EN 13141-7:2010

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.HYDOQLKHLüftung von Gebäuden - Leistungsprüfungen von Bauteilen/Produkten für die Lüftng von Wohnungen - Teil 7: Leistungsprüfung von mecanischen Zuluft- und Ablufteinheiten (einschließlich Wärmerückgewinnung) für mecanische Lüftungsanlagen in EinfamilienhäusernVentilation dans les bâtiments - Essais de performance des composants/produits pour la ventilation des logements - Partie 7: Essais de performance des bouches d'alimentation et d'évacuation (y compris la récupération de chaleur) pour les systèmes de ventilation mécaniques prévus pour des logements individuelsVentilation for buildings - Performance testing of components/products for residential ventilation - Part 7: Performance testing of a mechanical supply and exhaust ventilation units (including heat recovery) for mechanical ventilation systems intended for single family dwellings91.140.30VLVWHPLVentilation and air-conditioningICS:Ta slovenski standard je istoveten z:EN 13141-7:2010SIST EN 13141-7:2011en,fr01-maj-2011SIST EN 13141-7:2011SLOVENSKI
STANDARDSIST EN 13141-7:20041DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 13141-7
November 2010 ICS 91.140.30 Supersedes EN 13141-7:2004English Version
Ventilation for buildings - Performance testing of components/products for residential ventilation - Part 7: Performance testing of a mechanical supply and exhaust ventilation units (including heat recovery) for mechanical ventilation systems intended for single family dwellings
Ventilation des bâtiments - Essais de performance des composants/produits pour la ventilation des logements - Partie 7: Essais de performance des centrales double flux (y compris la récupération de chaleur) pour les systèmes de ventilation mécaniques prévus pour des logements individuels
Lüftung von Gebäuden - Leistungsprüfungen von Bauteilen/Produkten für die Lüftung von Wohnungen - Teil 7: Leistungsprüfung von mechanischen Zuluft- und Ablufteinheiten (einschließlich Wärmerückgewinnung) für mechanische Lüftungsanlagen in Wohneinheiten (Wohnung oder Einfamilienhaus) This European Standard was approved by CEN on 25 September 2010.
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 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 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 © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13141-7:2010: ESIST EN 13141-7:2011

Example of some possible arrangements of heat recovery heat exchanger and/or heat pumps for category I . 26Annex B (normative)
Pressure leakage test method . 28B.1External leakage. 28B.2Internal leakage test . 28Annex C (normative)
Tracer gas test method . 30C.1General method for rating purposes . 30C.2Augmented method for measuring instantaneous recirculation of ducted units under different operating conditions
(optional) . 31C.3Testing orders for tracer gas tests . 32Bibliography . 36
Compared to the 2004 version, changes have been made to the following (sub)clauses, tables and annexes:  modification of the test temperatures to be similar to those of heat pump;  possibility of measuring supply and exhaust ventilation and heat pump;  suppression of reference to EN 308 for heat exchangers particular test conditions, this standard define its own conditions;  introduction of tracer gas method for leakages;  dependence of leakages under/over pressure configurations on fan position in airflow;  obligation of reporting the two temperature ratios (on exhaust and supply air);  possibility of doing an optional test by measuring on the outdoor side of the building while the measure is made on the inside side of the building in the mandatory test (exhaust and supply air flow rate);  possibility of giving humidity ratios, like for PAC, this allowed to test enthalpy heat exchangers;  review of value for balanced mass flows at 3 %, over 3% declaration of unbalanced unit and report of the disbalance value;  setting of the declared maximum air volume flow at 50 Pa by default in lack of other declaration;  addition of the declared minimum air volume flow at Ptud/2 and minimum setting;  creation of a reference point at Ptud/2 and 70 % of declared maximum air volume flow;  correction of the temperature ratios considering flow rate ratios. This standard is a part of a series of standards on residential ventilation. It has a parallel standard referring to the performance 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. 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 13141-7:2011

