EN 17887-2:2024

SLOVENSKI STANDARD
01-julij-2024
Toplotne značilnosti stavb - Preskušanje dokončanih stavb na mestu vgradnje - 2.
del: Analiza podatkov v stanju dinamičnega ravnovesja za preskus skupnih
toplotnih izgub
Thermal performance of buildings - In situ testing of completed buildings - Part 2:
Steady-state data analysis for aggregate heat loss test
Thermische Leistung von Gebäuden - In-situ-Tests von fertiggestellten Gebäuden -
Steady-State-Datenanalyse für Gesamtwärmeverlusttest
Performance thermique des bâtiments - Essais in situ des bâtiments achevés - Partie 2 :
Analyse des données en régime stationnaire pour l’essai de déperdition thermique
globale
Ta slovenski standard je istoveten z: EN 17887-2:2024
ICS:
91.120.10 Toplotna izolacija stavb Thermal insulation of
buildings
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 17887-2
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2024
EUROPÄISCHE NORM
ICS 91.120.10
English Version
Thermal performance of buildings - In situ testing of
completed buildings - Part 2: Steady-state data analysis for
aggregate heat loss test
Performance thermique des bâtiments - Essais in situ Wärmetechnisches Verhalten von Gebäuden - In-situ-
des bâtiments achevés - Partie 2 : Analyse des données Prüfung an fertiggestellten Gebäuden - Teil 2:
en régime stationnaire pour l'essai de déperdition Auswertung stationärer Daten für die Prüfung des
thermique globale Gesamtwärmeverlustes
This European Standard was approved by CEN on 27 February 2024.

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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17887-2:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references. 5
3 Terms, definitions and symbols . 5
3.1 Terms and definitions . 5
3.2 Symbols . 7
4 Principle . 9
5 Uncertainty . 9
6 Input data . 10
6.1 Raw data . 10
6.2 Irregularities and gaps in the data . 10
6.3 Cleaning data . 11
6.4 Filtering (averaging) . 11
6.5 Checking averaged data . 11
7 Data analysis. 12
7.1 General . 12
7.2 Simple linear regression using the Siviour method . 13
7.3 Multiple linear regression (MLR) techniques . 13
7.3.1 General . 13
7.4 Validation: residuals analysis . 14
7.5 Normality of residuals . 14
7.6 Autocorrelation test. 16
8 Test report . 17
8.1 General . 17
8.2 Data on the measured building/ structure. 17
8.3 Description of the experimental set-up . 17
8.4 Conditions during measurement . 17
8.5 Data pre-processing . 18
8.6 Aggregate heat transfer coefficient and associated uncertainties estimation . 18
8.7 Supplementary and supporting measurements . 19
Annex A (normative) Limitations and sources of errors . 20
Annex B (normative) Process for estimating experimental uncertainty . 24
Annex C (normative) Data analysis methods . 30
Annex D (informative) Example of completed building heat loss test data analysis . 39
Annex E (informative) Practical recommendations . 50
Bibliography . 52

European foreword
This document (EN 17887-2:2024) has been prepared by Technical Committee CEN/TC 89 “Thermal
performance of buildings and building components”, the secretariat of which is held by SIS.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by November 2024, and conflicting national standards shall be withdrawn
at the latest by November 2024.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards body. A
complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations 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, Republic of North Macedonia, Romania,
Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United Kingdom.
Introduction
EN 17887-1 describes a test methodology that enables the actual in situ completed building aggregate heat loss
(building heat transfer coefficient) to be quantified. This test method is termed the aggregate heat loss test
method. The building heat transfer coefficient is defined in EN ISO 13789 as the sum of the transmission and
ventilation heat transfer coefficients. The transmission heat transfer coefficient is defined in EN ISO 13789 as
the heat flow rate due to thermal transmission through the fabric of a building, divided by the difference
between the environment temperatures on either side of the construction. The ventilation heat transfer
coefficient is defined in EN ISO 13789 as the heat flow rate due to air entering a conditioned space either by
infiltration or ventilation, divided by the temperature difference between the internal air and the supply air
temperature. In this method, only the heat flow rate via infiltration is considered.
This document principally covers numerical methods based on steady-state linear regression techniques. The
results obtained using these methods are only valid under the assumption that, in first approximation, the data
can be described by these mathematical and physical laws. Statistical tests to check the validity of these
assumptions are therefore given. It also results in the determination of an aggregate building heat transfer
coefficient for the tested building, along with the uncertainty associated with this coefficient. Both the aggregate
building heat transfer coefficient and its uncertainty can be calculated as an output of this document. The
reporting format relating to the test data and the resulting analysis is also described.
This document is highly linked with EN 17887-1 to which it applies exclusively. It is also complimentary to
EN 17888-1 which deals exclusively with opaque building structures especially built for the purpose of in situ
testing.
This document describes the input data required to undertake the analysis, various statistical methods that can
be used to analyse the data, the uncertainty associated with the measurements, and the reporting format.
The data analysis methods described are only applicable to data sets that have been recorded in an unoccupied
building. Although the analysis method does take account of solar radiation gains, the method is also not
suitable for predicting solar gains in order to correct space heating demand.
Detailed requirements concerning the test procedure and the data recording are specified in EN 17887-1.
1 Scope
This document specifies the steady-state data analysis methods to evaluate the data from ‘the aggregate heat
loss test’. These analysis methods enable the actual in situ aggregate heat loss (building heat transfer coefficient)
to be estimated.
NOTE The aggregate heat loss method is specified in EN 17887-1:2024.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements 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.
ISO 5479, Statistical interpretation of data — Tests for departure from the normal distribution
EN 17887-1:2024, Thermal performance of buildings — In situ testing of completed buildings — Part 1: Data
collection for aggregate heat loss test
3 Terms, definitions and symbols
For the purposes of this document, the following terms, definitions and symbols apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1 Terms and definitions
3.1.1
aggregate heat transfer coefficient
sum of the transmission and infiltration component of the ventilation heat transfer coefficient based upon
measurement according to this test standard
3.1.2
external (internal) air temperature
temperature of the external (internal) air measured by external (internal) air temperature sensor
3.1.3
heat transfer coefficient
heat fl
...