Fume Cupboards: Suppliers & Repairers R9a - August 2004 (Updated Dec '04, Mar '05 & Aug '07)
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Fume Cupboards:
Suppliers & Repairers
R9a
August 2004
(Updated Dec ’04, Mar ’05 & Aug ’07)
August 2004
DUCT
DAMPER
R9a
BYPASS
BAFFLE
Fume Cupboards: Suppliers & Repairers
SASH
FACE WORKING
VELOCITY APERTURE
WORK SURFACE
CONTENTS
Page
How this guide is arranged 1
WARNINGS 1
1. Introduction 2
1.1 The scope of this guide 2
1.2 The purpose and limitations of this guide 2
2. Buying a fume cupboard 2
3. Services 3
4. Choosing the type of fume cupboard 3
4.1 A fixed fume cupboard with a rigid duct 4
4.2 A mobile fume cupboard with a filter 4
4.3 A mobile fume cupboard with a flexible duct 5
5. Filters 5
5.1 Alternative sources of filters 5
5.2 Fitting filters 6
6. Existing fume cupboards: failure, repair and upgrading 6
7. Installation and commissioning 6
8. Data Sheets: Construction and performance of fume cupboards 7
8.1 The grouping of the Data Sheets 7
8.2 Information on the Data Sheets 7
8.3 Companies omitted 10
8.4 Ducted fume cupboards Attached
8.5 Filter fume cupboards Attached
8.6 Mobile, ducted fume cupboards Attached
9. Appendix A: Fume cupboards and Companies excluded from this guide Attached
10. Appendix B: Endorsement of installers’ policy Attached
11. Appendix C: Addresses Attached
Acknowledgements
We are grateful to fume cupboard manufacturers for their full co-operation.
This Guide replaces R9a, Fume Cupboards: Suppliers and Repairers (February 2001).
Strictly confidential
Circulation to Members and Associates only
© CLEAPSS® 2004 (+ some updates in 2005 & 2007) CLEAPSS
The Gardiner Building
Brunel Science Park
Uxbridge UB8 3PQ
Tel: 01895 251496
Fax: 01895 814372
E-mail: science@cleapss.org.uk
Web site: www.cleapss.org.ukR9a FUME CUPBOARDS: SUPPLIERS & REPAIRERS
A guide to school fume cupboards meeting the recommendations of Building Bulletin 88.
How this guide is arranged
To aid continual revision, pages with details of fume cupboards, tables listing fume cup-
boards considered, a list of suppliers endorsing Building Bulletin 88 and the list of address-
es are not numbered and are placed after the numbered pages. The date each was added is
given on the bottom of the page.
PLEASE READ THIS BEFORE PURCHASING A FUME CUPBOARD!
WARNINGS
Purchasers are strongly advised to be familiar with
DEPARTMENT FOR EDUCATION & EMPLOYMENT (DfEE) BUILDING BULLETIN 88:
FUME CUPBOARDS IN SCHOOLS1.
SITING & INSTALLATION (See section 7 of this guide.)
Purchasers of a fume cupboard should be aware that:
• its siting, to allow full pupil access and avoid interference from doors and windows, and
• the installation of an appropriate fan, ducting and fume discharge,
are as important as the design of the fume cupboard itself in determining whether the cupboard
will meet the air-flow recommendations of Building Bulletin 88 and should be considered at an
early stage of the planning of a new laboratory or of an upgrading. Purchasers should realise
that a ducted installation is likely to cost more than the fume cupboard itself. Building Bulletin 88
gives advice on both siting and installation.
Purchasers are strongly advised to have fume cupboard installations, including the ducting and
fan, carried out by the supplier of the fume cupboard; failing that, installation must be by another
specialist firm or at least under the supervision of a qualified ventilation engineer familiar with
Building Bulletin 88; see section 7 of this guide.
Aesthetic considerations and any attempt to cut costs should not result in any fume cupboard
and its installation falling below the recommendations of Building Bulletin 88.
The installer should provide a commissioning certificate based on Appendix C of Building
Bulletin 88 and commission a new or refurbished fume cupboard in the presence of school
science staff; see section 7 of this guide.
PURCHASE
Purchasers should agree with the supplier on the specifications of any fume cupboards to be
purchased and not assume that this guide gives exact specifications. Building Bulletin 88 App-
endix C gives guidance.
Suppliers should provide information to enable the fume cupboard to be used safely, on the
fume cupboard and, preferably, also in a manual. This is particularly important for filter fume
cupboards.
Some suppliers may suggest to clients that BB88 has been superseded by BS 7258 or is about
to be superseded by the European Standard BS EN 14175, currently appearing part by part.
This is untrue2.
1 Building Bulletin 88 Fume Cupboards in Schools, DFEE 1998, ISBN 0112710271, £14.95 from The Stationery Office (TSO)
Publications Centre, PO Box 29, Norwich NR3 1GN. Tel: 0870 600 5522; Fax: 0870 600 5533; E-mail: bookorders@
tso.co.uk; Web site: www.tso.co.uk/bookshop.
2 The Foreword to British Standard 7258 (page 2) suggests that Design Note 29, the predecessor to BB88, may be more
appropriate for some applications: ‘Where it is known for particular fume cupboards that the rates of release of hazardous gases
and vapours are low or where the fume cupboards are used intermittently and then only for short periods, the performance-type
test procedure may be too stringent. In such situations the requirements of this Part of BS7258 are not applicable and reference
should be made to other appropriate standards such as Design Note 29 ...’.
11. Introduction
1.1 The scope of this guide
This guide covers fume cupboards, ducted and filter-type, which meet, at a reasonable price, the
main recommendations of the DfEE Building Bulletin 88, Fume Cupboards in Schools, the successor
to Design Note 29. Fume cupboards conforming to these recommendations are considered to offer
adequate protection for normal school science up to and including A-level, both for use by teachers
and pupils in the laboratory and technicians in the preparation room; their containment is such
that the requirements of the COSHH Regulations1 will be met.
CLEAPSS strongly recommends Building Bulletin 88, which should be used in conjunction with
this guide.
CLEAPSS can also provide a set of notes, L9b, Monitoring fume cupboards, intended primarily for
those attending courses run by the CLEAPSS School Science Service; advice conforms with that in
Building Bulletin 88. Although school technicians are, with suitable training, capable of monitoring
fume cupboards, CLEAPSS can suggest companies which will carry out the work in its leaflet PS48,
Fume Cupboard-Testing Contractors. Further information on fume cupboards is included in the
CLEAPSS Laboratory Handbook, sections 8.3 and 20.10. Both PS48 and the Laboratory Handbook are
also available on the CLEAPSS Science Publications CD-ROM.
