SIST-TP CEN/TR 17689-1:2026

• Abstract:

  This Technical Report describes and makes transparent the standards set of the Components for BAC Control Loop used for electronic individual zone control equipment.

• Status: Published
• Publication Date: 15-Jun-2026
• ICS: 35.240.67 - IT applications in building and construction industry
• ICS: 97.120 - Automatic controls for household use
• Technical Committee: OGS - Heating for buildings
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 10-Jun-2026
• Due Date: 15-Aug-2026
• Completion Date: 16-Jun-2026
• Ref Project: CEN/TR 17689-1:2026 - BAC Control loop components - Quality and performance assessment - Part 1: General framework and procedure

SIST-TP CEN/TR 17689-1:2026 is a CEN Technical Report on Building Automation and Control (BAC) control loop components. It sets out the general framework and procedure for quality and performance assessment of components used in electronic individual zone control equipment. It is written for people selecting, testing, or declaring BAC sensors, valves, and actuators, and it shows how the related component standards fit together.

What does SIST-TP CEN/TR 17689-1:2026 specify?

SIST-TP CEN/TR 17689-1:2026 describes the set of standards for BAC control loop components used in electronic individual zone control equipment. Its main purpose is to make the subject coverage and the relationship between the component standards transparent.

The document is organized into clauses on scope, normative references, terms and definitions, abbreviations, numbering scheme, control loop, and the quality and performance assessment for sensors and for valves and actuators. It also includes a bibliography for related work.

In practice, this means the Technical Report is a map for the BAC component standards rather than a standalone product standard. It helps readers understand which part applies to which component and how the parts work together in a control loop.

What are the key requirements of SIST-TP CEN/TR 17689-1:2026?

SIST-TP CEN/TR 17689-1:2026 explains the BAC control loop structure, the numbering scheme for the component standards, and how sensor and actuator standards support interchangeability and performance assessment.

The control loop concept

Clause 6 describes a control loop as a controller working with loop components such as a room temperature sensor, a valve, and an actuator. The controller may be used with different components if the interfaces fit and the basic characteristics of the replaced elements remain the same. In practice, this tells a buyer or integrator when a substitution is technically acceptable.

Sensors and room temperature control

Clause 7 points to EN 17690-1 for quality parameters, requirements, and test methods for room temperature sensors used in individual zone control. EN 17690-1 covers wall-mounted and flush-mounted sensors and focuses on the room temperature sensing function only. This matters because installation position and local effects such as air velocity, wall temperature, and self-heating can change the measured value.

Sensor scope and exclusions

Clause 7 also identifies sensor types outside the scope of EN 17690-1, including pendulum temperature sensors, ceiling-mounted temperature sensors, extract air temperature sensors, and infrared temperature sensors. If a device combines several sensors, only the room temperature sensing function is addressed unless another sensor affects that measurement. For readers, this means the standard is aimed at the part of the device that controls room temperature, not every sensing function in the housing.

Valves and actuators

Clause 8 points to EN 17691-1 for valve and actuator assemblies used in individual zone control of water-based HVAC applications. It specifies requirements and test methods for self-declaration of these assemblies. In practice, this supports comparing replacement assemblies and checking whether an alternative product is equivalent or better for the same control loop.

Link to control accuracy and interchangeability

The introduction and clauses 7 to 8 connect component performance to the control accuracy of the overall BAC system and to interchangeability in the eu.bac certification context. The document says the standards set supports selection of components to achieve the desired control loop quality and performance. For users, this is the bridge between component data and the performance expected in the building.

What terms does SIST-TP CEN/TR 17689-1:2026 define?

• BAC - Building Automation and Control, the field covered by the document.
• DDC - Direct Digital Control, the technology used for the BAC control loop.
• HVAC - Heating, Ventilation and Cooling, the application area where the components operate.
• Control loop - A controller with feedback from components such as sensors, valves, and actuators to maintain a process variable at a set point.
• Interchangeability - The ability to replace one assessed component with another while keeping compatible interfaces and comparable performance.
• Self-declaration - A manufacturer’s declaration based on the requirements and test methods in the relevant component standard.
• Control accuracy - The degree to which the control loop achieves the intended room temperature or other set point.

Who uses SIST-TP CEN/TR 17689-1:2026?

SIST-TP CEN/TR 17689-1:2026 is used by manufacturers of BAC sensors, valve and actuator assemblies, and control equipment. It also supports test and certification work, especially where self-declaration and interchangeability are considered.

The document is relevant to building automation and controls professionals, HVAC engineers, and people selecting components for electronic individual zone control equipment. It also speaks to organizations involved in the eu.bac certification scheme and to readers who need to understand how BAC component standards relate to energy performance and building control.

Which standards are used with SIST-TP CEN/TR 17689-1:2026?

SIST-TP CEN/TR 17689-1:2026 relies on several related standards and framework documents:

• EN ISO 7345 - provides thermal-performance quantities and definitions.
• ISO 52000-1 - gives the overarching energy performance of buildings framework and procedures.
• EN 15500-1 - covers electronic individual zone control equipment and links BAC quality to performance.
• CEN/TR 15500-2 - supports EN 15500-1 with accompanying technical explanation.
• EN 12098-1 - covers control equipment for hot water heating systems.
• EN 12098-3 - covers control equipment for electrical heating systems.
• EN 17690-1 - covers room temperature sensors for individual zone control.
• EN 17691-1 - covers valve and actuator assemblies for water-based HVAC applications.
• EN ISO 52120-1 and CEN ISO/TR 52120-2 - are cited in the introduction as the main BAC energy-performance framework and its explanation.

What does the SIST-TP CEN/TR 17689-1:2026 document contain?

SIST-TP CEN/TR 17689-1:2026 contains a numbering scheme, a simple control-loop diagram, and the framework for assessing sensors and valve-actuator assemblies. It also includes a table of application types used in the eu.bac certification scheme and a table of abbreviations.

The document uses a table to show which sensor types are not covered, which helps readers avoid applying the room-temperature-sensor standard to the wrong product type. Its bibliography points to the broader BAC and energy-performance standards family.

In short, the document is a guide to how the BAC component standards are structured and how their assessment results support component selection, testing, and interchangeability in HVAC control loops.

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:
...