1. Customer Endorsements
Institution of Mechanical Engineers
We initially asked Sabien to pilot the M2Gs and demonstrate the savings that would be achieved and,
following the success of the trial, the units are now playing an important role in minimising our energy
consumption. We were also very pleased with the support we received from Sabien, which ensured that
the project ran smoothly,”
Brian Robinson, Head of Energy
AEA Technology
AEA were commissioned to monitor and verify an in-situ pilot of Sabien technology‟s M2G boiler load
optimiser. The pilot was conducted across 3 sites occupied by BT over a period of 4 months. AEA
reviewed the installation of the M2Gs, monitored the pilot process, visited the sites for data collection and
carried out independent analysis of the collated data and verified the savings.
Based on the results of the pilot AEA recommended a business case to be made for a large scale order of
M2G as it was clear from the pilot substantial cost and carbon savings could be achieved.
AVIVA
AVIVA has a well established CSR Policy, and is committed to reducing its impact on the environment. As
part of this, Norwich Union sets targets each year to reduce its carbon footprint. The reductions achieved
by M2G in a wide range of organisations were impressive and we wanted to confirm these ourselves with
a pilot scheme managed by Sabien at a number of our sites. Sabien were open and easy to work with,
and together with the impressive savings achieved made a strong case to adopt M2G across the Norwich
Union estate” Gregory Luxford, Energy & Utilities Manager
Royal Bank of Scotland
“M2G is a key component in the group‟s energy efficiency strategy and the installation of M2G units
throughout our UK fleet of buildings played a major role in helping the bank deliver on its commitment to
reducing its energy consumption and harmful carbon emissions. Sabien and M2G delivered”
Graham Jennings , Group Energy Manager
Communities and Local Government
“Now that we have validated data following the success of the first three installations we are
recommending the M2G to the various agencies and non-governmental bodies that fall within the remit of
CLG”
Carl von Reibnitz, Sustainable Operations Manager
Serco
“We were particularly impressed with the results because the pilot took place during the coldest weather
we‟ve had in 30 years, when dry cycling would have been at a minimum, It„s clear that significantly higher
savings will be achieved during more temperate conditions and our ongoing monitoring already supports
that view. Many people think BEMS can control every aspect of a boiler‟s operation but this is not the
case. The M2G interfaced very smoothly with our BEMS and the two now complement each other to
maximise energy savings”
Alan Taylor, Technical Manager, Government Integrated Services
www.sabien-tech.co.uk

2. Balfour Beatty
"We have formed a strategic partnership with Sabien Technology as part of our ongoing commitment to
delivering cost effective carbon saving solutions for our customers. We recognise their product as a way
of driving down carbon emissions from the operation of buildings."
Tim Ward, Director Business & Industry
O2
“We have been very impressed with the performance of the M2G units. They have lived up to all
expectations and because they are so easy to fit, there was no interruption in service to the two trial
buildings. We are now rolling out M2G to other corporate offices in our portfolio and look forward to seeing
significantly reduced gas bills.”
Paul Eggleton, Energy Manager
University of Derby
“Trying to find ways of saving energy and carbon emissions is a large part of my job and for the cost
involved in installing M2G with the resulting short payback, there really was no alternative. We are able to
compare the efficiency savings between those with M2G and those without. This has confirmed that M2G
has reduced the university‟s carbon emissions”
Anne Downes, Energy Officer
Jones Lang LaSalle
“The energy savings that the M2G can deliver have been fully validated so we now have complete
confidence in recommending it to our customers.”
“The BMS at the site in Swindon is very sophisticated and it would have been technically possible to have
a special program written to control the dry cycling, but it was more time-effective to use an off-the-shelf
product, which has potential to integrate fully with existing BMS, particularly when contemplating new
programming requirements”. “In contrast, the site in Basingstoke, the BMS was simpler and, in fact, even
with already well-optimised boiler sequencing, achieving even further savings with this system is very
impressive”.