1.2 The purpose and limitations of this guide
The purpose of this guide is to provide outline information. Several manufacturers have made it
clear that they expect to vary the designs of their fume cupboards to meet the wishes of their cust-
omers and to try out new ideas; it is the view of the CLEAPSS School Science Service that Building
Bulletin 88 is not intended to be a precise specification of all the features of a fume cupboard. Thus
the descriptions of fume cupboards in this guide should not be regarded as specifications for
contractual purposes.
However, the main recommendations of Building Bulletin 88, concerned with face velocity, working
height and half the working height, are reasonably precise and should be observed; in the case of
filter fume cupboards, so also should recommendations concerning filter efficiencies, copied here
from Building Bulletin 88. Inclusion of a fume cupboard in this guide implies that the recom-
mendations were met in the models tested.
2. Buying a fume cupboard
When installing a new fume cupboard, always obtain at least three quotations. See also the
Warnings on page 1. Ask the supplier whether any fume cupboards have been installed in recent
years in local schools and then contact the staff at that school for their opinion. We believe the
companies whose products are described in this guide will prove satisfactory but we would be
interested to hear of any problems. We would advise schools not to deal with companies that are
not listed in this guide and to be suspicious of designs not included.
The company that produces the cheapest fume cupboard (as listed in this guide) may well not be
the cheapest when the cost of ducting, fan and installation is taken into account but these costs will
vary from site to site. The overall price is likely to be two, three or even four times the cost of the
cupboard. We found a variation of over 50% for the same job between the least and most expensive
of five companies. The second-cheapest overall quotation had the most expensive fume cupboard.
In practice, what the companies were proposing to do was not the same in every case – they came
up with different solutions for the same problems and often identified different problems. This in
1 The Control of Substances Hazardous to Health Regulations. See Control of substances hazardous to health (Fourth edition)
Approved Code of Practice, HSE, ISBN 0717625346, £10.50. Available from HSE Books, PO Box 1999, Sudbury, Suffolk
CO10 2WA; Tel: 01787 881165; Fax: 01787 313995; E-mail: hsebooks@prolog.uk.com; Web site: www.hsebooks.co.uk.
Exposure limits are published annually in Guidance Note EH40 Occupational Exposure Limits, also from HSE Books.
CLEAPSS has, for this edition of the guide, reviewed in detail the releases of toxic fumes from school practical science
procedures in the light of recent exposure limits and concluded that, apart from an exceptionally large release of sulphur
dioxide caused by the tap on a cartridge of the gas jamming open, all will be adequately contained by a fume cupboard
conforming to the recommendations of BB88.
HSE comments were taken into account in the drafting of Building Bulletin 88 and the HSE supported the similar face velocity
requirements of its predecessor, Design Note 29: “Without prejudice to the need to consider each installation and use on its own
merits, in normal circumstances the minimum face velocity requirements of DES (predecessor of the DfEE) Design Note 29 are
considered suitable for maintaining adequate control of exposure when applied to general school science work.” Internal HSE
Minute, 1989.
2itself can be quite instructive. If one supplier has identified a problem, it is worth asking another
company how it would propose to deal with it. Do not be put off by jargon; ask for an explanation;
if necessary, consult the CLEAPSS Helpline 01895 251496. The cheapest solution is not necessarily
the best. For example, if an existing fume cupboard has to be removed, is it lined with asbestos
board? Has the company identified the possibility of asbestos and is it authorised to deal with its
removal? One LEA was prosecuted in such circumstances. Do, however, respect the knowledge
that the companies bring on issues such as siting (see Warnings, page 1).
Where the fume cupboard is to be part of a new building or major refurbishment, it may be found
that the company given the main furnishing contract has its own preferred fume cupboard. How-
ever, with Private Finance Initiative (PFI) funding for laboratory building and refurbishment, inc-
reasingly the installation of fume cupboards is given low priority and portable, recirculatory, filter
fume cupboards are often installed without any consideration of their limitations. Science depart-
ments are advised to stipulate in advance that at least some of the fume cupboards are ducted.
When a fume cupboard has been installed, it should be commissioned, ie, the supplier should test
it and provide a report which shows that it performs according to specification. With PFI contracts,
despite difficulties in making arrangements, it is essential that commissioning takes place when
science staff are present and that they see the report; see section 7.
3. Services
To carry out inside a fume cupboard all the activities which need its protection, the services of
mains electricity (on a different circuit from the fan motor which must continue to operate if the
outlet supply trips), a fuel gas (normally mains gas) and water with drainage are needed. Usually
electric socket outlets are mounted on the outside of a fume cupboard. Gas and water outlets (with
a drip cup below the water outlet connected to the drainage system) are mounted inside the fume
cupboard with their controls outside (Building Bulletin 88, Section 3 and 4.35 to 4.49).
The extent to which services are required affects the choice of fume cupboard. Services for filter
fume cupboards pose particular problems. The fittings for connections to gas, water and drainage
are best installed in a laboratory when refurbishment takes place at an appropriate site, usually at
or close to floor level. Flexible gas hoses should be “as short as is reasonably practicable and
should not exceed 1.4 m in length”1. This severely restricts the movement of these portable cup-
boards around a laboratory.
Liquid waste is often a corrosive solution or an organic solvent, both of which can affect the struc-
ture of the piping and, over time, may cause leaks. This can be avoided by flushing waste away
thoroughly.
4. Choosing the type of fume cupboard
The main possibilities are:
• a fixed fume cupboard with a rigid duct;
• a mobile fume cupboard with a filter;
• a mobile fume cupboard with a flexible duct.
Too often, architects and others are attracted by the apparent ease of installing filter-type fume
cupboards without considering their disadvantages as well as their advantages. The lower capital
cost is also appealing but the DfES2 considers lifetime cost more relevant; in most cases, the life-
time costs for a ducted cupboard will be appreciably lower than for a filter fume cupboard: see
section 4.3.
The arguments for and against different types of fume cupboard are given in Building Bulletin 88
Section 3; what follows is a summary.
1 Gas Installations for Educational Establishments, UP/11, 2004, International Institution of Gas Engineers and Managers.
2 Asset Management Plans. Section 1 Framework, DfEE, 1999. Available from DfES Publications, PO Box 5050, Sherwood
Park, Annesley, Nottingham NG15 0DJ. Tel: 0845 602 2260; Fax: 0845 603 3360; E-mail: dfes@prolog.uk.com; Web site:
www.dfes.gov.uk.
34.1 A fixed fume cupboard with a rigid duct
Typically, such fume cupboards are fixed against a wall1.
Advantages Disadvantages
Full services easy to provide. Poor visibility for pupils, unless placed in the centre of a long
wall or has transparent sides.
Service lines (pipes and cables) well pro-
tected. Cannot be moved at all.
No significant running costs; will run for Cost of ducting system.
years without significant replacement
costs. Aesthetic considerations; the external ducting/flue may need
planning permission.
