last issued.

Amendments issued since publication

Amd. No. Date Comments


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EUROPEAN STANDARD

NORME EUROPÉENNE

EUROPÄISCHE NORM

EN 13141-7

February 2004

ICS 91.140.30

English version

Ventilation for buildings - Performance testing ofcomponents/products for residential ventilation - Part 7:

Performance testing of a mechanical supply and exhaustventilation units (including heat recovery) for mechanicalventilation systems intended for single family dwellings

Ventilation des bâtiments - Essais de performance descomposants/produits pour ventilation des logements -

Partie 7: Essais de performance des bouchesd'alimentation et d'évacuation (y compris la récupération de

chaleur) pour les systèmes des centrales de ventilationmécanique double flux utiliséesen logements individuels

Lüftung von Gebäuden - Leistungsprüfungen vonBauteilen/Produkten für die Lüftung von Wohnungen - Teil

7: Leistungsprüfung von mechanischen Zuluft- undAblufteinheiten (einschließlich Wärmerückgewinnung) für

mechanische Lüftungsanlagen in Einfamilienhäusern

This European Standard was approved by CEN on 22 October 2003.

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 Central Secretariat 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 Central Secretariat has the same status as the officialversions.

CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION

COMIT É E UROPÉ E N DE NORMAL ISAT ION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: rue de Stassart, 36 B-1050 Brussels

© 2004 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.

Ref. No. EN 13141-7:2004: E


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EN 13141-7:2004 (E)

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Contents

page

Foreword......................................................................................................................................................................3

Introduction.................................................................................................................................................................5

1 Scope ..............................................................................................................................................................5

2 Normative references ....................................................................................................................................6

3 Terms, definitions and classification...........................................................................................................63.1 Terms and definitions ...................................................................................................................................63.2 Classification..................................................................................................................................................7

4 Symbols and abbreviations..........................................................................................................................8

5 Requirements.................................................................................................................................................8

6 Test methods..................................................................................................................................................96.1 General............................................................................................................................................................96.2 Performance testing of aerodynamic characteristics................................................................................96.3 Performance testing of thermal characteristics.......................................................................................106.4 Performance testing of acoustic characteristics .....................................................................................106.5 Effective power input ..................................................................................................................................11

7 Test results...................................................................................................................................................117.1 Test report ....................................................................................................................................................117.2 Product specifications ................................................................................................................................12

7.3 Leakages.......................................................................................................................................................127.4 Air flow/pressure curve...............................................................................................................................127.5 Filter by-pass leakage (not applicable to filter classes G1 to G4)..........................................................137.6 Temperature ratios ......................................................................................................................................137.7 Acoustic characteristics .............................................................................................................................137.8 Effective power input ..................................................................................................................................14

Annex A (informative) Examples of operating points, measured values and balancing air flows fortemperature ratio measurements...............................................................................................................19

Bibliography..............................................................................................................................................................21


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EN 13141-7:2004 (E)

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Foreword

This document (EN 13141-7:2004) has been prepared by Technical Committee CEN/TC 156 "Ventilation forbuildings", 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 orby endorsement, at the latest by August 2004, and conflicting national standards shall be withdrawn at the latest by August 2004.

This standard is a part of a series of standards on residential ventilation. It has a parallel standard referring to theperformance characteristics of the components/products for residential ventilation.

The position of this standard in the field of standards for the mechanical building services is shown in Figure 1.

Annex A is informative.

This document includes a bibliography.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark,Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.