Mechanical Building Services
Control systems
Ventilation and air conditioning systems
Heating systems
Ductwork
Air terminal devices
Air handling units
Mechanical and natural residential ventilation
Design criteria for the indoor environment
System performance
Installation
Components/products for residential ventilation Required and optional performance characteristics
Performance testing of components/products for residential ventilation
Simplified calculation methods for residential ventilation systems
Design and dimensioning for residential ventilation systems
Performance testing and installation checks for residential ventilation 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 (including heat recovery) for mechanical ventilation systems intended for single
family dwellings
Part 8: Performance testing of un-ducted mechanical supply and exhaust ventilation units (including heat recovery) for mechanical
ventilation systems intended for a single room
Part 9: Externally mounted humidity controlled air transfer device
Part 10: Humidity controlled extract air terminal device
Figure 1 — Position of EN 13141-7 in the field of the mechanical building services
This standard does not deal with units that supply several dwellings. This standard does not cover ventilation systems that may also provide water space heating and hot water. This standard does not cover units including combustion engine driven compression heat pumps and absorption heat pumps. Electrical safety requirements are given in EN 60335-2-40 and EN 60335-2-80. SIST EN 13141-7:2011

3.1.5 declared minimum air volume flow air volume flow corresponding to Ptud/2 Pa at the minimum setting for standard air conditions (20 °C, 101325 Pa)
3.1.6 Ptud/2 declared total pressure difference between the outlet and the inlet of the unit 3.1.7 temperature ratio temperature difference between inlet and outlet of one of the air flows divided by the temperature difference between the inlets of both air flows 3.1.8 electric power input average 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 additional electrical heating devices not used for defrosting;  the power input of all control and safety devices of the equipment 3.1.9 test voltage voltage to be used for supplying the components during the testing 3.1.10 humidity ratio difference of water content between inlet and outlet of one of the air flows divided by the difference of water content between the inlets of both air flows 3.1.11 recirculation fraction (R) mass fraction of the discharged air to a zone (see Figure 2: from key 4 (extract) to key 5 (supply)) that is actually recirculated air from the same zone, due to internal leakage, external casing leakage and local short-circuiting
Category I: Recuperative heat exchangers (e.g. air-to-air plate or tube heat exchanger) Recuperative heat exchangers are designed to transfer thermal energy (sensible or total) from one air stream to another without moving parts. Heat transfer surfaces are in form of plates or tubes. This heat exchanger may have parallel flow, cross flow or counterflow construction or a combination of these. Plate and tube heat exchangers with vapour diffusion (for instance cellulose) are also in this category. Category II: Regenerative heat exchangers (e.g. rotary or reciprocating heat exchanger) A rotary heat exchanger is a device incorporating a rotating “thermal wheel” for the purpose of transferring energy (sensible or total) from one air stream to the other. It incorporates material allowing latent heat transfer, a drive mechanism, a casing or frame, and includes any seals which are provided to retard bypassing and leakage or air from one air stream to the other. Regenerative heat exchangers have varying degrees of moisture recovery, depending on the material used (e.g. "condensation rotor/non hygroscopic rotor", "hygroscopic rotor" and 'sorption rotor" heat exchangers). SIST EN 13141-7:2011

