CEN/TR 13582:2025

SLOVENSKI STANDARD
01-november-2025
Nadomešča:
SIST-TP CEN/TR 13582:2021
Vgradnja merilnikov toplote - Smernice za izbiro, vgradnjo in delovanje merilnikov
toplote
Installation of thermal energy meters - Guidelines for the selection, installation and
operation of thermal energy meters
Installation von thermischen Energiemessgeräten - Richtlinien für Auswahl, Installation
und Betrieb von thermischen Energiemessgeräten
Compteur d’énergie thermique Installation — Lignes directrices pour la sélection,
l’installation et le fonctionnement des compteurs d’énergie thermique
Ta slovenski standard je istoveten z: CEN/TR 13582:2025
ICS:
17.200.10 Toplota. Kalorimetrija Heat. Calorimetry
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN/TR 13582
TECHNICAL REPORT
RAPPORT TECHNIQUE
September 2025
TECHNISCHER REPORT
ICS 17.200.10 Supersedes CEN/TR 13582:2021
English Version
Installation of thermal energy meters - Guidelines for the
selection, installation and operation of thermal energy
meters
Compteur d'énergie thermique Installation - Lignes Installation von thermischen Energiemessgeräten -
directrices pour la sélection, l'installation et le Richtlinien für Auswahl, Installation und Betrieb von
fonctionnement des compteurs d'énergie thermique thermischen Energiemessgeräten

This Technical Report was approved by CEN on 11 August 2025. It has been drawn up by the Technical Committee CEN/TC 176.

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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 13582:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Selecting a metering device for thermal energy . 7
4.1 General. 7
4.2 Metrological characteristics . 8
4.3 Environmental classifications . 8
5 Dimensioning . 8
5.1 General. 8
5.2 Determining the thermal power . 9
5.3 Thermal energy load . 9
5.3.1 Standard thermal energy load in new builds . 9
5.3.2 Thermal energy load of buildings with no standard load calculation . 9
5.4 Thermal power for water heating . 10
5.5 Thermal power for ventilation and air conditioning systems. 11
5.6 Thermal power for cooling systems . 11
5.7 Thermal power for engineering purposes . 11
6 Determining the flow rate . 11
6.1 Principles of thermodynamics . 11
6.1.1 General. 11
6.1.2 Total maximum power for heating or cooling . 12
6.1.3 Inlet and outlet temperature . 12
6.1.4 Thermal coefficient . 13
7 Selecting a flow sensor for a thermal energy meter . 13
8 Checking the flow sensor design after commissioning . 13
8.1 General. 13
8.2 Operating conditions . 14
8.3 Flow sensors . 14
8.3.1 General. 14
8.3.2 Inlet and outlet pipes . 14
8.3.3 Influence of insufficient temperature mixing on measuring accuracy . 15
8.3.4 Measurement deviations due to flow disturbances caused by swirl . 15
8.3.5 Measurement deviations due to pulsation . 15
8.3.6 Measurement deviations due to the contamination of the thermal conveying medium . 15
8.3.7 Types of flow sensor . 15
8.4 Temperature sensors . 20
8.4.1 General. 20
8.4.2 Measurement deviations due to differential pressure and temperature difference . 21
8.4.3 Using pockets. 22
8.4.4 Surface mounted temperature sensors . 23
8.5 Calculators . 23
8.5.1 General . 23
8.5.2 Functionality . 23
8.5.3 Selecting a calculator. 23
8.5.4 Fast-response thermal energy measurement . 23
9 Arranging of meters for thermal energy . 24
9.1 General . 24
9.2 Environment . 24
9.2.1 Electromagnetic interference . 24
9.2.2 Thunderstorms and voltage peaks . 24
9.2.3 Temperature and humidity . 24
9.2.4 Mechanical stress . 24
9.3 Flow sensors . 25
9.3.1 Flow profile . 25
9.4 Temperature sensors . 27
9.4.1 General . 27
9.4.2 Arranging temperature sensors . 29
9.5 Calculators . 30
10 Installing thermal energy meters . 31
10.1 General . 31
10.2 Mechanics . 31
10.3 Connecting to pipes . 31
10.4 Electrical connections . 31
10.5 Commissioning . 32
11 Monitoring operation . 32
11.1 General . 32
11.2 Measuring cooling supply using water or liquids other than water . 32
11.2.1 General . 32
11.2.2 Flow sensor requirements . 33
11.2.3 Requirements for temperature measurement . 33
11.2.4 Calculator requirements . 35
11.3 Requirements for the system arrangement of cooling measurements . 36
12 Other liquids than water . 38
12.1 Introduction . 38
12.2 Physical impact . 39
12.3 Flow measurement . 41
12.4 Temperature difference measurement . 47
12.5 Calculator .
...