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EN 13141-7:2004 (E)

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Mechanical Building Services

Control systems Ventilation and air conditioningsystems

Heating systems

Ductwork Air terminaldevices

Air handlingunits

Mechanical andnatural residential

ventilation

Design criteriafor the indoorenvironment

Systemperformance

Installation

Components/products forresidential ventilationRequired and optional

performancecharacteristics

Performance testing ofcomponents/products for

residential ventilation

Simplified calculationmethods for residential

ventilation systems

Design anddimensioningfor residential

ventilation systems

Performance testingand installation

checks for residentialventilation systems

Part 1: Externally and internally mounted air transfer devices

Part 2: Exhaust and supply air terminal devices

Part 3: Range hoods for residential use

Part 4: Fans used in residential ventilation systems

Part 5: Cowls and roof outlet terminal devices

Part 6: Exhaust ventilation system packages used in a single dwelling

Part 7: Mechanical supply and exhaust ventilation units (includingheat recovery) for mechanical ventilation systems intended for single

family dwellings

Figure 1 — Position of EN 13141-7 in the field of the mechanical building services


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EN 13141-7:2004 (E)

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Introduction

This European Standard specifies methods for the performance testing of components used in residential ventilationsystems to establish the main characteristics as identified in EN 13142.

This European Standard does not contain any information on ductwork and fittings, which are covered by otherEuropean Standards.

This European Standard incorporates many references to other European and International Standards, especially oncharacteristics other than the aerodynamic characteristics, for instance on acoustic characteristics.

In most cases some additional tests or some additional conditions are given for the specific use in residentialventilation systems.

The standard can be used for the following applications:

laboratory testing;

attestation purposes.

1 Scope

This part of EN 13141 specifies the laboratory test methods and test requirements for the testing of aerodynamic,thermal and acoustic performance, and the electrical power of a mechanical supply and exhaust ventilation unit used

in a single dwelling.

In general such a unit contains:

supply and exhaust air fans;

air filters;

air to air heat exchanger with/without air to air heat pump for exhaust air heat recovery;

control system.

Such equipment can be provided in more than one assembly, the separate assemblies of which are designed to beused together.

This standard does not deal with non-ducted units.

The method of testing for the performances of the heat pumps for heat recovery is generally given in EN 255-2 andin ENV 12102. Safety requirements are given in EN 60335-2-40 and EN 60335-2-80.


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2 Normative references

This European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter. For

dated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).

EN 255-2, Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors – Heatingmode – Part 2: Testing and requirements for marking for space heating units.

EN 305, Heat exchangers – Definitions of performance of heat exchangers and the general test procedure forestablishing performance of all heat exchangers.

EN 308, Heat exchangers – Test procedures for establishing performance of air to air and flue gases heat recoverydevices.

EN 1886:1998, Ventilation for buildings – Air handling units – Mechanical performance.

EN 12792, Ventilation for buildings – Symbols, terminology and graphical symbols.

EN 13141-4, Ventilation for buildings – Performance testing of components/products for residential ventilation - Part4: Fans used in residential ventilation systems.

EN ISO 3743-2, Acoustics – Determination of sound power levels of noise sources using sound pressure –Engineering methods for small, movable sources in reverberant fields – Part 2: Methods for special reverberationtest rooms.

EN ISO 3744, Acoustics – Determination of sound power levels of noise sources using sound pressure –

Engineering method in an essentially free field over a reflecting plane (ISO 3744:1994) .

EN ISO 5135, Acoustics – Determination of sound power levels of noise from air terminal devices, air terminal units,dampers and valves by measurement in a reverberation room (ISO 5135:1997).

EN ISO 5136, Acoustics – Determination of sound power radiated into a duct by fans and other air-moving devices –In-duct method (ISO 5136:2003).

EN ISO 9614-1, Acoustics – Determination of sound power levels of noise sources using sound intensity – Part 1:

Measurement at discrete points (ISO 9614-1:1995).

3 Terms, definitions and classificationFor the purposes of this European Standard, the terms and definitions given in EN 12792 together with the followingapply.

3.1 Terms and definitions

3.1.1external leakageleakage to or from the air flowing inside the casing of the unit to or from the surrounding air

3.1.2internal leakage

leakage inside the unit between the exhaust and the supply air flows

3.1.3filter bypass leakageair bypass around filter cells


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3.1.4declared maximum air volume flowdefined to correspond to the declared total pressure of the unit at the maximum setting. If the supply and exhaust airvolume flows are different, then the declared maximum air volume flow is equal to the smaller.

