prEN 17242

SLOVENSKI STANDARD
01-junij-2018
Omare za recirkulacijsko filtriranje dima
Recirculatory Filtration Fume Cupboards
Umluft-Filter-Einhausung
Sorbonnes à recirculation
Ta slovenski standard je istoveten z: prEN 17242
ICS:
71.040.10 Kemijski laboratoriji. Chemical laboratories.
Laboratorijska oprema Laboratory equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2018
ICS 71.040.10
English Version
Recirculatory Filtration Fume Cupboards
Sorbonnes à recirculation Umluft-Filter-Einhausung
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 332.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN 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, 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17242:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Classification of Recirculatory Filtration Fume Cupboards . 5
5 Requirements of Recirculation Filtration Fume Cupboards . 6
5.1 General requirements . 6
5.2 Gas and vapour filtration . 6
5.3 Particulate filtration . 7
5.4 Filter monitoring arrangements . 7
6 Performance tests for Recirculation Filtration Fume Cupboards . 8
6.1 Test rooms and test conditions for filtration and containment test . 8
6.2 Filtration of gases and vapours . 8
6.3 Test of gas and vapour sensors . 14
6.4 Filtration for particulates . 15
7 Containment . 15
7.1 Test equipment . 15
7.2 Data recording . 16
7.3 Test condition . 16
7.4 Sampling probe grid . 16
7.5 Test procedure . 17
7.6 Data analysis and results . 18
8 Commissioning and routine testing of Recirculatory Filtration Fume Cupboards . 19
9 Marking . 19
10 Product manual . 19
Bibliography . 21

European foreword
This document (prEN 17242:2018) has been prepared by Technical Committee CEN/TC 332
“Laboratory equipment”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
1 Scope
This document applies to Recirculatory Filtration Fume Cupboards (RFFC).
Recirculation Filtration Fume Cupboards are devices intended to protect their users by means of:
— the ability to contain potentially hazardous materials;
— the ability to remove potentially hazardous materials from air exhausted from within the fume
cupboard by means of filtration before the air is recirculated (to the room in which the fume
cupboard is located).
This document includes design and manufacturing requirements together with type testing procedures.
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 14175-1, Fume cupboards — Part 1: Vocabulary
EN 14175-2, Fume cupboards — Part 2: Safety and performance requirements
EN 14175-3, Fume cupboards — Part 3: Type test methods
EN 14175-4, Fume cupboards — Part 4: On-site test methods
EN 14175-6, Fume cupboards — Part 6: Variable air volume fume cupboards
EN 1822-1, High efficiency air filters (EPA, HEPA and ULPA) — Part 1: Classification, performance testing,
marking
EN ISO 14644-3:2005, Cleanrooms and associated controlled environments — Part 3: Test methods (ISO
14644-3:2005)
EN ISO 14644-1, Cleanrooms and associated controlled environments — Part 1: Classification of air
cleanliness by particle concentration (ISO 14644-1)
3 Terms and definitions
For the purpose of this document, the terms and definitions given in EN 14175-1 and the following
apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1
filtration system
assembly of components that are used to remove/trap airborne contaminants
Note 1 to entry: It can be arranged to remove/trap particulates and/or gases/vapours by means of a single
filter or a combination of two or more filters.
3.2
filtration fume cupboard
FFC
fume cupboard equipped to remove materials from the exhaust air stream
3.3
recirculation filtration fume cupboard
RFFC
fume cupboard equipped to remove materials from the exhaust air stream before recirculation to the
room in which it is located
3.4
gas and vapours filter
filter used to remove vapours or gases from an air stream
Note 1 to entry: It could for example, be an activated carbon filter.
3.5
particulate filter
filter used to remove particulates from an air stream
Note 1 to entry: It could for example, be HEPA filter.