4.2 A mobile fume cupboard with a filter
In these fume cupboards, which are on trolleys, the contaminated air leaving the fume cupboard
passes through a filter which removes the contaminants and is recirculated back into the room,
hence the name ‘recirculatory’ for such fume cupboards. However, if the fume cupboard has full
services, mobility is limited by the siting of service-connection points.
Advantages Disadvantages
Much better visibility for pupils than with a The filter(s) need testing for saturation at least every 14
fixed fume cupboard. months; the testing is more time consuming than for face
velocity. This test is therefore more expensive and not all
Can be moved to wherever there are contractors are equipped for it.
connections for the services.
Less robust than other types of fume cupboard, eg, fan
No costly ducting system; saving in cap- motors can need replacement after some years.
ital costs.
Filters must be replaced periodically. Science departments
Can be moved from a school which is need to budget for replacement filters and prefilters, a signifi-
closing or a laboratory for which its use is cant running cost. There is a dangerous temptation not to
being changed, and used elsewhere. replace them at the necessary frequency.
After replacing a filter, a test is required to ensure that it is in
the correct position and not leaking fumes.
The filters remove a high proportion of fumes, not all. The
remaining fumes, although at a safe concentration, can be
smelt, giving rise to false alarms.
Cost of special service connection points.
It might be impossible or expensive to obtain a replacement
filter if the supplier goes out of business or ceases to supply
the particular filter as standard after, say, 10 years, when it
will make the filter only as a ‘one-off’ at a high price.
One possibility, if there is a fully-serviced ducted fume cupboard in a science department as well
as the filter-type fume cupboard, is to do without water, gas and waste lines on the latter fume
cupboard. Gas can be brought from a nearby point direct to a Bunsen burner when needed.
(CARE! if the tube is long.) Similarly, water can be brought to and from any condenser as required.
However, disposal of liquid toxic waste, generated in the fume cupboard, is very difficult without
a plumbed-in water supply; considerable dilution is required.
1 One company has introduced a fixed demonstration fume cupboard on a peninsular bench which has better visibility than
usual fixed fume cupboards. CLEAPSS cannot recommend it at present as the bypass is inadequate but, as it is without most of
the limitations of mobile ducted fume cupboards, the general idea is apt, at a time when the DfES has increased the
recommended laboratory size.
44.3 A mobile fume cupboard with a flexible duct
Such fume cupboards are on a trolley and connected through a length of flexible ducting to a fixed
ventilation duct; services are provided through flexible lines (hoses and cables). Often mobility is
limited to pulling the fume cupboard out from the wall so that the teacher can work at the opening
with the class round the back and sides. However, with some installations, it is possible to
disconnect the flexible ventilation duct and the other service lines and move the fume cupboard to
other positions where connections can be made. Particular care must be taken when disconnecting
the drainage hose as it may be contaminated with noxious substances.
Advantages Disadvantages
Much better visibility for pupils than with Flexible hoses and cables to the fixed service connection
a fixed fume cupboard. points are vulnerable and will need periodic replacement.
Can be moved to wherever there are Connection and disconnection takes time and so, in practice,
connections for the ventilation and the mobile fume cupboards are seldom moved further than out
services. from the wall. Some employers insist on a CORGI-registered
fitter to change gas connections.
Can be moved from a school which is
closing or a laboratory for which its use is Cost of ducting system and special service connection points.
being changed, and used elsewhere.
Aesthetic considerations; the external ducting/flue may need
No significant running costs. planning permission.
5. Filters
In producing this guide, CLEAPSS has tested many filters and has been concerned by the number
failing to meet the efficiencies listed in Table 4.1 of Building Bulletin 88, reproduced in section 8.2 of
this guide. The small number of filter-type fume cupboards included in the guide reflects this.
Intending purchasers and users need to have some understanding of filters: the quality of these
items cannot be assessed without careful measurement.
Prefilters are for extracting particulates such as those in dust and smoke. They need to be replaced
more often but are much less expensive than the main filter. A problem in purchasing these is that
they are often sold in packets of 10 which is probably at least 5 years supply for most schools;
spares must be kept very well sealed in a polythene bag.
Main filters consist of active carbon. However, active carbon is inefficient at absorbing inorganic
gases, which are the main hazards in school chemistry, and needs to be chemically treated to
absorb both acid gases, such as sulfur dioxide and chlorine, and alkali gases, such as ammonia.
Treated carbon is more expensive than untreated and an awareness of the efficiencies in Table 4.1
of Building Bulletin 88 (see section 8.2) is needed to ensure that filters are adequate. Too often,
however, the companies that sell filter fume cupboards also sell inadequate filters. They employ
nobody with an understanding of chemistry, do not have the equipment for chemical-efficiency
testing and are not prepared to buy in expertise for testing.
The efficiencies in Table 4.1 of Building Bulletin 88 are necessary to meet the requirements of the
COSHH Regulations. However, also important is capacity: the mass of gas which a filter can absorb
before efficiencies become too low to do this. This is related to the mass of the filter; a 20 kg filter is
likely to have a larger capacity than a 12 kg one. Whether it is better value depends partly on
school policy; if the filter is replaced every two years whether saturated or not, a lighter filter may
be better value.
5.1 Alternative sources of filters
It has been normal practice to buy filters from the manufacturer of the fume cupboard. This is an
expensive commitment. There is, however, one company, Active Carbon Filters, which will make a
bespoke filter that is less expensive than the filter sold by the fume-cupboard manufacturer. The
company takes the measurements of a filter and constructs its own. A filter tested at CLEAPSS
performed satisfactorily. Filters from other companies have not been found to perform efficiently
so care must be taken if buying from a company other than the fume-cupboard manufacturer.
55.2 Fitting filters
The gasket of a filter must fit very tightly so that all the air containing the fumes extracted from a
cupboard does pass through the filter; it must not find the path of least resistance by escaping
through a small crevice in the gasket. Gases less dense than air, such as ammonia, are most likely
to bypass the filter. Most filters use gravity to help form a good seal although one manufacturer
has a clamping device to force the filter gasket against a flange.
When replacing a filter, it is most important to ensure that the flange on which the filter sits is very
clean before fitting the new filter. The gasket should also be examined carefully to look for any
signs of damage; the area where the two ends of the gasket meet is a particular region to scrutinise.
Filters are very heavy (12-20 kg); two people must be involved in manipulating and fitting them to
avoid manual-handling injuries and also prevent damage to the filter gasket during installation.
6. Existing fume cupboards: failure, repair and upgrading
The issues raised by already-installed fume cupboards failing, and their repair and upgrading, are
covered at length in Building Bulletin 88, Section 8. Here we can only summarise.