NOTE To set the declared maximum air volume flow, the declared total pressure corresponds to 50 Pa, or to a lower totalpressure if the intended use declared by the manufacturer is less than 50 Pa.

3.1.5temperature ratiotemperature difference between inlet and outlet of one of the air flows divided by the temperature difference betweenthe inlets of both air flows

3.1.6effective power inputaverage electrical power input to the equipment within a defined interval of time, in watts, obtained from:

the power input of the fans;

the power input for operation of any compressor(s) and any power input for defrosting, excluding additionalelectrical heating devices not used for defrosting;

the power input of all control and safety devices of the equipment.

3.1.7test Voltagevoltage to be used for supplying the components during the testing

3.2 Classification

There are four classes of leakage depending of the ratios between both leakage air flows and maximum declared airvolume.

Table 1 — Leakage classification

Class Internal leakage (at 100 Pa) External leakage (at 250 Pa)

1 ≤ 2 % and ≤ 2 %

2 ≤ 5 % and ≤ 5 %

3 ≤ 10 % and ≤ 10 %

not classified > 10 % and > 10 %

Where a test on a single unit results in different classes the product shall receive the higher classification. According

to this the unit has only one leakage class.

The tests for air flow/pressure curve and thermal performances shall not be made if the unit is not classified because

of measurement uncertainty.


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4 Symbols and abbreviations

For the purposes of this European Standard, the symbols and abbreviations given in EN 12792, together with thefollowing, apply.

D Diameter of the measurement duct (see Figure 2) in m

Dh1, D h2 Hydraulic diameters of the connecting duct (see Figure 3) in m

LW

Sound power level in dB

LWA

A-weighted sound power level in dB

ps Static pressure In Pa

P E Effective power input in W

ptU Total pressure difference between the outlet and the inlet of the unit in Pa

ptUd

Declared total pressure difference between the outlet and the inlet of the unit in Pa

qm Mass air flow rate in kg/s or g/s

qv Volume flow rate in m

3/s or l/s

qvd

Declared maximum air volume flow rate in m3/s or l/s

qve

External leakage air volume flow rate in m3/s or l/s

qvi Internal leakage air volume flow rate in m

3/s or l/s

v Air velocity in the measurement duct (see Figure 3) in m/s

Indice 11 means exhaust air inlet (see Figure 2).

Indice 12 means exhaust air outlet (see Figure 2).

Indice 21 means supply air inlet (see Figure 2).

Indice 22 means supply air outlet (see Figure 2).

5 Requirements

The characteristics shall be tested, measured, or calculated according to EN 13142.

In addition, to assess correctly the thermal performance, aerodynamic characteristics, including all leakages, shallbe tested before or together with any thermal characteristics testing (see 6.3).

Aerodynamic characteristics (see 6.2) include:

- external leakage;

- internal leakage;

- air flow/pressure curve;

- filter bypass leakage.


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6 Test methods

6.1 General

Tests shall be conducted with a unit containing all components as supplied for intended use, and installed accordingto the manufacturer's instructions.

The mass flows qm11 and qm22 shall be balanced to within 3 % unless the manufacturer specifies otherwise.

For units which are intended to be used in dwellings of different sizes (e.g. 4, 5 or 6 rooms), the tests shall be made

in the “maximum” configuration (i.e. 6 rooms).

Where a single value is assigned by the manufacturer as rated voltage, this shall be the test voltage. Where a

voltage range is assigned to the product by the manufacturer that includes 230 V, the test shall be conducted at

230 V. This voltage shall be maintained throughout the testing to ± 1 %.

6.2 Performance testing of aerodynamic characteristics

6.2.1 Leakages

The external and internal leakage shall be tested according to EN 308. For heat exchanger category III

(regenerators), both tracer gas and pressurisation tests with the regenerating heat exchanger in operation shall be

done.

