CEN/TR 16798-4:2017

SLOVENSKI STANDARD
01-julij-2018
(QHUJLMVNHODVWQRVWLVWDYE3UH]UDþHYDQMHVWDYEGHO5D]ODJDLQXWHPHOMLWHY(1
3UH]UDþHYDQMHQHVWDQRYDQMVNLKVWDYE=DKWHYDQHODVWQRVWL]DVLVWHPH
SUH]UDþHYDQMDLQNOLPDWL]DFLMHSURVWRURY0RGXOD00
Energy performance of buildings - Ventilation for buildings - Part 4: Interpretation of the
requirements in EN 16798- 3 - For non-residential buildings - Performance requirements
for ventilation and room-conditioning systems (Modules M5-1, M5-4)
Energieeffizienz von Gebäuden - Teil 4: Lüftung von Nichtwohngebäuden -
Anforderungen an die Leistung von Lüftungs- und Klimaanlagen und Raumkühlsystemen
- Technischer Bericht - Interpretation der Anforderungen der EN 16798-3 (Module M5-1,
M5-4)
Performance énergétique des bâtiments - Ventilation des bâtiments - Partie 4 :
Interprétation des exigences de l’EN 16798-3 - Pour les bâtiments non résidentiels -
Exigences de performances pour les systèmes de ventilation et de conditionnement d'air
(Modules M5-1, M5-4)
Ta slovenski standard je istoveten z: CEN/TR 16798-4:2017
ICS:
91.140.30 3UH]UDþHYDOQLLQNOLPDWVNL Ventilation and air-
VLVWHPL conditioning systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN/TR 16798-4
TECHNICAL REPORT
RAPPORT TECHNIQUE
June 2017
TECHNISCHER BERICHT
ICS 91.120.10; 91.140.30
English Version
Energy performance of buildings - Ventilation for buildings
- Part 4: Interpretation of the requirements in EN 16798-
3 - For non-residential buildings - Performance
requirements for ventilation and room-conditioning
systems(Modules M5-1, M5-4)
Performance énergétique des bâtiments - Partie 4 : Energieeffizienz von Gebäuden - Teil 4: Lüftung von
Ventilation dans les bâtiments non résidentiels - Nichtwohngebäuden - Anforderungen an die Leistung
Exigences de performances pour les systèmes de von Lüftungs- und Klimaanlagen und
ventilation et de conditionnement d'air - Rapport Raumkühlsystemen - Technischer Bericht -
technique - Interprétation des exigences de l'EN Interpretation der Anforderungen der EN 16798-3
16798-3
This Technical Report was approved by CEN on 3 April 2017. It has been drawn up by the Technical Committee CEN/TC 156.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 16798-4:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 6
Introduction . 8
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 11
4 Symbols and subscripts . 11
4.1 Symbols . 11
4.2 Subscripts . 11
5 Brief description of the method and routing . 11
5.1 Output of the method . 11
5.2 General description of the method . 11
6 Calculation method . 11
7 Indoor Environment . 11
7.1 General . 11
7.2 Occupied zone . 11
8 Agreement of design criteria . 11
8.1 General . 11
8.2 Principles . 11
8.3 General building characteristics . 12
8.3.1 Location, outdoor conditions, neighbourhood . 12
8.3.2 Design weather data . 12
8.3.3 Information on the operation of the building . 12
8.4 Construction data . 12
8.5 Geometrical description . 12
8.6 Use of the rooms . 12
8.6.1 General . 12
8.6.2 Human occupancy . 12
8.6.3 Internal heat gains . 12
8.6.4 Internal pollution and moisture sources . 12
8.6.5 Given extract airflow . 12
8.7 Requirements in the rooms . 12
8.7.1 General . 12
8.7.2 Type of control . 12
8.7.3 Thermal comfort . 12
8.7.4 Air quality for people . 13
8.7.5 Noise level . 13
8.7.6 Lighting . 13
8.8 System recommendations . 13
8.8.1 General . 13
8.8.2 Location of intake openings . 13
8.8.3 Location of exhaust openings . 14
8.8.4 Distance between intake and exhaust openings . 14
8.8.5 Space recommendations for components and systems . 19
8.9 Heat transmission of surfaces of ventilation systems . 22
8.9.1 Thermal insulation of the system . 22
8.9.2 General . 23
8.9.3 Heat transmission of duct between thermal building envelope and heat recovery . 23
8.9.4 Heat transmission of the Air Handling unit (AHU) casing . 23
8.9.5 Heat transmission at air ducts . 23
8.9.6 Air heating or cooling systems . 24
8.10 General recommendations for control and monitoring . 24
8.11 General recommendations for maintenance and safety of operation . 24
8.11.1 Hygienic and technical aspects to installation and maintenance . 24
8.11.2 Hygienic and technical aspects to installation and maintenance . 24
8.11.3 Ductwork . 25
8.12 Process from project initiation to operation . 25
8.13 Supply air humidity . 26
9 Classification . 26
9.1 Specification of types of air . 26