Fume cupboards that do not meet the working height - minimum face-velocity requirements of
Building Bulletin 88 Section 4.5 and 4.151 should not be used. However, failure to meet minor rec-
ommendations, eg, that there should be a lip along the front of the work surface, is not a cause of
failure. Whether or not the presence of asbestos-cement panels results in failure is a matter for an
employer’s policy; it may be sufficient to seal them with paint. See Building Bulletin 88, Section 8.
Fume cupboards with a broken sash cord which might cause the sash to fall should not be used.
Attempts made in such circumstances to prop up the sash have caused accidents.
If an existing fume cupboard fails the air-flow test, it is worth considering possible reasons and
actions. For example, has there been a gradual deterioration over time, or was it a sudden failure?
Could a bird’s nest be blocking the duct or a plastic bag have become wrapped around the fan?
Using a local electrical contractor to replace a motor may be cheaper than calling in a firm of fume
cupboard specialists.
Almost all the companies making the ducted fume cupboards described in this guide are able
either to test and, if necessary upgrade, existing fume cupboards and their fans and ducting, or
suggest companies which can. Often they will recommend the replacement rather than the up-
grading of an existing fume cupboard. While such recommendations should be examined care-
fully, it is often the cost-effective alternative: upgrading is a ‘one-off’ job involving work on site
which can easily require more time than the construction and installation of a standard model.
Companies which have carried out successful upgrading include: Associated Laboratory Services
(Tel: 01376 322938), Fume Cupboard Design (Tel: 01233 642677), Regal Fans (Tel: 01376 342914) and
TLS (Tel: 01732 852250); full addresses are given in Appendix C. CLEAPSS is always glad to hear
reports from schools of upgradings, successful or otherwise.
7. Installation and commissioning
‘Ideally, the supply and installation of any fume cupboard should be carried out by the same
company; if two or more contractors are involved, it is often difficult to decide which is
responsible for a particular task’. Building Bulletin 88 p 26.
CLEAPSS cannot support this advice strongly enough; many of the problems arising from a school
fume cupboard occur when the supplier and the installer are different companies. The ex-works
price given in this guide does not include the price of: the fan, the ducting and flue, the installation
of these (which is likely to include some building work) and the connection of the services to the
appropriate mains. These cost more than the ex-works purchase price of the fume cupboard and
influence its performance considerably. However, while the suppliers included in this guide know
the requirements of Building Bulletin 88, a company carrying out the installation may not. This is
particularly true at the present time when there is more laboratory building and refurbishment
than for some years, most carried out through Private Finance Initiatives (PFI).
It is appreciated that science staff are not always able to influence decisions on installations; they
are particularly distanced from the relevant decision-making in schools built or improved through
1 At a working height of 400 mm or more, the minimum face velocity should equal or exceed 0.3 m s-1. The fume cupboard can
be used temporarily at a working height of 300-400 mm with a minimum face velocity equal to or exceeding 0.3 m s-1.
See Building Bulletin 88, Appendix B.
6PFI. They should ask to see the architect looking after the interests of the user, even if this requires
some sacrifice of time. Staff might, for example, have to stay on after school for a meeting, or even
come in during school holidays, but this is likely to be time well invested. To be effective, at least
one member of staff needs to have read Building Bulletin 88. Staff should insist on being present at
the commissioning and given full instructions and a copy of the certificate. Ultimately, such
arrangements may well cause less trouble than leaving this important event to the caretaker. One
supplier has pointed out that a return visit to carry out a special commissioning for school science
staff is likely to cost an installer more than the profit and may have to be charged for.
Appendix B is a list of installers that have agreed to the boxed statement below. CLEAPSS would
be interested to hear of any that do not appear to have done so.
Installing Fume Cupboards in Schools
The policy of this company when installing fume cupboards will be to follow the requirements of
Building Bulletin 88 Fume Cupboards in Schools. (DfEE, 1998, ISBN 0112710271).
In particular:
• Any fume cupboard installed shall meet the recommendations of Section 4 of Building
Bulletin 88. If the specifications exceed these recommendations unduly, eg, if an aerodyn-
amically-designed fume cupboard is to be installed, the customer shall be advised that it is
beyond DfEE recommendations.
• Sections 5, 6 and 7 shall be followed. Wherever possible, siting shall be discussed with
school science staff and the recommendations of Section 5 considered together.
• This company will display on the fume cupboard the information recommended by Building
Bulletin 88 paragraph 4.72.
• Commissioning shall use the schedules in Appendix C of Building Bulletin 88. Repres-
entatives of school science staff shall be present at the commissioning; architects’ and
contractors’ representatives may need to be reminded to invite them. If they are not pres-
ent at the main commissioning, this company undertakes to provide an extra commission-
ing for school science staff, free of extra charge. Science staff will be given a copy of the
commissioning certificate.
8. Data Sheets:
Construction and performance1 of fume cupboards
8.1 The grouping of the Data Sheets
These are arranged as below.
Fixed, ducted: section 8.4; Filter: section 8.5; Mobile, ducted: section 8.6.
Mobile, ducted fume cupboards can be considered as fixed, ducted fume cupboards mounted on
trolleys. An indication is given on the data sheet for a fixed, ducted fume cupboard if it can be
supplied in mobile, ducted form.
There are many fume cupboard suppliers in Britain and CLEAPSS makes no claim to have exam-
ined all models supplied for the school market. In section 8.3 and Appendix A, the reasons are
given for not including some companies’ products; please let CLEAPSS know of other omissions.
8.2 Information on the Data Sheets
Items are explained in the order in which they appear on the Data Sheet. The relevant Sections of
Building Bulletin 88 are given in brackets.
Date inspected
The date of the most-recent inspection is shown. Manufacturers have confirmed that the model
tested was still current at the time of preparation of these data sheets.
Price
Prices are given as a general indication. As these increase with time, customers are advised to
check, making sure that they are given the educational price and enquire if any discount is available to
1 Performance is strongly influenced by how the fume cupboard is installed and so some aspects cannot be covered here.
7CLEAPSS members and Associates. They should ask for a discount if several fume cupboards are
purchased. Usually, the ‘ex-works’ price is given; on top of this would be added a charge for del-
ivery and for VAT (in some schools, not reclaimable). In addition, for ducted cupboards, there will
be the considerable cost of installing the ducting, fan and flue, likely to be more than that of the
cupboard itself; total cost is what the purchaser should consider. Differences in the price of the fume
cupboard itself reflect many factors: inclusion of an under-bench cupboard, inclusion of a low air-
flow alarm, inclusion or absence of various services, the work surface material, different methods
of construction, pricing policy etc.
If schools are charged a special educational price for the filter, this is indicated. (There have been
instances of schools being quoted or charged the full commercial price.)
Overall dimensions
These are given as an indication of the space in the laboratory the fume cupboard will occupy.
‘Height with sash down’ for a fume cupboard is usually measured from the floor to the top of the
fume cupboard; it may need to be considered if the ceiling is low at the site. The dimensions of a
mobile, filter fume cupboard may need to be considered if access to science rooms is restricted, eg,
up stairs with a low ceiling. Some door frames may be too low to enable some mobile cupboards to
be pushed through.