The external leakage air volume flow qve at over- and under-pressure of 250 Pa shall be reported as such and also

compared to the declared maximum air volume flow of the unit as a percentage.

At least three different measurement points evenly distributed shall be made between 100 Pa and 300 Pa, and

reported by means of a curve.

The internal leakage air volume flow qvi at a pressure difference of 100 Pa shall be reported as such and also

compared to the declared maximum air volume flow of the unit as a percentage.

Different measurement points shall be made between 50 Pa and 200 Pa, and reported on a curve.

During the pressurisation tests, the fans of the unit under test shall be switched off.

6.2.2 Air flow/pressure curve

The air flow/pressure characteristic, for both supply and exhaust air flows, shall be determined according to

EN 13141-4.

Tests shall be made in accordance with category D installation (ducted inlet and outlet) as defined in EN 13141-4. The

fans shall be switched on.

Total pressure (difference between the outlet and the inlet) of the unit ptu at different air volume flows qv and at

different fan control adjustments shall be reported, at least at the test voltage.

Examples of test installations for single inlet/outlet units and for multiple inlets/outlets units are given in

Figures 2 and 3.

If a connection box is used, it shall be sufficiently described in the test report.

6.2.3 Filter bypass leakage (not applicable to filter classes G1 to G4)

The filter bypass leakage characteristic and classification shall be determined according EN 1886:1998, clause 6,

but with a reference test pressure difference determined as follows:


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first, the pressure difference is measured across the filter as supplied with the unit, at the maximum declared airvolume flow rate (see 5.2);

then, specify the reference pressure difference is double than this pressure difference but not less than 25 Pa.

6.3 Performance testing of thermal characteristics

6.3.1 Temperature ratios

Temperature ratios shall be determined according to EN 308. However pressure conditions during measurementsshall be according to Figures 2 and 3. The ambient temperature of the unit shall be maintained at + 22 °C ± 3 °C.

Temperature ratios for supply and exhaust air shall be measured at different operating points according to Figure 4,

and shall be reported. Temperatures shall be measured with an even flow profile according to EN 305 and EN 308;

as well as any test installation recommendations.

The different operating points are defined at minimum PtU = 50 Pa and depending on the position of the minimum

air volume flow compared to the maximum air volume flow (see Figure 4), as follows:

if the minimum air volume flow is greater than 50 % of the maximum air volume flow, only two operatingpoints are required (minimum and maximum air volume flows);

if the minimum air volume flow is less than 50 % of the maximum air volume flow, three operating points arerequired (minimum, one between minimum and maximum, and maximum air volume flows).

If the fan setting is not continuous, the closest value upper than 50 Pa shall be chosen.

Examples of operating points, measured values and balancing air flows for temperature ratio measurements are

given in annex A.

No correction, for the power input of the fans or other components, to the temperature ratio shall be made.

Heaters of the unit shall not operate during the tests.

6.3.2 Operation at low outdoor temperatures

If the unit is designed to operate in a cold climate (design or reference outdoor winter temperature - 10 °C or below),

the additional test described in EN 308 shall be made.

6.4 Performance testing of acoustic characteristics

6.4.1 Noise radiated through the casing of the unit

The acoustic measurements shall be carried out according to the standard EN ISO 3743-2, EN ISO 3744 or EN ISO

9614-1.

The unit shall be installed according to the manufacturer's instructions.

The outside of the ducts shall be insulated to reduce the sound power radiated from the ducts.

Sound power levels shall be determined at the declared maximum air volume flow. The following data shall be

included in the report:

sound power levels LW

A-weighted sound power levels LWA

sound power levels in octave bands


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declared maximum air volume flow qvd

An example of a test installation is given in Figure 5.

6.4.2 Sound power level in duct connections of the unit

The acoustic measurements shall be carried out either in reverberant room according to the recommendation of

EN ISO 5135 by identifying the unit as a terminal unit, or in duct according to EN ISO 5136.

The unit shall be installed according to the manufacturer's instructions.

