CEN/TR 17689-1:2026

BAC Control loop components - Quality and performance assessment - Part 1: General framework and procedure

This Technical Report describes and makes transparent the standards set of the Components for BAC Control Loop used for electronic individual zone control equipment.
The CEN numbering shows the coverage of the subject and their relationship.

Komponenten von Gebäudeautomation-Regelkreisen - Bewertung von Qualität und Leistung - Teil 1: Allgemeiner Rahmen und Verfahren

Lles Composants d’une Boucle de Régulation- Évaluation de la qualité et performance - Partie 1: Document Cadre Général et procédures

Komponente krmilne zanke BAC - Ocena kakovosti in zmogljivosti - 1. del: Splošni okvir in postopek

Ta tehnično poročilo opisuje in pojasnjuje nabor standardov za komponente za BAC (Building Automation and Control - avtomatizacija in nadzor stavb) krmilno zanko, ki se uporabljajo za elektronsko opremo za individualno coniranje.

General Information

• Status: Published
• Publication Date: 02-Jun-2026
• ICS: 35.240.67 - IT applications in building and construction industry
• ICS: 97.120 - Automatic controls for household use
• Technical Committee: CEN/TC 247 - Controls for mechanical building services
• Drafting Committee: CEN/TC 247/WG 6 - Electronic control equipment for HVAC applications, integrated room automation, controls and management systems
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 03-Jun-2026
• Due Date: 16-Mar-2027
• Completion Date: 03-Jun-2026
• Ref Project: SIST-TP CEN/TR 17689-1:2026 - BAC Control loop components - Quality and performance assessment - Part 1: General framework and procedure

Overview

CEN/TR 17689-1:2026 - BAC Control Loop Components - Quality and Performance Assessment - Part 1: General Framework and Procedure sets out a transparent and harmonized approach to evaluating the quality and performance of components used in Building Automation and Control (BAC) systems. Developed by CEN Technical Committee CEN/TC 247, this technical report provides the foundational framework for BAC control loop component assessment, focusing on electronic individual zone control equipment. The document details the structure of related standards, defines assessment procedures, and supports the selection of suitable components to ensure optimal comfort and energy efficiency in modern buildings.

Key Topics

• General Framework for BAC Component Assessment

  • Describes the set of standards for BAC control loop components, including sensors, valves, and actuators.
  • Defines the relationship between various standards and their complementary roles in ensuring control quality and system performance.

• Scope of Application

  • Applies to electronic individual zone control equipment for building automation, supporting compliance with EU Directives on energy performance.
  • Emphasizes the importance of BAC systems in achieving energy efficiency, comfort, and cost savings in building management.

• Assessment Procedures

  • Outlines the methodology for quality and performance assessment for both sensors (EN 17690-1) and valve-actuator assemblies (EN 17691-1).
  • Establishes requirements for self-declaration by manufacturers for BAC component interchangeability and certification.

• BAC Control Loop Components

  • Explains the interaction of controllers, sensors, valves, and actuators in maintaining desired environmental conditions.
  • Details the importance of component selection and interoperability for precise control and efficient building operations.

Applications

BAC control loops and their assessed components are vital in a wide range of building services, including:

• Heating and Cooling Systems

  • Radiator heating, water floor heating, and ceiling systems.
  • Fan coil units (2-pipe/4-pipe), chilled beams, and electric heating solutions.

• HVAC Zone Control

  • Individual room temperature control for maximum occupant comfort and energy efficiency.
  • Variable air volume systems with or without heating/cooling coils.

• Energy Performance Compliance

  • Supports building owners, facility managers, and manufacturers in meeting the requirements of EU regulations and industry best practices.
  • Helps in achieving desired comfort levels, health, and productivity while optimizing energy consumption.

These applications extend to residential, commercial, and institutional buildings, enhancing both operational efficiency and sustainability.

Related Standards

CEN/TR 17689-1:2026 serves as the entry point in a coordinated set of standards for BAC control loops, including:

• EN 17690-1 – Components for BAC Control Loop - Sensors - Part 1: Room Temperature Sensors
• EN 17691-1 – Components for BAC Control Loops - Valve and Actuator Assemblies - Part 1: Water-Based HVAC Applications
• EN 15500-1 – Energy Performance of Buildings - Control for Heating, Ventilating, and Air Conditioning Applications
• EN ISO 52120-1 – Energy Performance of Buildings - Contribution of Building Automation, Controls, and Building Management
• EN ISO 7345, ISO 52000-1, EN 12098 series – Supporting framework and technical definitions

These standards are referenced within CEN/TR 17689-1, ensuring alignment with building automation best practices and regulatory requirements.

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Keywords: BAC control loop, building automation standards, performance assessment, CEN/TR 17689-1, quality assessment, electronic zone control, BAC components, HVAC controls, sensors, actuators, valves, building energy efficiency, EN 17690-1, EN 17691-1, European building standards.