Dimensions are satisfactory unless otherwise stated (BB88: 4.17 - 4.20). Duct exits of models
included are all satisfactorily positioned in the top of the fume cupboard (BB88: 4.21). Other
dimensions can usually be found from the drawings on the back of each data sheet.
Main features
Sides and back If a fume cupboard is to be used for demonstration, it should have glazed sides.
Sometimes a glazed back is useful (BB88: 3).
Baffle A back baffle helps reduce variation in face velocity but is not vital (BB88: 4.26).
Bypass A bypass prevents the face velocity increasing excessively as the sash is lowered; it is essen-
tial to reduce the risk of Bunsen-burner flames lifting off. See below (BB88: 4.23 - 4.25). Experience
has shown that, without an external bypass grill, it is unlikely that Building Bulletin 88 recom-
mendations will be met.
Working height stop (W’king ht stop) This limits the working position of the sash so that the opening
beneath it is 400 mm or a little more, helping an effective bypass to reduce excessive face velocities
as the sash is lowered. The stop can usually be released with a key etc to enable the sash to be
raised for cleaning or inserting tall apparatus (BB88: 4.15).
Lights A built-in light is necessary unless the fume cupboard is well illuminated by daylight and/
or room lights. On the models inspected, the lights were adequately sealed off from any gases
released in the fume cupboard (BB88: 4.33, 4.34).
Substructure included in the price above
This is self-explanatory. If a corrosive volatiles cupboard is fitted under a fume cupboard and, if its
ventilation depends on the fume cupboard being operated, the fume cupboard should be con-
trolled with a time switch, set so that the ventilation operates twice daily. Such a cupboard is
unlikely to meet the storage requirements for highly flammable liquids but is a good idea for
storing fuming liquids such as bromine, ethanoyl chloride etc.
Face velocity
Minimum value of the face velocity at working height (BB88: 4.5) For ducted fume cupboards, this will
be fixed by the installation. However, the values for filter-type fume cupboards are relevant.
Variation (BB88: 4.5, 4.7) This will depend to some extent on siting factors (BB88: 5). All that can be
said here is that those fume cupboards included, some of which were tested in schools, some on
manufacturer's premises, had variations below the BB88 figure of 30%.
Face velocity at working height and at 200 mm (BB88: 4.25) If the face velocity becomes too high, ie,
greater than 0.7 m s-1, it affects Bunsen-burner flames. These can be blown inwards and so heat less
efficiently; they can even blow out. Fume cupboards included in this guide have increases in face
velocity between the two sash settings of less than 50%. Do not be misled by some suppliers who
may imply that a faster air flow is safer. If Bunsen burners are to be used, this is not true.
8The main features of a fume cupboard
DUCT DUCT
DAMPER DAMPER
BYPASS BYPASS
BAFFLE
SASH SASH
Working
height
stop
FACE WORKING Working Cleaning
VELOCITY height height
APERTURE
Minimum height
WORK SURFACE
The sash
Comments are mostly self-explanatory. In the past, spring devices for counterbalancing sashes
have sometimes given trouble as the lubricant inside them dries up but some manufacturers claim
that modern designs are trouble free. Most fume cupboards inspected had counterweights, att-
ached by two cords; if either one breaks, the sash jams and does not descend, ie, it is ‘fail-safe’.
The filter
(Only for ‘mobile, filter’ fume cupboards; see section 5.)
Customers are strongly advised to ask for the general-purpose filters quoted in the ‘Model and/or
catalogue number’ box.
Filter efficiencies required
Substance % Examples of release rates of gas in fume Release Acceptable
efficiency cupboard (cm3 s-1) into room level of gas in
required for (cm3 s-1) room (ppm)1
safety
Ammonia 96.5 100 (preparation) 3.5 20
Bromine 98.5 2 (pouring) 0.03 0.2
Chlorine 99.0 12 (preparation) 0.1 0.6
Nitrogen dioxide 96.5 7 (preparation from copper 0.25 1.5
and concentrated nitric acid)
Sulfur dioxide 99.0 50 (opened sulfur dioxide 0.5 3
canister)
1,1,2-trichloro- 97.0 50 (boiling) 1.5 9
ethylene
Efficiency This is the ratio of the rate of absorption of contaminants by a filter to the rate of release
of the contaminant within the fume cupboard (BB88: 4.62). It is typically 97 - 99%. Recent tests by
CLEAPSS have shown that many filters supplied are inadequate.
Work surface included in the price
1 The calculation is based on a release for 30 minutes in a 250 m3 room with a ventilation rate of 2 changes of air per hour
(a low value).
9Unless otherwise stated, these were satisfactory (BB88: 4.28-4.30). ‘Solid epoxy’, eg, Durcon, is the
most chemical-resistant material but it is expensive. Also satisfactory and more commonly used is
‘solid-grade laminate’, which is of phenol-formaldehyde resin with a melamine top layer; eg,
Trespa. Dark colours and speckled finishes will partially conceal stains which are commonly brown
and orange.
Services and controls included in the price
Panel-mounted valves, with the valve just behind the panel, are preferred to the type in which a
control on the panel is connected by a rod to a valve below the outlet (BB88: 4.39 - 4.40). Now
almost all manufacturers fit them.
In some cases, the service outlets were rather far back (BB88: 4.37, 4.40) but this is not a serious bar
to purchase.
In the fume cupboards inspected, the controls, pipes and cables were sealed off from the cupboard
below unless otherwise stated (BB88 4.45).
Construction and finishes
Entries are self-explanatory. Many are ‘epoxy-coated’ which is satisfactory (BB88: 4.31). Many
standard finishes are light in colour and so will show stains. If there is choice, darker colours are
advised.
Comments
Design - self-explanatory.
Materials - self-explanatory.
Controls - self-explanatory.
Low face-velocity alarm - An electronic alarm is not essential but, if one is not fitted, the purchaser
should attach a strip of thin plastic sheet to the bottom of the sash to indicate that there is an
adequate face velocity.
Additional categories for filter fume cupboards
Fitting filters - self-explanatory.
14-monthly testing - included to stress the necessity of filter-saturation testing.
Manual and information printed on cupboard - important for safe use (BB88 4.72).
Installation
Unless otherwise stated, the companies for which ducted fume cupboards are considered will
design and install fume-cupboard extraction systems or find companies that will.
Drawings on the back of each data sheet
These and any accompanying text are based on material from the manufacturer.
8.3 Companies omitted
Companies and their products may be omitted from this guide because:
• they did not respond to the request for information;
• they do not sell a fume cupboard in the price ranges usually considered for schools;
• their school fume cupboards, in the opinion of CLEAPSS, do not adequately meet Building
Bulletin 88 recommendations;
• CLEAPSS was unaware that they sold suitable fume cupboards. We are always pleased to
hear of other companies with products which appear suitable.