9.2 Classification of air . 26
9.2.1 Extract air and exhaust air . 26
9.2.2 Outdoor Air . 27
9.2.3 Supply Air . 31
9.2.4 Indoor Air . 31
9.2.5 Extract air and exhaust air . 31
9.3 System functions and basic system types . 33
9.3.1 General . 33
9.3.2 Types and configurations . 33
9.3.3 Controls and operation . 33
9.4 Design flow balance . 34
9.4.1 General . 34
9.4.2 Building . 34
9.4.3 Indoors . 35
9.4.4 System . 35
9.4.5 Pressure conditions in units and systems . 35
9.4.6 Ductwork . 35
9.5 Specific fan power . 36
9.5.1 General . 36
9.5.2 Classification of specific fan power . 37
9.5.3 Calculating the power demand of the fan . 37
9.5.4 Specific Fan Power of an entire building . 37
9.5.5 Specific Fan Power under reference and design load conditions . 37
9.5.6 Specifying the SFP of Individual Air Handling Units . 37
E
9.5.7 AHU related SFP values. 37
9.6 Heat recovery . 37
9.6.1 General . 37
9.6.2 Requirements for heat recovery . 37
9.6.3 Transfer of humidity . 37
9.6.4 Icing and defrosting . 38
9.6.5 Transfer of pollutants . 38
9.6.6 Classification of air correction factor in heat recovery . 39
9.7 Filtration . 40
9.7.1 General . 40
9.7.2 Air filters maintenance . 41
9.8 Leakages in ventilation systems. 42
9.8.1 General . 42
9.8.2 Leakages in heat recovery . 43
9.8.3 Classification . 43
9.8.4 Leakage in air handling unit (AHU) casing . 44
9.8.5 Filter by-pass leakage . 44
9.8.6 Leakage in air distribution systems . 44
9.8.7 Airtightness of the building . 44
10 Calculation and energy rating . 44
10.1 Ventilation effectiveness and air distribution . 44
10.1.1 General . 44
10.1.2 Calcualtion of ventilation air volume flow . 44
10.2 Calculation of air volume flows . 45
10.2.1 Supply Air . 45
10.2.2 Extract airflow rates . 45
10.2.3 Ventilation rates for rooms not designed for human occupancy . 45
10.3 Energy rating of ventilation systems . 46
11 Quality control . 46
12 Compliance check. 46
13 Worked out examples, method 1 . 47
13.1 Example 1 . 47
13.1.1 Description . 47
13.1.2 Calculation details . 47
13.1.3 Observations . 47
13.2 Example 2 . 47
14 Worked out examples, method 2 . 47
15 Validation of the calculation procedures . 47
Annex A (informative) Input and method selection data sheet — Template . 48
A.1 General . 48
A.2 References . 48
Annex B (informative) Input and method selection data sheet — Default choices . 49
B.1 General . 49
B.2 References . 49
Annex C (informative) Basic Ventilation Aspects — Characteristic of possible ventilation
systems . 50
Annex D (informative) Natural and Hybrid Ventilation . 52
D.1 General . 52
D.2 Introduction to natural ventilation . 52
D.2.1 General . 52
D.2.2 Buoyancy ventilation . 52
D.2.3 Cross ventilation . 52
D.2.4 Single-sided natural ventilation . 52
D.2.5 Combinations . 52
D.2.6 Cooling by means of natural ventilation . 53
D.2.7 Energy neutral ventilation . 53
D.3 Introduction to hybrid ventilation . 53
D.3.1 General . 53
D.3.2 Fan supported natural ventilation . 53
D.3.3 Natural and mechanical ventilation . 53
D.3.4 Mechanical ventilation supported by natural ventilation . 54
D.3.5 Mechanical ventilation incorporating cooling by means of natural ventilation . 54
D.4 Introduction to the design of natural and hybrid ventilation . 54
D.4.1 System design . 54
D.4.2 System components . 55
D.4.3 Maintenance and operation control . 57
D.4.4 Balancing and handing over . 58
Annex E (informative) Checklist for the design and use of systems with low energy
consumption . 59
E.1 Checklist for the planning of the building. 59
E.2 Checklist for the planning of the HVAC-system . 59
E.3 Checklist for the designing of individual components . 60
E.4 Checklist for the use of the system . 60
Annex F (informative) Efficiency of ventilation and air diffusion . 62
Annex G (informative) Impact of Leakage — Examples — Impact of leakage subject to the
arrangement of components . 63
Annex H (informative) Features of Heat Recovery Systems . 66
H.1 Heat recovery systems . 66
H.2 Common features of HRS . 67
Annex I (informative) Impact of thermal transmission of ducts — Heat transmission of duct
between thermal building envelope and heat recovery . 68
I.1 General . 68
I.2 Adapted heat recovery ratio to connection ducts . 68
Bibliography . 70

European foreword
This document (CEN/TR 16798-4:2017) has been prepared by Technical Committee CEN/TC 156
“Ventilation for buildings”, the secretariat of which is held by BSI.