Sound power levels at each duct connection of the unit shall be determined at the declared maximum air volume

flow. The connecting ducts shall be rigid and insulated to limit losses by transmission ". The following data should be

included in the report:

sound power levels LW

A-weighted sound power levels LWA

sound power levels in octave bands

declared maximum air volume flow qvd

Figure 6 gives an example of test installation using EN ISO 5135.

For units with two inlets/outlets, only one measurement for the inlets and one measurement for the outlets shall bemade with all the duct connections connected to the room. Then the sound power level at each duct connection shallbe calculated using the global result and supposing that the connections would be equivalent.

For multiple inlets/outlets units (more than two), one test shall be made for each type of inlet/outlet.

The measurement equipment shall be in accordance with EN ISO 3743-2.

An example of a test installation for a unit with multiple inlets/outlets is given in Figure 7.

6.5 Effective power input

The effective power input P E shall be measured, according to EN 255-2 during the test specified in 6.3.1, and

reported.

7 Test results

7.1 Test report

The test report shall include at least the following information:

a) name and address of testing laboratory and location where the test was carried out when different from theaddress of the testing laboratory;

b) unique identification of report (such as serial number) and of each page, and total number of pages of thereport;

c) name and address of the client;

d) description and identification of the test item (including the position of the fan);

e) date of receipt of test item and date(s) of performance of test;


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f) identification of the test specification or description of the procedure;

g) description of the sampling procedure, where relevant;

h) any deviations, additions to or exclusions from the test specification, and any other information relevant to a

specific test;

i) identification of any non-standard test method or procedure utilised;

j) measurements, examinations and derived results, supported by tables, graphs, sketches and photographsas appropriate, and any failures identified; (see 7.2 to 7.8)

k) a statement on measurement uncertainty (where relevant);

l) a signature and title or an equivalent marking of person(s) accepting technical responsibility for the testreport and date of issue;

m) a statement to the effect that the results are only for the items tested.

7.2 Product specifications

The equipment specification shall be given as follows:

declared maximum air volume flow: qvd in m3/s or l/s;

declared total pressure : ptUd in Pa.

7.3 Leakages

The equipment leakages established in accordance with 6.2.1 shall be given as follows:

external leakage: qvd in m3/s or l/s;

external leakage/declared maximum flow rate: qve / qvd in %;

internal leakage: qvi in m3/s or l/s;

internal leakage/declared maximum flow rate: qvi / qvd in %;

external leakage/pressure curve;

internal leakage/pressure curve;

leakage class.

7.4 Air flow/pressure curve

The air flow/pressure characteristic established in accordance with 6.2.2 for supply and exhaust air flows, for eachvoltage and for each setting shall be recorded as follows:

total pressure difference between the outlet and the inlet of the unit: ptU

in Pa;

air volume flow: qv

in m3/s or l/s.

For the same voltage, the results obtained for the different settings are drawn as curves, on the same figure.

A description of the connection box, if used, shall also be given.


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7.5 Filter by-pass leakage (not applicable to filter classes G1 to G4)

The filter by-pass leakage specification established in accordance with 6.2.3 shall be given as follows:

filter class;

filter by-pass leakage in m3/s or l/s;

filter by-pass leakage/declared maximum flow rate in %;

acceptable filter class, according to Table 4 of EN 1886:1998.

7.6 Temperature ratios

The temperature ratios shall be reported at every operating point in accordance with 6.3.1:

temperature ratio for supply air without condensation;

temperature ratio for exhaust air without condensation;

temperature ratio for supply air with condensation;

temperature ratio for exhaust air with condensation.

The following additional information shall be provided for cold climates as specified in 6.3.2:

temperature ratio for supply air may be given;

temperature ratio for exhaust air may be given;

observations of the influence of freezing and condensation on the operation of the heat recovery unit and thecondensation water outlet according to EN 308.

Temperature ratios shall always be stated together with the leakage class of the unit (see 3.2).

Every operating point shall be recorded with all relevant information (air flows, pressure conditions, humidity values,temperature…).