See Appendix A for companies and products omitted from this guide for the first three reasons
above. Some companies listed in previous editions of this guide no longer manufacture fume cup-
boards. However, some established manufacturers have been removed because their products are
now less satisfactory than they were, eg, as a result of changes to the fume cupboard’s design
which adversely affected performance.
CLEAPSS will be testing fume cupboards on an on-going basis. Therefore, if you have had this
guide for some time (or are consulting it on the Science Publications CD-ROM several months after
the CD was produced in the autumn term), the list of excluded companies and fume cupboards
may have changed. Please check the members-only part of the CLEAPSS web site for more recent
data sheets.
108.4 FIXED, DUCTED
APMG Ltd Model and/or © CLEAPSS 08.04
catalogue number
SEE THE REVERSE FOR DRAWINGS
Airform Schools 1000
£1425 ex works (including service controls
Inspected 12.00 at works. but excluding the cost of delivery, the fan,
ducting, flue, connection of services etc
and VAT).
Overall dimensions Main features Substructures included in the price
(Other dimensions on back) above
Sides: glazed
Width: 1000 mm Back: Under-bench cupboard, or
glazed
(Other widths available) Epoxy-coated mild-steel frame
Depth: 700 mm Baffle: fitted
Bypass: fitted
Height with sash down: 2145 mm
W’king spring-
ht stop: loaded bolt
Light: 600 mm 18 W
fluorescent tube
Face velocity
Sash opening Variation at working height: 9% Satisfactory: well below 30 %.
Working height: 400 mm Face velocity:
at working height: 0.54 m s-1
Minimum height: 50 mm at 200 mm: 0.54 m s-1
Increase: 0% Very good
Cleaning height: 550 mm
Work surface included in the price Services and controls included in the price
Black laboratory-grade laminate with a lip in front. Other 1 water outlet } with controls of
colours on request. 1 gas outlet } panel-mounted type
1 drip cup of vulcathene
1 double electric socket, with 30 mA RCD
1 light switch
Construction and finishes Sash is of 5 mm toughened glass, sliding
in PVC channels.
The frame, fascia and bypass grill are of aluminium, finished in ivory-coloured
epoxy. The back and ceiling are of solid-grade laminate. The baffle and side Sash mechanism is a counterweight with
panels are of 5 mm toughened glass. Kevlar cables, fail-safe.
Comments
Design -
Materials -
Controls Well protected by overhanging work surface.
Low face-velocity alarm Available as an extra. Purchaser should attach a strip of plastic ribbon to the bottom of the sash.
For further information, contact the firm Installation
(see Appendix C) or the CLEAPSS
School Science Service (see address The company will install.
below). It will also repair and upgrade fume cupboards and their ventilation systems.
R9a / Fume Cupboard Data Sheet © CLEAPSS ® School Science Service, Brunel University, Uxbridge UB8 3PH
August 04 Tel: 01895 251496; Fax: 01895 814372; E-mail: science@cleapss.org.uk; Web site: www.cleapss.org.ukR9a / Fume Cupboard Data Sheet © CLEAPSS ® School Science Service, Brunel University, Uxbridge UB8 3PH August 04 Tel: 01895 251496; Fax: 01895 814372; E-mail: science@cleapss.org.uk; Web site: www.cleapss.org.uk
8.4 FIXED, DUCTED
Associated Joinery Techniques Model and/or © CLEAPSS 08.04
catalogue number
SEE THE REVERSE FOR DRAWINGS
Educational fume cupboard
£1600 ex works (including service controls
Inspected 05.04 but excluding the cost of delivery, the fan,
ducting, flue, connection of services etc).
Overall dimensions Main features Substructures included in the price
(Other dimensions on back) above
Sides: glazed vision panels
Width: 1000 mm Back: Double sink under-bench cupboard
not glazed
(Other widths available) Others available:
Baffle: fitted
Depth: 770 mm Bypass: –
fitted
Height with sash down: 2075 mm W'king released by keys
ht stops:
Lights: one 600 mm 40 W
fluorescent tube
Face velocity
Sash opening Variation at working height: 11 % Satisfactory; well below 30 %.
Working height: 400 mm Face velocity:
Minimum height: 50 mm at working height: 0.75 m s-1
at 200 mm: 1.10 m s-1
Cleaning height: 720 mm Increase: 46 % Just acceptable as below 50 %.
Work surface included in the price Services and controls included in the price
Off-white solid-core laminate with a raised rim all round. 1 water outlet } with controls of the panel-
1 gas outlet } mounted valve type.
1 drip cup of vulcathene
1 double electric socket with indicators
1 light switch
Construction and finishes Sash is of 6 mm toughened glass with
bottom lip/handle of solid grade laminate,
The carcase is of 18 mm medium-density fibre with a melamine surface; the sliding in channels cut into the carcase.
baffle and the back and top panels of 4 mm solid grade laminate. Vision Sash mechanism is counterweights with
panels, 540 x 400 mm, in the sides are glazed with 6 mm toughened glass. stainless-steel cables, fail-safe.
Comments
Design -
Materials Clients should ask for a work surface of a darker colour so that stains will be less apparent.
Controls -
Low face-velocity alarm -
For further information, contact the firm Installation
(see Appendix C) or the CLEAPSS School
Science Service (see address below). The company will install.
It will also repair and upgrade fume cupboards and their ventilation systems.
R9a / Fume Cupboard Data Sheet © CLEAPSS ® School Science Service, Brunel University, Uxbridge UB8 3PH
August 04 Tel: 01895 251496; Fax: 01895 814372; E-mail: science@cleapss.org.uk; Web site: www.cleapss.org.ukNo drawing is available. R9a / Fume Cupboard Data Sheet © CLEAPSS ® School Science Service, Brunel University, Uxbridge UB8 3PH August 04 Tel: 01895 251496; Fax: 01895 814372; E-mail: science@cleapss.org.uk; Web site: www.cleapss.org.uk
8.4 FIXED, DUCTED A mobile version, for ventilation through a flexible duct, is available; see section 8.6.
Associated Laboratory Services Ltd Model and/or © CLEAPSS 08.04
catalogue number
SEE THE REVERSE FOR DRAWINGS
Also sold by:
Lab-Vent 1000
Diamik
£1300 ex works (including service controls
Inspected 12.00 at works. but excluding the cost of delivery, the fan,
ducting, flue, connection of services etc).