3.6
pre-filter
intial stage of filtration used to remove particulates and/or gases/vapours prior to other components
(of a filtration system) having higher removal efficiencies
3.7
limit value
exposure limit of the challenge chemicals
−6
Note 1 to entry: Expressed in 10 (ppm V) or in mg/m .
Note 2 to entry: In this standard the value is the lowest published limit in GESTIS databases.
4 Classification of Recirculatory Filtration Fume Cupboards
The filtration fume cupboard of the present standard has the following 3-part classification:
X (general type of application) / Y (filters class) / Z (monitoring arrangements)
The details are set out below.
General type of application:
— Class A: RFFCs with integral filters;
— Class B: RFFCs with associated filters.
Filters:
— 1: particulate filter;
— 2: gas and vapour filter;
— 3: particulate and gas and vapour filters;
— 4: other filtration devices or arrangements including those for FFCs having internal, filtered
recirculation.
Filter monitoring arrangements:
— 0: no filter condition monitoring arrangements;
— 1: in-built continuous filter condition monitoring arrangements.
EXAMPLE
Examples for the designation of a RFFC with integral particulate and chemical filters and continuous filter
conditioning monitoring would be:
Class A / 3 / 1 .
5 Requirements of Recirculation Filtration Fume Cupboards
5.1 General requirements
Filtration fume cupboards shall fulfil the requirements as given in EN 14175-2 with addition of the
following chapters.
NOTE In many cases the life and efficiency of filters can be extended by pre-treatment of the extracted air.
5.2 Gas and vapour filtration
The chemicals that can be removed by the filtration system shall be identified by a label carrying the
same information as that given to the operator in Clause9 Marking.
For filtration evaluation reference should be made to the GESTIS International Limit Values from which
the lowest limit values should be used. When a particular chemical under consideration is not in this
list, an individual risk assessment shall be carried out to establish the suitability of filtration fume
cupboard.
The filtration system of filtration fume cupboards shall be resistant to chemical agents allowed of being
used in the filtration fume cupboards.
The design of the filtration system shall be such that filters can be changed by someone suitably trained
without them requiring physical contact with the filter itself. Safe methods of changing filters shall be
fully described in the product manual.
The filter installation date and its latest projected replacement date shall be indicated on the front of the
FFC or in the fume cupboard log book attached to the fume cupboard manual.
NOTE Back-up gas and vapour filters, located after the primary gas and vapour filter can be requested by
regulations, guidelines or recommendation in some countries.
RFFCs of classes A or B shall be submitted to the following tests:
— in the case of filters designed to be used with volatile organic chemicals: two successive types tests
shall be made, one with cyclohexane (C H ; CAS n°110-82-7) and the other with isopropanol
6 12
(C H O; CAS n° 67-63-0). Each test shall be performed with a new filter following the procedure
3 8
described in 6.2;
— in the case of filters designed to be used with acid vapours: a type test will be carried out with
hydrochloric acid (HCl; CAS n° 7647-01-0) following the procedure described in 6.2;
— in the case of filters designed to be used with amines: a type test will be carried out with ammonia
(NH ; CAS n° 7664-41-7) following the procedure described in 6.2;
— in the case of filters designed to be used with formaldehyde: a type test will be carried out with
formaldehyde (CH O; CAS n° 50-00-0) following the procedure described in 6.2.
The filtration system of RFFCs of classes A and B shall not have a release at the filter or filters exhaust of
more than 1 % of the exposure limit value within the adsorption or chemisorption of the minimum
quantities (LOW) of chemicals listed in 6.2.
5.3 Particulate filtration
RFFCs of classes A or B equipped with filter systems of type 1 or 3 shall have a particulates filter.
NOTE For example HEPA filters with efficiency H14 at least, as defined in EN 1822-1.
During the life of the filter its pressure drop will increase as it loads. This should be monitored to
ensure that manufacture's recommendations are not exceeded.
5.4 Filter monitoring arrangements
5.4.1 Fume cupboards without continuous filter monitoring
Fume cupboards without continuous filter monitoring shall have
...