“Sabien responded quickly once we got the go-ahead for the pilot from the client and proved to be very
flexible in accommodating our requirements. We will now be working in partnership with Sabien and our
maintenance contractor as we look to try and roll-out M2G across other candidate sites.”
Mark Bottriell, Jones Lang LaSalle’s Portfolio Energy Manager for Europe, Middle East and Africa
Land Registry
“The introduction of this technology has demonstrated our commitment to reduce Carbon emissions. We
are extremely pleased with the results and are looking to introduce the Sabien M2G technology in to as
many of our buildings as possible over the next few years.”
Martin Illingworth, National Environment Manager
International Students House
“We renewed the boiler plant and BMS in 2006 and extended the BMS in 2007 to optimise energy
efficiency even further,” explained ISH Chief Operating Officer David Chapman. “I had previously thought
that the BMS would also control dry cycling but this was not the case, as the extra savings achieved by
the M2G units have proved.”
“The performance of the M2Gs was assessed during the very cold weather at the beginning of 2010, so
we are impressed with the reduced gas consumption under these conditions and can reasonably expect
greater savings in future years. The project was also implemented very efficiently by the Sabien team”.
David Chapman, Chief Operating Officer
www.sabien-tech.co.uk

3. CASE STUDY: Institution of Mechanical Engineers
IMechE reduces gas consumption and
carbon emissions by 17%
The Institution of Mechanical Engineers (IMechE) the United Kingdom's qualifying body for
Mechanical Engineers has reduced the gas consumption by 17% using Sabien’s M2G.
Payback under 3 years
Installation of Sabien Technology’s M2G intelligent boiler a second stage firing. The result is a substantial fuel
load optimisers at the headquarters of the Institution of reduction during less demanding situations while
Mechanical Engineers (IMechE) the United Kingdom's ensuring maximum capacity during heavy load periods.
qualifying body for Mechanical Engineers has reduced the
gas consumption for heating and hot water by 17%, over and Project Management
above the savings achieved by the recently optimised “We were very pleased with the results of the pilot and
building management system (BMS). This is equivalent to a the ongoing energy and emissions savings that will be
reduction in carbon emissions of 25 tonnes per annum – with achieved for the Institution. We were also very pleased
a payback of around 2.7 years. with the support we received from Sabien, which
ensured that the project ran smoothly,” Brian Robinson
“The Institution is very focused on the energy consumption concluded.
of its buildings and we have reduced our carbon emissions
by over 25% in the last two years,” explained Head of “The IMechE project has again demonstrated the
Energy Brian Robinson. “We initially asked Sabien to pilot significant savings which can be achieved by M2G,”
the M2Gs and demonstrate the savings that would be commented Sabien’s CEO Alan O’Brien. “We work
achieved and, following the success of the trial, the units are closely with mechanical engineers during the installation
now playing an important role in minimising our energy of our technology, so having delivered these results to
consumption,” he added. their qualifying Institution further reinforces the merits of
M2G that they see in the field. The combination of
After a number of efficiency improvements had been made volatile energy prices and ever-stricter energy legislation
to the six boilers and existing controls, the M2G units were is putting increasing pressure on organisations to
then retro-fitted to each of the six boilers and placed in improve their energy efficiency. The valuable
measurement mode – to enable actual savings to be contribution made by M2G towards achieving these
recorded. objectives has now been proven in a wide range of
applications under very diverse conditions.”
What is M2G?
The M2G is an intelligent boiler load optimisation controller
that improves the efficiency of each individual boiler. A unit
which can be retro-fitted to each boiler monitors the
temperature of the water in the flow and return every 10
seconds and the information is recorded with heat transfer
rates at the first and second stage firings.
When a loading demand is made the system, automatically
checks the latest data it has stored and decides whether it is
more economical to retain first stage firing or to introduce
For more information please visit
sabien-tech.co.uk
or call us
0800 082 18 18

4. BT begins rolling out M2G
BT one of the world’s leading providers of communications solutions and
services has commenced the rollout of Sabien’s M2G boiler load optimiser
following extensive pilots. M2G will be installed, in a rolling program, to all
suitable buildings within BT’s estate of 7,500 buildings.
