Around the industry:Layout 1 22/5/09 09:49 Page 31
A R O U N D T H E I N D U S T R Y
ADVERTORIAL ADVERTORIAL
ENERGY PERFORMANCE RATES KERAFLO COPES WITH
PASSIVENT
Minimising energy consumption and carbon
WATER NEEDS
emissions in commercial, industrial and public
buildings is being achieved through new
The Westfield London Shopping Centre,
developments from Passivent Ltd, the UK’s
situated between Shepherds Bush and Notting
leading supplier of natural ventilation systems.
Hill, is as trendy as its location. With 256 shops
from 15 countries in the Westfield Centre
Passivent commercial natural ventilation systems
providing a mix of top of the range high street
are proven in real life to be one of the strategies
names and a plethora of designer labels, all set
to attain up to an A rating under the new Energy
in an area dominated by the very latest and
Performance Certificate. Their performance
most glamorous interior design and decoration,
enables their qualification for credits under the
it promises to be the fashion centre for London.
BREEAM verification system (often helping
buildings to achieve at least a ‘very good’ rating)
The visitor is entitled to be dazzled by the
and towards achievement of Building Regulations Approved Document L (Conservation of Fuel
opulence of the displays but they will probably
& Power). Further, they reduce energy consumption over air conditioned buildings by up to 50%,
not see past the fashion to consider the
yield 15% savings on capital costs, 75% savings on maintenance costs, and eliminate the need
problems of cold water supply to such a complex of shops. That was the remit of Silcock Dawson
for a separate plant room: in one installation the Passivent system is being calculated at
& Partners as part of their Mechanical Services Design duties and the cold water distribution
reducing energy demand by up to 80%.
system they produced relied heavily on the control of the innovative float valves developed and
The savings are achieved by harnessing the physics of natural air movement, of pressure and
manufactured by Keraflo Ltd.
temperature, similar to how a chimney functions. Warm internal air rises naturally; higher Silcock Dawson’s design involved two main storage cisterns each with its own valve selection;
external air pressure moving across the roof draws the used internal air out of the building one providing the domestic cold water supply to the centre, the other serving the adiabatic cold
through strategically placed terminals. The only electricity consumption is to occasionally water distribution system. The main storage arrangement consists of two huge sectional cisterns
attenuate louvres to control inlets and extracts, and using the control systems which enable mounted in ‘piggy-back’ style so that the upper tank replenishes the lower and ensures that good
precise adjustment depending on temperature, air quality and CO2 levels depending on circulation is maintained at all times.
application.
A Keraflo KP Valve, selected to provide truly rapid fill at peak times, is controlled by a KB Pilot
As the forces driving the system are naturally present, the Passivent system functions 24/7. This
Float Valve arrangement and feeds the upper tank – 7000 x 4500 x 2500mm - using a dual flow
also provides effective night cooling as internal and external temperatures have a higher
system. The water supply piped down into the second cistern – equally vast at 6000 x 4500 x
variance at night, increasing convection and removal of surplus heat gain within the building,
4000mm - is regulated by a dual feed Keraflo KB Float Valve. In each case the KB Valve was
minimising energy consumption to bring the building down to the required temperature, helping
chosen because they perform excellently on a low operational pressure. The adiabatic storage
ensure a pleasant, fresh environment within the next day and reducing incidence of sick building
cistern, this one a mere 3000 x 2000 x 2000mm in dimension, uses a standard KB float valve
syndrome. Research shows people’s performance-be it worker output, student learning or
arrangement.
patient recovery- is improved in naturally ventilated buildings.
So when those who visit Westfield London require water to freshen up and repair the retail
Passivent is a founder member of the NatVent EC-EU-funded project co-ordinated by the
ravages, it will be provided courtesy of an ingenious system of vast cisterns whose flow is
Building Research Establishment to develop practical natural ventilation solutions for the
impeccably regulated by Keraflo Float valves.
commercial sector, and is developing smart solutions to promote adoption of natural ventilation.
