SIST EN ISO 11855-5:2021/A1:2024

Building environment design - Embedded radiant heating and cooling systems - Part 5: Installation - Amendment 1 (ISO 11855-5:2021/Amd 1:2023)

Umweltgerechte Gebäudeplanung - Flächenintegrierte Strahlungsheiz- und -kühlsysteme - Teil 5: Installation (ISO 11855-5:2021/Amd 1:2023)

Conception de l'environnement des bâtiments - Systèmes intégrés de chauffage et de refroidissement par rayonnement - Partie 5: Installation - Amendement 1 (ISO 11855-5:2021/Amd 1:2023)

Načrtovanje notranjega okolja v stavbah - Vgrajeni sevalni ogrevalni in hladilni sistemi - 5. del: Vgradnja - Dopolnilo A1 (ISO 11855-5:2021/Amd 1:2023)

General Information

• Status: Published
• Public Enquiry End Date: 31-Mar-2023
• Publication Date: 16-Nov-2023
• ICS: 91.140.10 - Central heating systems
• ICS: 91.140.30 - Ventilation and air-conditioning systems
• Technical Committee: OGS - Heating for buildings
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 10-Nov-2023
• Due Date: 15-Jan-2024
• Completion Date: 17-Nov-2023
• Ref Project: EN ISO 11855-5:2021/A1:2023 - Building environment design - Embedded radiant heating and cooling systems - Part 5: Installation - Amendment 1 (ISO 11855-5:2021/Amd 1:2023)

Relations

• Amends: SIST EN ISO 11855-5:2021 - Building environment design - Embedded radiant heating and cooling systems - Part 5: Installation (ISO 11855-5:2021)
• Effective Date: 01-Jan-2024

Overview

EN ISO 11855-5:2021/A1:2023 is the CEN-endorsed amendment to Part 5 of ISO 11855, which covers installation requirements for embedded radiant heating and cooling systems (floor, wall and ceiling-integrated systems). This amendment (A1) updates installation illustrations, joint typologies and a table entry related to thermal insulation geometry. It was approved by CEN in May 2023 and adopted as a national standard across CEN members.

Key topics and technical requirements

• System layers and components - the amendment clarifies the position and naming of construction layers used in embedded radiant systems:
  • Thermal insulation layer
  • Protection layer
  • Thermal diffusion layer
  • Surface layer
  • Structural layer
  • Pipes or electric cables
• Joints - definitions and placement
  • Construction joints: structural joints through the full element thickness (wall, floor, ceiling), including reinforcement.
  • Expansion (movement) joints: cross the full screed thickness to accommodate dimensional changes mainly due to temperature.
  • Contraction joints: guided break lines that interrupt part of the screed thickness; the cut depth shall not exceed 1/3 of the uniform screed layer.
  • For heating screeds of type I, movement and perimeter joints may be crossed only by connecting pipes at a single level; these connecting pipes must be covered with a flexible insulation tube approximately 0.3 m long.
• Insulation geometry update
  • Amendment A1 modifies a Table 1 entry specifying the thickness of thermal insulation in type II systems measured from the outward edge of the insulation to the inward edge of the pipes (see referenced figure).
• Illustration updates
  • Figure 1 keys and joint typologies were revised to align installation guidance with the updated terminology and dimensional rules.

Practical applications and users

This amendment is relevant for professionals involved in designing, specifying and installing embedded radiant systems:

• HVAC and building services engineers
• Architects and façade/structure designers
• Mechanical contractors and installers
• Flooring and screed subcontractors
• Manufacturers of radiant heating/cooling components
• Standards bodies and compliance officers

Practical uses include setting pipe routing and depth, specifying insulation thickness and joint detailing to prevent thermal stress, and ensuring correct layering for effective heat diffusion and long-term durability.

Related standards

• ISO 11855 series (Parts 1–6) - overarching design, performance and testing guidance for embedded radiant heating and cooling systems.
• National and regional building and HVAC codes referenced by EN/CEN members.

Keywords: EN ISO 11855-5:2021/A1:2023, embedded radiant heating and cooling, installation requirements, radiant floor heating, thermal insulation, expansion joints, contraction joints, heating screed.

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2024
Načrtovanje notranjega okolja v stavbah - Vgrajeni sevalni ogrevalni in hladilni
sistemi - 5. del: Vgradnja - Dopolnilo A1 (ISO 11855-5:2021/Amd 1:2023)
Building environment design - Embedded radiant heating and cooling systems - Part 5:
Installation - Amendment 1 (ISO 11855-5:2021/Amd 1:2023)
Umweltgerechte Gebäudeplanung - Flächenintegrierte Strahlungsheiz- und -
kühlsysteme - Teil 5: Installation (ISO 11855-5:2021/Amd 1:2023)
Conception de l'environnement des bâtiments - Systèmes intégrés de chauffage et de
refroidissement par rayonnement - Partie 5: Installation - Amendement 1 (ISO 11855-
5:2021/Amd 1:2023)
Ta slovenski standard je istoveten z: EN ISO 11855-5:2021/A1:2023
ICS:
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
91.140.30 Prezračevalni in klimatski Ventilation and air-
sistemi conditioning systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 11855-5:2021/A1
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2023
EUROPÄISCHE NORM
ICS 91.040.01
English Version
Building environment design - Embedded radiant heating
and cooling systems - Part 5: Installation - Amendment 1
(ISO 11855-5:2021/Amd 1:2023)
Conception de l'environnement des bâtiments - Umweltgerechte Gebäudeplanung - Flächenintegrierte
Systèmes intégrés de chauffage et de refroidissement Strahlungsheiz- und -kühlsysteme - Teil 5: Installation
par rayonnement - Partie 5: Installation - Amendement - Änderung 1 (ISO 11855-5:2021/Amd 1:2023)
1 (ISO 11855-5:2021/Amd 1:2023)
This amendment A1 modifies the European Standard EN ISO 11855-5:2021; it was approved by CEN on 14 May 2023.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of
this amendment into the relevant 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 amendment 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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11855-5:2021/A1:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 11855-5:2021/A1:2023) has been prepared by Technical Committee ISO/TC
205 "Building environment design" in collaboration with Technical Committee CEN/TC 228 “Heating
systems and water based cooling systems in buildings” the secretariat of which is held by DIN.
This Amendment to the European Standard EN ISO 11855-5:2021 shall be given the status of a national
standard, either by publication of an identical text or by endorsement, at the latest by May 2024, and
conflicting national standards shall be withdrawn at the latest by May 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/national committee. A complete listing of these bodies can be found on the CEN website.
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, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 11855-5:2021/Amd 1:2023 has been approved by CEN as EN ISO 11855-
5:2021/A1:2023 without any modification.

INTERNATIONAL ISO
STANDARD 11855-5
Second edition
2021-08
AMENDMENT 1
2023-10
Building environment design —
Embedded radiant heating and cooling
systems —
Part 5:
Instal
...