Jeff Nash, Head of Sustainable Estates, BT noted; “BT has a clear focus to
reduce its energy consumption and hence its CO2 emissions. It has plans
to reduce its emissions by 80% by 2016 in the UK. To help it achieve this
target it requires innovative solutions from suppliers to help save energy
and Sabien delivered on our expectations and will have a continuing role
to play in supporting BT in these plans”
Sabien worked closely with Monteray BT’s FM provider during the rollout,
providing end to end project management and installation across the UK.
How does M2G deliver CO2 savings?
The M2G is an intelligent boiler load optimiser which improves the
efficiency of each individual boiler regardless of age and size by removing
“dry cycling”, an inherent problem found in over 80% of commercial
boilers.
M2G is retro-fitted to each boiler and monitors the temperature of the
water in the flow and return every 10 seconds, enabling the M2G to
analyse the temperature losses from the boiler. The M2G calculates “M2G’s ability to integrate with existing
whether the temperature loss is caused by a genuine heating demand or
from standing losses i.e. temperature losses through the boiler casing and
Building Management Systems and the
flue. When the boiler tries to fire as a consequence of the standing losses vast range of single and multiple boiler
the M2G will prevent the boiler from firing resulting in reduced energy applications regardless of size and age
consumption. within the BT estate is a significant
benefit”
M2G’s ability to remove dry cycling within each boiler results in no
changes to the boiler’s designed set points or impacts to ambient room Jeff Nash
temperatures. This approach eradicates previous control methods of using Head of Sustainable Estates
fixed time delays or predictive firing patterns.
M2G complements and integrates with existing building controls by
identifying any changes to the boilers set point from building management
systems or additional controls such as weather compensation.
For more information please visit
sabien-tech.co.uk
or call us
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5. RAF Odiham reduces energy consumption
by 15% with M2G
RAF Odiham has reduced its gas consumption and CO2 emissions by 15% by installing
Sabien’s patented M2G
Royal Air Force Odiham is based in North Hampshire with a working population of 2,000. Three support helicopter squadrons and one
Army Air Corp squadron are based there. The installation of M2G was completed on behalf of Scottish and Southern Energy
Contracting. Following the installation analysis was completed at the main boiler house which demonstrated gas consumption was
reduced by 15% and payback achieved in just 14 weeks. The payback for the entire site is expected to be 36 weeks, reducing energy
costs by over £89k a year.
The results were analysed from the onsite AMR consumption data provided by RAF Odiham. The data was degree day corrected to
normalise the impacts of the weather. As the graph below illustrates, gas consumption reduced following the installation of M2G
compared to previous year despite the weather being considerably colder.
Colder weather
“The savings delivered were during one
of the coldest periods, with boiler dry
cycling at a minimum. Yet savings of
15% were still achieved.
Lower
consumption
Quick payback, integration with existing
Installation controls and the ease to implement
of M2G across an estate have demonstrated
M2G as a key technology to reduce
energy costs and carbon emissions.”
Richard Plester
Area Development Manger
Scottish & Southern Energy Contracting
How does M2G reduce energy consumption?
The M2G is an intelligent boiler load optimisation controller that improves the efficiency
of each individual boiler by removing “dry cycling”, an inherent problem found in over
80% of commercial boilers.
M2G is retro-fitted to each boiler and monitors the temperature of the water in the flow
and return every 10 seconds, enabling the M2G to analyse the temperature losses from
the boiler. The M2G calculates whether the temperature loss is caused by a genuine
heating demand or from standing losses i.e. temperature losses through boiler casing
and flue. When the boiler tries to fire as a consequence of the standing losses the M2G
will prevent the boiler from firing unnecessarily.