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 under a mandate given to CEN by the European Commission and the
European Free Trade Association.
This TR has been produced to meet the requirements of Directive 2010/31/EU 19 May 2010 on the
energy performance of buildings (recast), referred to as “recast EPDB”.
This document goes together with EN 16798-3:2017 which supersedes EN 13779:2007. The latter
document was produced to meet the requirements of Directive 2002/91/EC of 16 December 2002 on
energy performance of buildings referred to as “EPBD”. This document gives additional guidance to
EN 16798-3:2017.
For the convenience of Standards users, CEN/TC 156, together with responsible Working Group
Convenors, have prepared a simple table below relating, where appropriate, the relationship between
the ‘EPBD’ and ‘recast EPBD’ standard numbers prepared by Technical Committee CEN/TC 156
“Ventilation for buildings”.
EPBD Recast EPBD
Title
EN Number EN Number
Energy performance of buildings – Ventilation for buildings - Part 1:
Indoor environmental input parameters for design and assessment
EN 15251 EN 16798–1
of energy performance of buildings addressing indoor air quality,
thermal environment, lighting and acoustics (Module M1-6)
Energy performance of buildings – Ventilation for buildings - Part 2:
Interpretation of the requirements in EN 16798-1 - Indoor
N/A CEN/TR 16798–2 environmental input parameters for design and assessment of
energy performance of buildings addressing indoor air quality,
thermal environment, lighting and acoustics (Module M1-6)
Energy performance of buildings – Ventilation for buildings - Part 3:
EN 13779 EN 16798–3 For non-residential buildings – Performance requirements for
ventilation and room-conditioning systems (Modules M5-1, M5-4)
Energy performance of buildings – Ventilation for buildings - Part 4:
Interpretation of the requirements in EN 16798- 3 - For non-
N/A CEN/TR 16798–4
residential buildings – Performance requirements for ventilation
and room-conditioning systems(Modules M5-1, M5-4)
Energy performance of buildings — Ventilation for buildings – Part
5-1: Calculation methods for energy requirements of ventilation and
EN 15241 EN 16798–5–1
air conditioning systems (Modules M5-6, M5-8, M6-5, M6-8, M7-5,
M7-8) — Method 1: Distribution and generation
Energy performance of buildings – Ventilation for buildings - Part 5-
2: Calculation methods for energy requirements of ventilation
EN 15241 EN 16798–5–2
systems (Modules M5-6, M5-8, M6-5, M6-8, M7-5, M7-8) - Method 2:
Distribution and generation
Energy performance of buildings - Ventilation for buildings – Part 6:
Interpretation of the requirements in EN 16798-5 -1 and EN 16798-
N/A CEN/TR 16798–6 5-2 – Calculation methods for energy requirements of ventilation
and air conditioning systems (Modules M5-6, M5-8, M 6-5, M6-8 ,
M7-5, M7-8)
Energy performance of buildings - Ventilation for buildings - Part 7:
EN 15242 EN 16798–7 Calculation methods for the determination of air flow rates in
buildings including infiltration (Modules M5-5)
Energy performance of buildings – Ventilation for buildings – Part 8:
Interpretation of the requirements in EN 16798-7 – Calculation
N/A CEN/TR 16798–8
methods for the determination of air flow rates in buildings
including infiltration – (Modules M5-5)
Energy performance of buildings – Ventilation for buildings - Part 9:
EN 15243 EN 16798–9 Calculation methods for energy requirements of cooling systems
(Modules M4-1, M4-4, M4-9) - General
Energy performance of buildings – Ventilation for buildings – Part
10: Interpretation of the requirements in EN 16798-9 – Calculation
N/A CEN/TR 16798–10
methods for energy requirements of cooling systems (Module M4-
1,M4-4, M4-9) – General
Energy performance of buildings – Ventilation for buildings - Part
N/A EN 16798–13
13: - Calculation of cooling systems (Module M4-8) – Generation
Energy performance of buildings – Ventilation for buildings - Part
N/A CEN/TR 16798–14 14: Interpretation of the requirements in EN 16798-13 – Calculation
of cooling systems (Module M4-8) – Generation
Energy performance of buildings – Ventilation for buildings – Part
N/A EN 16798–15
15: Calculation of cooling systems (Module M4-7) – Storage