7.7 Acoustic characteristics

For the assessment of noise radiated through the casing of the unit in accordance with 6.4.1, the presentation of the

results shall include:

test method;


declared total pressure: ptUd in Pa;

sound power levels by octave band:LW in dB;

A-weighted sound power level: LWA in dB.

For the sound power level at the duct connections of the unit in accordance with 6.4.2, the presentation of the results

shall include:

test method;



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declared total pressure: ptUd in Pa;

and for each duct connection:

sound power levels by octave band:LW in dB;

A-weighted sound power level: LWA in dB.

7.8 Effective power input

For the effective power input the following results shall be reported at each operating point according to 6.5.

list of the major electrical components of the unit:

total effective power input P E in W;

specific effective power input: P E /qvd in kW/(m3/s) or W/(l/s).

Key

1 Pressure measurement 5 Supply

2 Temperature and humidity measurement 6 Perforated plate

3 Unit under test 7 Connection

4 Exhaust

Figure 2 - Example of test installation: single inlet/outlet unit


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Key

1 Connection box 4 D so that v ≤ 2 m/s

2 Supply 5 1 to 2 DH2

3 Exhaust 6 DH2

Figure 3 - Example of test installation: multiple inlet/outlet unit


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System Curve - If only one setting (or fan speed):

Pt 1 and Pt 2

- If more than one setting (or fan speed): Pt 1 and Pt 2'or Pt 2''

Operating point 2'' shall not be exactly positioned on thesystem curve if the setting is made throughdiscontinuous values.

Pt 2'' is positioned on the system curve, when the settingis continuous.

System Curve - If only one setting (or fan speed): Pt 1, Pt 2 and Pt 3

- If more than one setting (or fan speed): Pt 1, Pt 2' andPt 3'

Operating points 2' and 3' shall not be exactly positionedon the system curve if the setting is made throughdiscontinuous values.

If continuous setting, then, as previous case, thereshould be points 2'' and 3''.

Figure 4 - Definition of the measuring points for the temperature ratios


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Key

1 Insulated rigid duct (to reduce noise emission)

2 Minimum length as possible

3 Reverberant room

4 Unit under test

Figure 5 – Example of test installation for measuring the noise production through the casing of the unit


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Key

1 Unit

2 Insulated rigid duct (to reduce noise emission), length = 1,5 m

3 Reverberant room

4 Min. 1 m (from all surfaces)

Figure 6 - Example of test installation for measuring the sound power level at the connections ofthe unit

Key

1 Min. 1m (from all surfaces) 6 Exhaust

2 Unit 7 Ex. three inlets

3 Insulated rigid duct (to reduce noise emission) length = 1,5 m 8 Ex. two outlets

4 Duct connections under test

5 Supply

Figure 7 - Example of test installation for measuring the sound power level at the connections of a multipleinlets/outlets unit


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Annex A(informative)

Examples of operating points, measured values and balancing air flows fortemperature ratio measurements

0 10 20 30 40 50 60 70 80 90 100 110 120

350

300

250

200

150

100

50

0

4

3

2

1

5

Y

X

Key

Operating point, decl. max.air flow 75 l/s, air flow 58 l/s, min. air flow 25 l/so Exhaust airx Supply air

X Air volumeflow in dm3/s 3 Setting 3Y Pressure of the unit, Pa 4 Setting 41 Setting 1 5 System curve2 Setting 2

350

300

250

200

150

100

50

0

0 10 20 30 40 50 60 70 80 90 100 110 120

1

2

3

Y

X

Key

Operating point, decl. max. air flow 90 l/s, min. air flow 58 l/s

o Exhaust air

x Supply air 1 Setting 1

X Air volumeflow in dm3

/s 2 Setting 2Y Pressure of the unit, Pa 3 Setting 3

Figure A.1 — Definition of the operating points for measuring the temperature ratios of a mechanical supplyand exhaust ventilation with different settings


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0 10 20 30 40 50 60 70 80 90 100 110 120

350

300

250

200

150

100

50

0

1

X

Y

Key

Operating point, decl.max. air flow 82 l/s, min. air flow 50 l/s

o Exhaust air

x Supply air

X Air volume flow in dm3/s

Y Pressure of the unit, Pa

1 System curve

Figure A.2 — Definition of the operating points for measuring the temperature ratios of a mechanical supplyand exhaust ventilation with one setting (or fan speed)


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Bibliography

EN 306, Heat exchangers – Methods of measuring the parameters necessary for establishing the performance.