M2G complements and integrates with existing building controls resulting in substantial
reductions of energy consumption with quick payback periods. The combination of
volatile energy prices and increasing legislation is placing pressure on organisations to
improve their energy efficiency. As a result, M2G has been incorporated within the
estates of some the UK’s leading organisations.
For more information please visit
sabien-tech.co.uk
or call us
0800 082 18 18

6. AVIVA reduces energy consumption & CO2
by up to 17%
A pilot of Sabien’s M2G technology was conducted 3 AVIVA Ambient room and hot water temperatures were
sites. AVIVA is the world’s fifth-largest insurance group and unaffected during the pilot period. Sabien managed
the largest in the UK, with 57,000 employees serving around the pilot from start to finish, working closely with
45 million customers worldwide. onsite engineers and Norwich Union Management.
Sabien Technology focuses on helping both Private and
Public sector organisations reduce their carbon emissions and Integrates with Building Management
energy consumption typically between 10% and 25%. Systems
The majority of M2G installations are in buildings
Sabien and M2G delivered which have sophisticated Building Management
During the pilot, gas consumption and associated carbon Systems already in place. The M2G integrated
emissions were reduced by between 14% and 17%. Payback seamlessly with the existing Building Management
ranged from 41 to 62 weeks, with annual CO2 savings of 76 Systems across the 3 sites.
tonnes. Payback in under 1 year
During the pilot gas consumption and carbon
What is M2G? emissions were reduced by an average of 15%. This
The M2G is an intelligent boiler load optimisation controller equates to an average payback period of 50 weeks
that improves the efficiency of each individual boiler. A unit, and annual CO2 savings of 76 tonnes.
which can be retro-fitted to each boiler, monitors the
temperature of the water in the flow and return every 10
seconds and the information is recorded with heat transfer
rates at the first and second stage firings. Norwich Union commented: “AVIVA has a
well established CSR Policy, and is
When a loading demand is made, the system automatically committed to reducing its impact on the
checks the latest data it has stored and decides whether it is environment. As part of this, Norwich Union
more economical to retain first stage firing or to introduce a sets targets each year to reduce its carbon
second stage firing. The result can be a substantial fuel footprint.
reduction during less demanding situations while ensuring
maximum capacity during heavy load periods.
The reductions achieved by M2G in a wide
Pilot Methodology
range of organisations were impressive and
The test conditions and methodology were agreed with
Norwich Union. The 3 sites were chosen by the client and we wanted to confirm these ourselves with a
represented a cross-section of the Norwich Union building pilot scheme managed by Sabien at a
portfolio. The pilot was conducted over a period of 30 days. number of our sites. Sabien were open and
easy to work with, and together with the
M2G can be configured to operate in either „Save‟ (i.e. impressive savings achieved made a strong
days when the M2G is operational and makes savings) case to adopt M2G across the Norwich Union
and „Bypass‟ (i.e. days when the M2G is bypassed and estate.”
makes no savings) mode. A comparison of the boiler
firing periods was made between Save and Bypass days.
Variations in outside temperature were accommodated
using industry standard degree day calculations.
For more information please visit
sabien-tech.co.uk
or call us
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7. CASE STUDY: Department of Local Government and Communities
Sabien’s M2G achieves major energy
savings at CLG
M2G reduces energy consumption by up to 17% at Communities and Local Government
(CLG) the government department responsible for policy on local government, housing,
urban regeneration, planning and fire and rescue.
Energy Savings up to 17% - payback in 1.5 years Integrates with Building Management Systems
Initially the M2G units were installed to 10 boilers at three The M2G energy savings, which are over and above
CLG sites – Temple Quay House in Bristol, a Government those delivered by existing building controls, were
office block in Birmingham and the Fire Service College in achieved by minimising the common problem of dry
Gloucestershire. During the pilot phase the reduction in cycling that occurs when boilers fire to compensate for
energy consumption ranged from 8% to 17% with an standing heat losses from the system, rather than
average saving of 12% across all three sites, delivering a contributing to the building’s heating load.
projected payback of 1.5 years and anticipated reductions in
carbon emissions of 84 tonnes per annum. Wider rollout of Installation of the M2G forms part of a wide-ranging
M2G across the Government Office Network is now package of sustainability measures by CLG, which
underway. administers the Energy Performance Certificate (EPC)
and Display Energy Certificate (DEC) schemes.