Energy performance of buildings – Ventilation for buildings – Part
N/A CEN/TR 16798–16 16: Interpretation of the requirements in EN 16798-15 – Calculation
of cooling systems (Module M4-8 ) – Storage
EN 15239 Energy performance of buildings – Ventilation for buildings - Part
and EN 16798–17 17: Guidelines for inspection of ventilation and air- conditioning
EN 15240 systems (Module M4-11, M5-11, M6-11, M7-11)
Energy performance of buildings – Ventilation for buildings – Part
18: Interpretation of the requirements in EN 16798-17 – Guidelines
N/A CEN/TR 16798–18
for inspection of ventilation and air-conditioning systems (Module
M4-11, M5-11, M6-11, M7-11)
Introduction
The set of EPB standards, technical reports and supporting tools
In order to facilitate the necessary overall consistency and coherence, in terminology, approach,
input/output relations and formats, for the whole set of EPB-standards, the following documents and
tools are available:
a) a document with basic principles to be followed in drafting EPB-standards:
CEN/TS 16628, Energy Performance of Buildings — Basic Principles for the set of EPB standards [1];
b) a document with detailed technical rules to be followed in drafting EPB-standards:
CEN/TS 16629, Energy Performance of Buildings — Detailed Technical Rules for the set of EPB-
standards [2];
c) the detailed technical rules are the basis for the following tools:
1) a common template for each EPB standard, including specific drafting instructions for the
relevant Clauses;
2) a common template for each technical report that accompanies an EPB standard or a cluster of
EPB standards, including specific drafting instructions for the relevant Clauses;
3) a common template for the spreadsheet that accompanies each EPB standard, to demonstrate
the correctness of the EPB calculation procedures.
Each EPB standard follows the basic principles and the detailed technical rules and relates to the
overarching EPB-standard, EN ISO 52000-1 [3].
One of the main purposes of the revision of the EPB-standards is to enable that laws and regulations
directly refer to the EPB-standards and make compliance with them compulsory. This requires that the
set of EPB-standards consists of a systematic, clear, comprehensive and unambiguous set of energy
performance procedures. The number of options provided is kept as low as possible, taking into
account national and regional differences in climate, culture and building tradition, policy and legal
frameworks (subsidiarity principle). For each option, an informative default option is provided
(Annex B).
Rationale behind the EPB technical reports
There is a risk that the purpose and limitations of the EPB standards will be misunderstood, unless the
background and context to their contents – and the thinking behind them – is explained in some detail
to readers of the standards. Consequently, various types of informative contents are recorded and made
available for users to properly understand, apply and nationally or regionally implement the EPB
standards.
If this explanation would have been attempted in the standards themselves, the result is likely to be
confusing and cumbersome, especially if the standards are implemented or referenced in national or
regional building codes.
Therefore each EPB standard is accompanied by an informative technical report, like this one, where all
informative content is collected, to ensure a clear separation between normative and informative
contents (see CEN/TS 16629 [2]):
— to avoid flooding and confusing the actual normative part with informative content,
— to reduce the page count of the actual standard, and
— to facilitate understanding of the set of EPB standards.
This was also one of the main recommendations from the European CENSE project [5] that laid the
foundation for the preparation of the set of EPB standards.
This Technical Report
This Technical Report accompanies the EPB standard on performance requirements for ventilation and
room-conditioning systems. It relates to EN 16798-3, which forms part of a set of standards related to
the evaluation of the energy performance of buildings (EPB).
The role and the positioning of the accompanied standard in the set of EPB standards is defined in the
Introduction to the standard.