Overall dimensions Main features Substructures included in the price
(Other dimensions on back) above
Sides: glazed
Width: 1000 mm Back: None.
not glazed
(Other widths available) Available are:
Depth: 710 mm Baffle: fitted
under-bench cupboard;
Bypass: fitted
Height with sash down: 1610 mm square-section, tubular frame, epoxy-
W'king screws released coated.
ht stop: with Allen key
Light: one 600 mm 20 W
fluorescent tube
Face velocity
Sash opening Variation at working height: 20 % Acceptable but slightly high,
probably due to awkward site of
Working height: 400 mm Face velocity: model tested.
at working height: 0.53 m s-1
Minimum height: 50 mm at 200 mm: 0.65 m s-1
Increase: 22 % Very satisfactory; well below
Cleaning height: 630 mm 50 %.
Work surface included in the price Services and controls included in the price
Trespa, speckled finish, colours to customer’s choice, with a 1 water outlet } with controls of the panel-
lip in front. 1 gas outlet } mounted valve type
1 drip cup of vulcathene
1 double electric socket
1 light switch
Construction and finishes Sash is of 6 mm toughened glass, sliding
in epoxy-coated aluminium channels.
The frame is of epoxy-coated mild steel. The ceiling and fascia are of PVC,
the latter fitted with an epoxy-coated, mild-steel, bypass grill. The rear panel Sash mechanism is a counterweight with
and baffle are of Trespa and the sides are glazed with 6 mm toughened glass. stainless-steel cables, fail-safe.
Comments
Design -
Materials -
Controls -
Low face-velocity alarm None fitted. Purchaser should attach a strip of plastic ribbon to the bottom of the sash.
For further information, contact the firm Installation
(see Appendix C) or the CLEAPSS
School Science Service (see address The company will install.
below). It will also repair and upgrade fume cupboards and their ventilation systems.
R9a / Fume Cupboard Data Sheet © CLEAPSS ® School Science Service, Brunel University, Uxbridge UB8 3PH
August 04 Tel: 01895 251496; Fax: 01895 814372; E-mail: science@cleapss.org.uk; Web site: www.cleapss.org.ukR9a / Fume Cupboard Data Sheet © CLEAPSS ® School Science Service, Brunel University, Uxbridge UB8 3PH August 04 Tel: 01895 251496; Fax: 01895 814372; E-mail: science@cleapss.org.uk; Web site: www.cleapss.org.uk
8.4 FIXED, DUCTED A mobile version, for ventilation through a flexible duct, is available; see section 8.6.
Clean Air Ltd Model and/or © CLEAPSS 08.04
catalogue number
Also sold by: SEE THE REVERSE FOR DRAWINGS
ESA McIntosh Educational Fume Cupboard
Fixed Clean Air £1395 ex works
ESA McIntosh £2097 ex works
Inspected 2001 (including service controls and outlets but
excluding the cost of delivery, the fan,
ducting, flue, bringing services to the site
and connection etc).
Overall dimensions Main features Substructures included in the price
(Other dimensions on back) above
Sides: glazed
Width: 1000 mm Back: Epoxy-coated, mild-steel cupboard,
glazed or unglazed lockable.
(Other widths available)
Depth: 700 mm Baffle: fitted Also available are:
Bypass: fitted shelves to fit standard cupboard;
Height with sash down: 2100 mm
W'king released with a vented acid cupboard;
ht stop: pull button
support frame
Light: two 600 mm 20 W
fluorescent tubes
Face velocity
Sash opening Variation at working height: 6% Satisfactory; well below 30 %.
Working height: 400 mm Face velocity:
at working height: 0.57 m s-1
Minimum height: 50 mm at 200 mm: 0.65 m s-1
Increase: 39 % Satisfactory. Manufacturer has
Cleaning height: 700 mm now improved the bypass and
claims to have reduced this
figure to 20 %.
Work surface included in the price Services and controls included in the price
Glass fibre-reinforced resin, white, grey or black, on a wooden 1 water outlet } with controls of the panel-
base or speckled Trespa, both with a deep lip. Durcon solid- 1 gas outlet } mounted valve type
cast epoxy resin as an optional extra. 1 drip cup of vulcathene
1 double electric socket with indicators
1 light switch
Construction and finishes Sash is of 6 mm toughened glass in PVC
channels, its bottom is an aluminium
The frame and ceiling are finished in epoxy over zinc-coated mild steel. extrusion aerofoil, finished in epoxy.
The rear panel and baffle are of white PVC and the sides are glazed with Sash mechanism is a counterweight with
6 mm toughened glass. stainless-steel cables, fail-safe.
Comments
Design -
Materials -
Controls -
Low face-velocity alarm An airflow control panel is now included in the price. It incorporates lights to indicate whether
the air flow is safe or has fallen to an unsafe level.
For further information, contact the firm Installation
(see Appendix C) or the CLEAPSS School
Science Service (see address below). The company will install.
It will also repair and upgrade fume cupboards and their ventilation systems.
R9a / Fume Cupboard Data Sheet © CLEAPSS ® School Science Service, Brunel University, Uxbridge UB8 3PH
August 04 Tel: 01895 251496; Fax: 01895 814372; E-mail: science@cleapss.org.uk; Web site: www.cleapss.org.ukR9a / Fume Cupboard Data Sheet © CLEAPSS ® School Science Service, Brunel University, Uxbridge UB8 3PH August 04 Tel: 01895 251496; Fax: 01895 814372; E-mail: science@cleapss.org.uk; Web site: www.cleapss.org.uk
8.4 FIXED, DUCTED A mobile version, for ventilation through a flexible duct, is available; see section 8.6.
Fume Cupboard Design Ltd Model and/or © CLEAPSS 08.04
catalogue number
SEE THE REVERSE FOR DRAWINGS
Fumex F1000
Inspected 05.04 £1287 ex works (including service controls
and outlets but excluding the cost of
delivery, the fan, ducting, flue, bringing
services to the site and connection etc).
Overall dimensions Main features Substructures included in the price
(Other dimensions on back) above
Sides: glazed
Width 1000 mm double storage cupboard
(other widths available) Back: not glazed
Also available is:
Baffle: fitted
Depth: 730 mm double storage cupboard ventilated
Bypass: fitted
Height with sash down: 2090 mm W'king key-lockable push-
ht stop: button
Lights: two 600 mm 20 W
fluorescent tubes
Face velocity
Sash opening Variation at workng height: 7% Satisfactory; well below 30 %.
Working height: 400 mm Face velocity:
Minimum height (under sill): 50 mm at working height: 0.43 m s-1
at 200 mm: 0.56 m s-1
Cleaning height: 655 mm Increase: 31 % Satisfactory; well below 50 %.
Work surface included in the price Services and controls included in the price
Solid grade Trespa with spillage lip. Dished epoxy available 1 water outlet } with controls of the panel-
as an extra. 1 gas outlet } mounted valve type
1 drip cup of vulcathene (or small sink if in a prep room)
1 double electric socket with indicators
1 light switch
Construction and finishes Sash is of 6 mm toughened glass, sliding
in polythene channels. It has a shaped
The frame is of epoxy-coated, mild steel and the side panels are of 6 mm bottom edge.
toughened glass. The back and baffle are of solid-grade laminate or tough-
ened glass. The fascia is of Trespa with the bypass opening covered with a Sash mechanism is a counterweight with
light stainless-steel mesh. stainless-steel cables, fail-safe.
