oSIST prEN IEC 63533:2026

SLOVENSKI STANDARD
01-april-2026
Germicidna oprema - Inaktivacija mikroorganizmov v zraku z germicidnimi
ultravijoličnimi (GUV) svetilkami
Germicidal equipment - Airborne microorganisms inactivation by Germicidal Ultraviolet
(GUV) luminaires
Équipement germicide - Inactivation des microorganismes en suspension dans l'air par
des luminaires germicides à ultraviolets (GUV)
Ta slovenski standard je istoveten z: prEN IEC 63533:2026
ICS:
11.080.99 Drugi standardi v zvezi s Other standards related to
sterilizacijo in dezinfekcijo sterilization and disinfection
29.140.99 Drugi standardi v zvezi z Other standards related to
žarnicami lamps
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

34/1420/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 63533 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2026-02-06 2026-05-01
SUPERSEDES DOCUMENTS:
34/1307/CD, 34/1325A/CC
IEC TC 34 : LIGHTING
SECRETARIAT: SECRETARY:
United Kingdom Mr Petar Luzajic
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):

ASPECTS CONCERNED:
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which
they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries”
clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for
submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Germicidal equipment - Airborne microorganisms inactivation by Germicidal Ultraviolet (GUV)
luminaires
PROPOSED STABILITY DATE: 2029
NOTE FROM TC/SC OFFICERS:
this electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee
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IEC CDV 63533 © IEC 2026
1 CONTENTS
3 FOREWORD . 2
4 INTRODUCTION . 4
5 1 Scope . 5
6 2 Normative references . 5
7 3 Terms and definitions . 5
8 4 Microorganism selection and test setup . 7
9 4.1 Microorganism selection . 7
10 4.1.1 Selected test microorganism . 7
11 4.1.2 Microorganism culture medium and cultivation method . 7
12 4.2 Test chamber . 7
13 4.3 Reagents and chemicals . 9
14 4.4 Installation of DUT into test chamber . 9
15 5 Determination of microorganism natural decay rate . 9
16 5.1 Initialization . 9
17 5.2 Introduction of microorganisms . 9
18 5.3 Stirring . 9
19 5.4 Sample collection . 9
20 5.5 Microorganism uniformity assessment . 9
21 5.6 Calculation of natural decay rate . 9
22 5.7 Refreshing test chamber . 9
23 6 Determination of microorganisms decay rate with active DUT . 10
24 6.1 Initialization . 10
25 6.2 Introduction of microorganisms . 10
26 6.3 Stirring . 10
27 6.4 Sample collection . 10
28 6.5 Microorganism uniformity assessment . 10
29 6.6 Calculation of decay rate with DUT operating . 10
30 6.7 Refreshing test chamber . 10
31 7 Equivalent clean air delivery rate (CADR) . 10
32 7.1 Calculating the clean air delivery rate (CADR ) . 10
33 8 Reporting. 11
34 8.1 Equivalent clean air delivery rate . 11
35 Report CADR in (m /h) . 11
surrogate
36 8.2 Test Conditions . 11
37 8.3 Device under test (DUT) details . 11
38 Bibliography . 13
IEC CDV 63533 © IEC 2026
42 INTERNATIONAL ELECTROTECHNICAL COMMISSION
43 ____________
45 GERMICIDAL EQUIPMENT - AIRBORNE MICROORGANISMS INACTIVATION
46 BY GERMICIDAL ULTRAVIOLET (GUV) LUMINAIRES
49 FOREWORD
50 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
51 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
52 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in
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55 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
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58 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
59 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
60 consensus of opinion on the relevant subjects since each technical committee has representation from all
61 interested IEC National Committees.
62 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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65 misinterpretation by any end user.
66 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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68 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
69 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
70 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
71 services carried out by independent certification bodies.
72 6) All users should ensure that they have the latest edition of this publication.
73 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
74 members of its technical committees and IEC National Committees for any personal injury, property damage or
75 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
76 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
77 Publications.
78 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
79 indispensable for the correct application of this publication.
80 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