This technical report provides guidance to EN 16798-3 especially for designers, installers,
manufacturers, building owners and users, on ventilation, air-conditioning and room-conditioning
systems in order to achieve a comfortable and healthy indoor environment in all seasons with
acceptable installation and running costs. The standard focuses on the system-aspects for typical
applications and covers the following:
— aspects important to achieve and maintain a good energy performance in the systems without any
negative impact on the quality of the internal environment;
— relevant parameters of the indoor environment;
— definitions of design and performances data.
Relationships between this standard and related standards are introduced in EN 16798-3.
1 Scope
This Technical Report refers to EN 16798-3.
It contains information to support the correct understanding and use of EN 16798-3.
This Technical Report does not contain any normative provision.
This Technical Report applies to the design and implementation of ventilation, air conditioning and
room conditioning systems for non-residential buildings subject to human occupancy, excluding
applications like industrial processes. It focuses on the definitions of the various parameters, which are
relevant for such systems.
The guidance for design given in this standard and its annexes are mainly applicable to mechanical
supply and exhaust ventilation systems, and the mechanical part of hybrid ventilation systems.
Furthermore general design principles of natural ventilation systems are introduced in Annex D.
Applications for residential ventilation are not dealt with in this technical report. Performance of
ventilation systems in residential buildings are dealt with in CEN/TR 14788.
The classification uses different categories. For some values, examples are given and, for requirements,
typical ranges with default values are presented. The default values given in this standard are not
normative as such, and should be used where no other values are specified. Classification should always
be appropriate to the type of building and its intended use, and the basis of the classification should be
explained if the examples given in the standard are not to be used.
NOTE Different standards might express the categories for the same parameters in a different way, and the
category symbols may be different.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE More information on the use of EPB module numbers for normative references between EPB standards
is given in CEN ISO/TR 52000-2.
EN 308, Heat exchangers - Test procedures for establishing performance of air to air and flue gases heat
recovery devices
EN 1886, Ventilation for buildings - Air handling units - Mechanical performance
EN 13053, Ventilation for buildings — Air handling units — Rating and performance for units,
components and sections
EN 15287-1, Chimneys — Design, installation and commissioning of chimneys — Part 1: Chimneys for
non-roomsealed heating appliances
EN 15287-2, Chimneys - Design, installation and commissioning of chimneys - Part 2: Chimneys for
roomsealed appliances
prEN 16798-1, Energy performance of buildings — Part 1: Indoor environmental input parameters for
design and assessment of energy performance of buildings addressing indoor air quality, thermal
environment, lighting and acoustics — Module M1-6
EN 16798-3:2017, Energy performance of buildings — Part 3: Ventilation for non-residential buildings —
Performance requirements for ventilation and room-conditioning systems
CEN ISO/TR 52000-2, Energy performance of buildings — Overarching EPB assessment — Part 2:
Explanation and justification of ISO 52000-1 (ISO/TR 52000-2)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 16798-3 apply.
NOTE More information on some key EPB terms and definitions is given in CEN ISO/TR 52000-2.
4 Symbols and subscripts
4.1 Symbols
For the purposes of this Technical Report, the symbols as mentioned and given in the accompanied EPB
standard, EN 16798-3, apply.
More information on key EPB symbols is given in CEN ISO/TR 52000-2.
4.2 Subscripts
For the purposes of this Technical Report, the subscripts as mentioned and given in the accompanied
EPB standard, EN 16798-3, apply.
More information on key EPB subscripts is given in CEN ISO/TR 52000-2.
5 Brief description of the method and routing
5.1 Output of the method
See same Clause in EN 16798-3.
5.2 General description of the method
See same Clause in EN 16798-3.
6 Calculation method
This report contains additional designing and calculation aspects. See EN 16798-3 for further
explanations and links to other related EPB Standards.
7 Indoor Environment
7.1 General
See same Clause in EN 16798-3.
7.2 Occupied zone
See same Clause in EN 16798-3
8 Agreement of design criteria
8.1 General
8.2 Principles
See same Clause in EN 16798-3.
8.3 General building characteristics
8.3.1 Location, outdoor conditions, neighbourhood
See same Clause in EN 16798-3.
8.3.2 Design weather data
See same Clause in EN 16798-3.
8.3.3 Information on the operation of the building
See same Clause in EN 16798-3.
8.4 Construction data
See same Clause in EN 16798-3.
8.5 Geometrical description
See same Clause in EN 16798-
...