in m LW Sound power level
in dB LWA A-weighted sound power level
in dB ps Static pressure In Pa PE 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-1 or g.s-1 qv Volume flow rate in m 3 .s-1 or l.s-1 qvn Nominal air volume flow in m 3 .s-1 or l.s-1 qvd Declared maximum air volume flow rate in m 3 .s-1 or l.s-1 qve External leakage air volume flow rate in m 3 .s-1 or l.s-1 qvi Internal leakage air volume flow rate in m 3 .s-1 or l.s-1 R Recirculation fraction, measured with tracer gas test.
- V Air velocity in the measurement duct (see Figure 3)
in m.s-1 θ Air temperature in °C x water content
in kg water / kg dry air 21 22 11 12 Outdoor air (see Figure 2) Supply air (see Figure 2) Extract air (see Figure 2) Exhaust air (see Figure 2)
ηθ, ex Temperature ratio of the unit on exhaust air side
ηθ, su Temperature ratio of the unit on supply air side
ηx, ex Humidity ratio of the unit on exhaust air side
ηx, su Humidity ratio of the unit on supply air side
5 Requirements To set the declared maximum air volume flow, the declared total pressure shall correspond to 100 Pa, or to a lower total pressure if the intended use declared by the manufacturer is less than 100 Pa. The declared maximum air volume flow shall be equal to the smaller if the supply and extract air volume flows are different.
In addition, to assess correctly the thermal performance, aerodynamic characteristics, including all leakages, shall be tested before or together with any thermal characteristics testing (see 6.3). SIST EN 13141-7:2011

Table 1 — Classification requirements for thermal performance
Supply fan upstream and exhaust fan downstream of the heat exchanger or
Exhaust fan upstream and supply fan downstream
of the heat exchangera Other fan positions required class to allow measurements Class A1, A2, B1, B2, C1, C2
All classified units a This configuration is not recommended for good Indoor air quality.
The manufacturer shall declare:  maximum air volume flow;  maximum disbalance air flow;
 declared total pressure difference of the unit;  minimum air volume flow;  minimum outside operation temperature;  filter classes supply and exhaust air;  balancing of air volume flows;  presence of by-pass and its control;  frost protection function and control (for cold climate test). 6 Test methods 6.1 General Tests shall be conducted with a unit containing all components as supplied for intended use, and installed according to the manufacturer's instructions. 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). SIST EN 13141-7:2011

(at 100 Pa)
External leakage (at 250 Pa) A1 ≤ 2 % and ≤ 2 % A2 ≤ 5 % and ≤ 5 % A3 ≤ 10 % and ≤ 10 % not classified > 10 % or > 10 %
The external and internal leakage shall be measured according to Annex B.
The external leakage air volume flow qve at over and/or under pressure of 250 Pa, according to Table 3, 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. Both over pressure and under pressure shall be reported. If one of these tests is not required (see Table 5), the report shall then mention “not required”. Table 3 — Pressure conditions during external leakage test Supply fan position Upstream of the heat exchanger upstream of the heat exchanger downstream of the heat exchanger downstream of the heat exchanger Exhaust fan position upstream of the heat exchanger downstream of the heat exchanger upstream of the heat exchanger downstream of the heat exchanger Tests conditions for external leakages over-pressure over and under-pressure over and under-pressure under-pressure
Table 5 — Leakage classification – in-duct tracer gas method Class
Tracer gas test
Pressurisation test Internal Recirculated fraction from extract to supply air (Rs,int)
External leakage (at 250 Pa) C1 ≤ 0,5 % and ≤ 2 % C2 ≤ 2 % and ≤ 2 % C3 ≤ 4 % and ≤ 2 % not classified > 4 % or > 2 %
Concerning internal recirculated fraction from extract to supply air, air flow shall be measured according to 6.2.2 at the declared maximum air volume flow. Where a test on a single unit results in different classes the product shall receive the worst classification. According to this the unit has only one leakage class. SIST EN 13141-7:2011

Key 1 pressure measurement
5 supply 2 temperature and humidity measurement
6 perforated plate 3 unit under test
7 connection 4 extract
8 exhaust
9 outdoor air Figure 2 — Test installation and test conditions for single inlet/outlet unit SIST EN 13141-7:2011

Key 1 connection box
5 1 to 2 DH2 2 extract
6 DH2 3 supply
7 exhaust 4 D so that v ≤ 2 m.s-1
8 outdoor air Figure 3 — Test installation and test conditions for multiple inlet/outlet unit 6.2.3 Filter bypass
The filter bypass leakage characteristic should be determined with a visual inspection including all the following details:  Design and construction of the air filter
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