81 rights. IEC shall not be held responsible for identifying any or all such patent rights.
82 IEC 63533 ED1 has been prepared by IEC technical committee 34: Lighting. It is an
83 International Standard.
84 The text of this International Standard is based on the following documents:
Draft Report on voting
XX/XX/FDIS XX/XX/RVD
86 Full information on the voting for its approval can be found in the report on voting indicated in
87 the above table.
88 The language used for the development of this International Standard is English.
IEC CDV 63533 © IEC 2026
89 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
90 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
91 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
92 described in greater detail at www.iec.ch/publications.
93 The committee has decided that the contents of this document will remain unchanged until the
94 stability date indicated on the IEC website under webstore.iec.ch in the data related to the
95 specific document. At this date, the document will be
96 • reconfirmed,
97 • withdrawn,
98 • replaced by a revised edition, or
99 • amended.
IEC CDV 63533 © IEC 2026
101 INTRODUCTION
102 Microorganisms spread by touch (direct person-to-person or indirect via surface transfer), spray
103 (ballistic droplets) and inhalation of airborne aerosols are causing diseases such as COVID-19.
104 The spread of microorganisms by touch and the transmission of droplets can be reduced by
105 surface cleaning including washing hands, use of personal protective equipment (PPE) such as
106 facial masks which cover the nose and mouth and appropriate behaviours such as social
107 distancing. The spread and inhalation of microorganisms by aerosols can be reduced by use of
108 medical PPE and/or air cleaning. Air cleaning can be achieved by air replacement utilising
109 ventilation (either natural and/or mechanical) and/or air disinfection technologies such as
110 Germicidal Ultraviolet (GUV).
111 While human studies have proven the effectiveness of GUV disinfection systems at specific
112 wavelengths and irradiance dosage, a standardized method to quantify microbial cleaning
113 capabilities of GUV luminaires is needed to help ensure unambiguous GUV luminaire product
114 characterization. Microbial clean air delivery rate, that can be determined in a defined test
115 chamber, can be used to quantify the microbial cleaning capabilities of the GUV luminaires in
116 a real applications. This international standard provides a method to quantify microbial cleaning
117 capabilities of GUV for target microorganisms. Requirements for a test chamber and calculation
118 method are given in this document; there are no product requirements for GUV luminaires.
119 The tests given in this standard should be performed by expert staff trained to handle
120 microorganism-related techniques and in properly equipped laboratories under the supervision
121 of a skilled microbiologist. Some of the test microorganisms might be facultative pathogens for
122 humans, animals and plants and requires a laboratory of an appropriate bio-safety level.
123 National and international safety procedures for working with infectious biomaterials should be
124 followed to prevent any contamination of laboratory staff, apparatus, working place or
125 environment in compliance with national standards or regulations. This document does not
126 purport to address all of the safety aspects, if any, associated with its use. It is the responsibility
127 of the user to establish appropriate safety and health practices and ensure compliance with any
128 national, regional, or international regulatory conditions.
IEC CDV 63533 © IEC 2026
130 GERMICIDAL EQUIPMENT - AIRBORNE MICROORGANISMS INACTIVATION
131 BY GERMICIDAL ULTRAVIOLET (GUV) LUMINAIRES
133 1 Scope
134 This document specifies a method of quantification of the airborne microorganisms inactivation
135 capabilities of GUV luminaires containing sources with wavelengths in the range of 185 nm to
136 400 nm.
137 This document does not apply to:
138 1) Devices utilizing visible radiation for disinfection
139 2) GUV sources and GUV controlgear
140 3) Devices for the disinfection of water or other liquids or surfaces only
141 4) GUV devices for mounting in heating, ventilating, and air-conditioning systems.
142 5) GUV devices combining GUV with mechanical filters or chemical additives.
143 6) Devices utilizing ionisation air cleaning technologies
144 7) Medical devices
145 2 Normative references
146 The following documents are referred to in the text in such a way that some or all of their
147 content constitutes requirements of this document. For dated references, only the edition
148 cited applies. For undated references, the latest edition of the referenced document (including
149 any amendments)
...