Comments
Design -
Materials -
Controls -
Low face-velocity alarm Can be fitted for £90 - 180, depending on sophistication. Otherwise, purchaser should attach a
strip of plastic ribbon to the bottom of the sash.
For further information, contact the firm Installation
(see Appendix C) or the CLEAPSS School
Science Service (see address below). The company will install.
It will also repair and upgrade fume cupboards and their ventilation systems.
R9a / Fume Cupboard Data Sheet © CLEAPSS ® School Science Service, Brunel University, Uxbridge UB8 3PH
August 04 Tel: 01895 251496; Fax: 01895 814372; E-mail: science@cleapss.org.uk; Web site: www.cleapss.org.ukR9a / Fume Cupboard Data Sheet © CLEAPSS ® School Science Service, Brunel University, Uxbridge UB8 3PH August 04 Tel: 01895 251496; Fax: 01895 814372; E-mail: science@cleapss.org.uk; Web site: www.cleapss.org.uk
8.4 FIXED, DUCTED A mobile version, for ventilation through a flexible duct, is available; see section 8.6.
Fume Cupboard Design Ltd Model and/or © CLEAPSS 08.04
catalogue number
SEE THE REVERSE FOR DRAWINGS
FHS/10
Inspected in mid nineties. £1297 ex works (including service controls
and outlets but excluding the cost of
delivery, the fan, ducting, flue, bringing
services to the site and connection etc).
Overall dimensions Main features Substructures included in the price
(Other dimensions on back) above
Sides: glazed
Width 1000 mm Epoxy-coated, tubular steel frame.
(also 1200 and 1500 mm) Back: not glazed
Others available:
Baffle: fitted
Depth: 775 mm under-bench cupboard;
Bypass: fitted highly flammable liquids cupboard,
Height with sash down: 2100 mm W'king that can be pushed under the frame.
ht stop: key-operated
Lights: two 600 mm 20 W
fluorescent tubes
Face velocity
Sash opening Variation at workng height: 7% Satisfactory; well below 30 %.
Working height: 400 mm Face velocity:
Minimum height (under sill): 25 mm at working height: 0.45 m s-1
at 200 mm: 0.65 m s-1
Cleaning height: 720 mm Increase: 44 % (A further design change by the
supplier is reported to lower the
increase to 26 %, very satisfac-
tory.)
Work surface included in the price Services and controls included in the price
Black Trespa fitted with a front lip. (Epoxy also but price then 1 water outlet } with controls of the panel-
£1450.) 1 gas outlet } mounted valve type
1 drip cup of vulcathene (or small sink if in a prep room)
1 double electric socket with indicators
1 light switch
Construction and finishes Sash is of 6 mm toughened glass, sliding
in polythene channels.
The frame is of epoxy-coated, mild steel and the side panels are of 6 mm
toughened glass. The back and baffle are of solid-grade laminate or tough- Sash mechanism is a counterweight with
ened glass. stainless-steel cables, fail-safe.
Comments
Design -
Materials -
Controls -
Low face-velocity alarm Can be fitted for £90 - 180, depending on sophistication. Otherwise, purchaser should attach a
strip of plastic ribbon to the bottom of the sash.
For further information, contact the firm Installation
(see Appendix C) or the CLEAPSS School
Science Service (see address below). The company will install.
It will also repair and upgrade fume cupboards and their ventilation systems.
R9a / Fume Cupboard Data Sheet © CLEAPSS ® School Science Service, Brunel University, Uxbridge UB8 3PH
August 04 Tel: 01895 251496; Fax: 01895 814372; E-mail: science@cleapss.org.uk; Web site: www.cleapss.org.ukR9a / Fume Cupboard Data Sheet © CLEAPSS ® School Science Service, Brunel University, Uxbridge UB8 3PH August 04 Tel: 01895 251496; Fax: 01895 814372; E-mail: science@cleapss.org.uk; Web site: www.cleapss.org.uk
8.4 FIXED, DUCTED A mobile version, for ventilation through a flexible duct, is available; see section 8.6.
Fumetec Ltd Model and/or © CLEAPSS 08.04
catalogue number
SEE THE REVERSE FOR DRAWINGS
College Fume Cupboard
£1298 ex works (including service controls
Inspected 10.03 and outlets but excluding the cost of
delivery, the fan, ducting, flue, bringing
services to the site and connection etc).
Overall dimensions Main features Substructures included in the price
(Other dimensions on back) above
Sides: glazed
Width: 1000 mm Back: Tubular mild steel frame, epoxy coated
not glazed
(Other widths available) Others available:
Baffle: fitted
Depth: 750 mm Bypass: fitted Under-bench storage cabinets in
timber/mild steel, vented if required.
Height with sash down: 2100 mm W'king released by turning
ht stop: key
Lights: two 600 mm 40 W
fluorescent tubes
Face velocity
Sash opening Variation at working height: 10 % Satisfactory: below 30 %.
Working height: 400 mm Face velocity:
Minimum height: 30 mm at working height: 0.48 m s-1
at 200 mm: 0.63 m s-1
Cleaning height: 680 mm Increase: 30 % Satisfactory: below 50 %.
Work surface included in the price Services and controls included in the price
Black, solid-core laminate with a metal lip all round, epoxy- 1 water outlet } with controls of the panel-
coated, sealed all round. Also available: black epoxy, PVC 1 gas outlet } mounted valve type.
etc. 1 drip cup of vulcathene
1 double electric socket with indicators
1 light switch
Construction and finishes Sash is of 6 mm toughened glass. Sash
mechanism is a counterweight with
The frame is of zinc-coated mild-steel sheet, finished in grey and blue epoxy, stainless-steel cables, fail-safe.
the baffle and the front, back and top panels of 6 mm solid-grade laminate,
PVC or polypropylene. Sides are glazed with 6 mm toughened glass.
Comments
Design -
Materials -
Controls -
Low face-velocity alarm Approximately £250 optional extra. Otherwise, purchaser should attach a strip of plastic ribbon
to the bottom of the sash.
For further information, contact the firm Installation
(see Appendix C) or the CLEAPSS School
Science Service (see address below). The company will install.
It will also repair and upgrade fume cupboards and their ventilation systems.
R9a / Fume Cupboard Data Sheet © CLEAPSS ® School Science Service, Brunel University, Uxbridge UB8 3PH
August 04 Tel: 01895 251496; Fax: 01895 814372; E-mail: science@cleapss.org.uk; Web site: www.cleapss.org.ukYou can also read