EN 814-2, Air conditioners and heat pumps with electrically driven compressors – Cooling mode – Part 2: Testingand requirements for marking.

ENV 12102, Air conditioners, heat pumps and dehumidifiers with electrically driven compressors - Measurement ofairborne noise - Determination of the sound power level .

EN 60335-2-40, Household and similar electrical appliances - Safety – Part 2-40: Particular requirements forelectrical heat pumps, air conditioners and dehumidifiers (IEC 60335-2-40:2002, modified) .

EN 60335-2-80, Household and similar electrical appliances - Safety – Part 2-80: Particular requirements for fans(IEC 60335-2-80:2002) Note: Endorsement notice.


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BSI

389 Chiswick High Road

London

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BSI — British Standards Institution

BSI is the independent national body responsible for preparingBritish Standards. It presents the UK view on standards in Europe and at theinternational level. It is incorporated by Royal Charter.

Revisions

British Standards are updated by amendment or revision. Users ofBritish Standards should make sure that they possess the latest amendments oreditions.

It is the constant aim of BSI to improve the quality of our products and services.We would be grateful if anyone finding an inaccuracy or ambiguity while usingthis British Standard would inform the Secretary of the technical committeeresponsible, the identity of which can be found on the inside front cover.Tel: +44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400.

BSI offers members an individual updating service called PLUS which ensuresthat subscribers automatically receive the latest editions of standards.

Buying standards

Orders for all BSI, international and foreign standards publications should beaddressed to Customer Services. Tel: +44 (0)20 8996 9001.Fax: +44 (0)20 8996 7001. Email: [email protected]. Standards are alsoavailable from the BSI website at http://www.bsi-global.com.

In response to orders for international standards, it is BSI policy to supply theBSI implementation of those that have been published as British Standards,unless otherwise requested.

Information on standards

BSI provides a wide range of information on national, European andinternational standards through its Library and its Technical Help to ExportersService. Various BSI electronic information services are also available which give

details on all its products and services. Contact the Information Centre.Tel: +44 (0)20 8996 7111. Fax: +44 (0)20 8996 7048. Email: [email protected].

Subscribing members of BSI are kept up to date with standards developmentsand receive substantial discounts on the purchase price of standards. For detailsof these and other benefits contact Membership Administration.Tel: +44 (0)20 8996 7002. Fax: +44 (0)20 8996 7001.Email: [email protected].

Information regarding online access to British Standards via British StandardsOnline can be found at http://www.bsi-global.com/bsonline.

Further information about BSI is available on the BSI website athttp://www.bsi-global.com.

Copyright

Copyright subsists in all BSI publications. BSI also holds the copyright, in theUK, of the publications of the international standardization bodies. Except aspermitted under the Copyright, Designs and Patents Act 1988 no extract may bereproduced, stored in a retrieval system or transmitted in any form or by anymeans – electronic, photocopying, recording or otherwise – without prior writtenpermission from BSI.

This does not preclude the free use, in the course of implementing the standard,of necessary details such as symbols, and size, type or grade designations. If thesedetails are to be used for any other purpose than implementation then the priorwritten permission of BSI must be obtained.

Details and advice can be obtained from the Copyright & Licensing Manager.Tel: +44 (0)20 8996 7070. Fax: +44 (0)20 8996 7553.Email: [email protected].

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BS EN 13141-7 2004 VENTILATION FOR BUILDINGS.pdf

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