KERAFLO LTD
PASSIVENT LTD Unit 1 Woodley Park Estate, 59-69 Reading Road
North Frith Oasts, Ashes Lane, Hadlow TN11 9QU
Woodley, Reading, Berks RG5 3AN
Tel: 01732 850770
Tel: 0118 921 9920
Email: info@passivent.com
Email: info@keraflo.co.uk
Web: www.passivent.com
Web: www.keraflo.co.uk
Reader Reply No 28 Reader Reply No 29
ADVERTORIAL
ADVERTORIAL
STRICTLY FOR THE GIRLS COSY KIDS
Abbots Bromley School for Girls is a thriving private boarding and day school with around 300
students aged between 4 and 18. It has a
As part of a Government funded replacement programme for capital works in schools, Remeha
reputation for excellence aimed at
products are proving a popular choice when up-dating boilers in educational establishments in
ensuring every girl achieves her full
the Leeds area.
potential both academically and socially, In the beautiful rural area of Shadwell, North West of Leeds, Shadwell Primary School is
and offers a curriculum covering a wide delighted with the renewal of their entire heating system fuelled by two Remeha Quinta 85 skid-
range of subjects. mounted boilers with
The prestigious school includes some of
bespoke control panel.
the finest education and sports facilities in In Otley All Saints, the
the area, including new science birthplace of Chippendale,
laboratories, dance studios, music rooms, the smooth installation of
a chapel, Astroturf sports pitch, athletics another custom designed
track, racket sports centre, swimming pool system incorporating two
and an equestrian centre. skid-mounted boilers, one
The school equally pays particular attention to environmental issues and has recently completed
Remeha Quinta 65 and
the installation of a new Buderus solar thermal panel system to provide energy efficient heating
one Remeha Quinta 85,
for its swimming pool complex. This new system replaces an existing 30 year old solar system
has also successfully
which was one of the earliest larger scale, commercial solar panel installations in the country,
taken place at the village
installed at a time when using solar for power generation was in its commercial infancy. However
primary school.
the old system had become outdated and inefficient and had suffered panel damage and Both installations were
pipework deterioration over the years. carried out by Contractor,
It was recognised that a new, modern solar system was needed to provide the necessary heat
Sayes & Co Ltd of Leeds,
for the swimming pool and the hot water needs of associated showers and washbasins.
who have an outstanding
Swimming is an important area of school activities and the all year round use of pool facilities is
reputation in the area and
vital in maintaining the strength of the school’s swimming teams which compete in national
frequently use Remeha
events.
products. The contractor
chose Remeha boilers, mainly because of their efficiency and reliability.
Vale Heating & Plumbing of Pershore specified 32 solar panels in 2 fields, each of 16 panels.
They chose Buderus solar panels for their build quality, their high energy yields and because
Remeha’s skid-mounted concept simplifies installation and reduces down-time. Built on a rigid
they are designed especially for large-scale commercial applications. A high performance range
boxed frame, the Quinta series boilers are only 650mm wide allowing them to be easily rolled
of Buderus pump stations and accessories allow for individual fields of between 10 and 50 solar
into position through any standard doorway. Similarly the pipe work is pre-assembled to ensure
panels to be installed. Multiple fields of panels, and split systems are also possible for bigger
ease of transportation and installation. As with all Remeha boilers, the ultra-low Nox emissions
commercial installations.
and low noise operation are perfect in all locations where a warm, safe and quiet atmosphere is
essential.
The flat plate SKS 4.0 collectors have been installed using the Buderus in-roof mounting system
providing an unobtrusive and stylish finish in keeping with the rest of the building.
REMEHA
BUDERUS Broag Limited, Remeha House, Molly Millars Lane,
Cotswold Way, Warndon, Worcester WR4 9SW
Wokingham, Berkshire, RG41 2QP
Tel: 01905 752936
Tel: 0118 978 3434
Email: general.buderus@uk.bosch.com
Email: boilers@broag-remeha.com
Web: www.buderus.co.uk
Web: www.remeha.co.uk
Reader Reply No 30 Reader Reply No 31
VISIT OUR WEBSITE: www.bsee.co.uk
JUNE 2009 BUILDING SERVICES & ENVIRONMENTAL ENGINEER 31
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