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2026
Sestavni deli krmilne zanke BAC - Ocena kakovosti in delovanja - 1. del: Splošni
okvir in postopek
BAC Control loop components - Quality and performance assessment - Part 1: General
framework and procedure
Komponenten von Gebäudeautomation-Regelkreisen - Bewertung von Qualität und
Leistung - Teil 1: Allgemeiner Rahmen und Verfahren
Lles Composants d’une Boucle de Régulation- Évaluation de la qualité et performance -
Partie 1: Document Cadre Général et procédures
Ta slovenski standard je istoveten z: CEN/TR 17689-1:2026
ICS:
35.240.67 Uporabniške rešitve IT v IT applications in building
gradbeništvu and construction industry
97.120 Avtomatske krmilne naprave Automatic controls for
za dom household use
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN/TR 17689-1
TECHNICAL REPORT
RAPPORT TECHNIQUE
June 2026
TECHNISCHER REPORT
ICS 35.240.67; 97.120
English Version
BAC Control loop components - Quality and performance
assessment - Part 1: General framework and procedure
Lles Composants d'une Boucle de Régulation- Komponenten von Gebäudeautomation-Regelkreisen -
Évaluation de la qualité et performance - Partie 1: Bewertung von Qualität und Leistung - Teil 1:
Document Cadre Général et procédures Allgemeiner Rahmen und Verfahren

This Technical Report was approved by CEN on 17 May 2026. It has been drawn up by the Technical Committee CEN/TC 247.

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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 17689-1:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Abbreviations . 6
5 Numbering scheme . 6
6 Control loop . 6
7 Quality and performance assessment for the sensors . 7
8 Quality and performance assessment for the valves and actuators . 8
Bibliography . 9

European foreword
This document (CEN/TR 17689-1:2026) has been prepared by Technical Committee CEN/TC 247
“Building Automation, Controls and Building Management”, the secretariat of which is held by SNV.
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.
This document has been prepared with the involvement of the EU Industry BAC Association eu.bac and
supports essential requirements of EU Directive(s).
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
Introduction
Various EU-Directives and National Regulations regarding energy saving and energy performance of
buildings require proof of energy efficiency.
These requirements and rising energy costs are encouraging owners and occupiers of buildings to reduce
their energy consumption. The cost for energy will be a critical factor in property rental in the future.
The Building Automation and Control (BAC) standards (mainly EN ISO 52120-1, EN 15500-1 and their
respective accompanying Technical Reports CEN ISO/TR 52120-2 and CEN/TR 15500-2) show the
importance of BAC quality in order achieving via control accuracy, BAC functions and BAC strategies
desired comfort (e.g., human health and productivity) while maintaining maximum efficiency. In
response to these concerns, eu.bac (the European Building Automation and Controls Association) set up
the European Certification Scheme for Building Automation. Within this certification scheme, an
“interchangeability” concept and rules were developed. It is based on European Standard EN 15500-1
and its accompanying Technical Report CEN/TR 15500-2.
Since more and more components become available, each component of a BAC control loop ideally will
be described in a set of standards. In addition, this document aims to ease the appropriate selection of
components in order getting the desired control loop quality and the desired performance. It also shows
the relationship between the set of standards and quality and performance criteria.
The set of standards covers sensors, valves and actuators used in a building automation and controls in
conjunction with a BAC controller. These components contribute to the control accuracy of a control loop.
Classifications and test methodologies for these components are described in each standard. Based on
the set of standards, a self-declaration of the manufacturer can be taken into consideration for the
Interchangeability.
Table 1 shows the list of applications covered by the eu.bac certification scheme, depending on the
building services and energy carriers.
Table 1 — List of applications covered by the eu.bac certification scheme
Application Building service(s) Energy carrier(s)
Heating system (radiator heating) Heating Water
Electronic radiator valve Heating Water
Water floor heating Heating Water
Ceiling system Heating and Cooling Water
Fan coil unit system 2 pipes / 4 pipes Heating and Cooling Air - Water
Fan coil unit system 2 pipes/ 2 wires Heating and Cooling Air – Water - Electricity
Variable air volume system without Heating and Cooling Air
heating/cooling coil
Variable air volume system with Heating and Cooling Air - Water
heating/cooling coil
Electric convector Heating Electricity
Electric floor heating Heating Electricity
Electric ceiling heating Heating Electricity
Chilled beam (2 pipes or 4 pipes) Heating and cooling Air - Water
1 Scope
This document describes and makes transparent the set of standards on the Components for BAC Control
Loop used for electronic individual zone control equipment.
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.
EN ISO 7345, Thermal performance of buildings and building components - Physical quantities and
definitions (ISO 7345:2018)
ISO 52000-1, Energy performance of buildings — Overarching EPB assessment — Part 1: General
framework and procedures
EN 15500-1, Energy Performance of Buildings - Control for heating, ventilating and air conditioning
applications - Part 1: Electronic individual zone control equipment - Modules M3-5, M4-5, M5-5
CEN/TR 15500-2, Energy Performance of Buildings - Control for heating, ventilating and air-conditioning
applications — Part 2:
...