ISO 18566-6:2019

INTERNATIONAL ISO
STANDARD 18566-6
First edition
2019-08
Building environment design —
Design, test methods and control of
hydronic radiant heating and cooling
panel systems —
Part 6:
Input parameters for the energy
calculation
Reference number
©
ISO 2019
© ISO 2019
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ii © ISO 2019 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and subscripts . 1
4.1 Symbols . 1
4.2 Subscripts . 2
5 Basic formula . 2
6 Determination of input parameters for the energy efficiency of heating and cooling
emission products . 3
6.1 Heating and cooling systems with more than one covering layer above the pipes
(Type 1) . 3
6.2 Ceiling mounted water-based radiator system (Type 2) . 4
Annex A (informative) Calculation example (Type 1) . 5
Bibliography . 6
Foreword
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This document was prepared by Technical Committee ISO/TC 205, Building environment design.
A list of all parts in the ISO 18566 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
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iv © ISO 2019 – All rights reserved

Introduction
The radiant heating and cooling system consists of heat emitting/absorbing, heat supply, distribution
and control systems. Typical applications are low temperature radiant heating and high temperature
radiant cooling. They are classified as embedded radiant heating and cooling systems and prefabricated
radiant heating and cooling panel systems.
While the ISO 11855 series is for embedded radiant heating and cooling systems without an open-
air gap, the ISO 18566 series is for radiant heating and cooling panel systems with an open air gap.
Because the system specifications for ISO 18566 are different from those of ISO 11855, it was necessary
to develop separate ISO standards regarding the design and test methods of the cooling and heating
capacity and control.
ISO 18566-1 specifies the comfort criteria, technical specifications and requirements which should be
considered in the manufacturing and installation of radiant heating and cooling systems. ISO 18566-2
provides the test facility and test method for heating and cooling capacity of ceiling mounted radiant
panels. ISO 18566-3 specifies the design considerations and design processes of ceiling mounted radiant
panels. ISO 18566-4 addresses the control of ceiling mounted radiant heating and cooling panels to
ensure the maximum performance which was intended in the design stage when the system is actually
being operated in a building. This document presents a determination method of input parameters for
1)
the energy efficiency of heating and cooling products in relation to ISO 52031.
ISO 18566 does not cover the panels that are embedded into the ceiling, wall or floor structure. This
document is partly based on EN 14240, EN 14037 and ASNI/ASHRAE Standard 138.
1) Under preparation. Stage at the time of publication: ISO/DIS 52031:—.
INTERNATIONAL STANDARD ISO 18566-6:2019(E)
Building environment design — Design, test methods and
control of hydronic radiant heating and cooling panel
systems —
Part 6:
Input parameters for the energy calculation
1 Scope
This document establishes guidelines for the determination of input parameters for ceiling mounted
radiant heating and cooling panels in relation to ISO 52031. The requirements specified by this
document are applicable only to the components of the heating/cooling systems and the elements
which are part of the heating/cooling panels and which are installed to provide heating and/or cooling.
This document is applicable to water-based ceiling mounted radiant heating and cooling panels in
residential, commercial and industrial buildings. The methods apply to systems mounted under the
ceiling with an open air gap between the panels and the ceiling.
This document also applies, as appropriate, to the use of fluids other than water as a heating or cooling
medium. This document is also applicable for testing of systems. The methods do not apply to heated or
chilled ceiling beams.
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 amendme
...