Carmen Boscolo, MITIE’s Sustainability Manager for CLG
noted; Carl von Reibnitz, CLG’s Sustainable Operations
“The savings were measured between November 2008 and Manager said;
January 2009, which included the coldest weather in the UK “The M2G is a relatively low cost technology and very
for nearly 30 years, as boiler dry cycling occurs more in cost-effective for the savings achieved, so it is a low risk
milder weather, we anticipate making even greater savings investment and while reducing carbon emissions from
later in the year.” the CLG estate is a corporate objective, the payback
figures also have to stack up.
“The project is running very smoothly; once we collated data
from the asset log and provided contact details for facilities “Now that we have validated data following the success
managers on each site, Sabien have taken care of all of the of the first three installations we are recommending the
logistics,” she added. M2G to the various agencies and non-governmental
bodies that fall within the remit of CLG,”
What is M2G? He concluded.
The M2G is an intelligent boiler load optimisation controller
that improves the efficiency of each individual boiler. A unit
which can be retro-fitted to each boiler monitors the
temperature of the water in the flow and return every 10
seconds and the information is recorded with heat transfer
rates at the first and second stage firings.
When a loading demand is made the system, automatically
checks the latest data it has stored and decides whether it is
more economical to retain first stage firing or to introduce a
second stage firing. The result is a substantial fuel reduction
during less demanding situations while ensuring maximum
capacity during heavy load periods.
For more information please visit
sabien-tech.co.uk
or call us
0800 082 18 18

8. CASE STUDY: City of Bradford Metropolitan District Council
Bradford Metropolitan District Council reduces
energy consumption and CO2 emissions by up to
26%
Sabien was asked by City Of Bradford MDC to demonstrate the Pilot Methodology
energy consumption and CO2 savings by installing Sabien’s The test conditions and methodology were agreed with Bradford
M2G technology to eight boilers at three City Of Bradford MDC MDC. The 3 pilot sites were chosen by the client and represented
sites and piloting over a one month period. a cross-section of the Bradford MDC building portfolio. The pilot
was conducted over 30 days.
The pilot sites were Alhambra Theatre, Eccleshill Baths and
Keighley Town Hall. The chosen sites represented a good cross M2G can be configured to operate in either ‘Save’ (i.e. days when
section of different boiler applications and types of buildings the M2G is operational and makes savings) and ‘Bypass’ (i.e.
within the City of Bradford MDC portfolio days when the M2G is bypassed and makes no savings) mode. A
comparison of the boiler firing periods was made between Save
Sabien Technology Limited (Sabien) helps companies reduce and Bypass days.
their carbon emissions, energy consumption and therefore save
money. Based upon its established technology, M2G, Sabien's Variations in outside temperature were accommodated using
approach is proven to deliver typical carbon emissions and industry standard degree day calculations.
energy consumption savings of between 10% and 25%.
Ambient room and hot water temperatures were unaffected during
Average savings of 20% - payback in 28 weeks the pilot period.
M2G delivered significant savings Alhambra Theatre 9% saving,
payback 1.2 years, Eccleshill Baths 26% saving payback in 0.3 Sabien managed the pilot from start to finish, working closely with
years, and Keighley Town Hall 23% saving payback in 1.2 the onsite engineers.
years. Overall energy consumption was reduced by 20% and
payback in just 28 weeks. Integrates with Building Management Systems
The M2G integrated seamlessly with the existing Building
What is M2G? Management Systems. The majority of M2G installations
The M2G is an intelligent boiler load optimisation controller that are in buildings which have sophisticated Building
improves the efficiency of each individual boiler. A unit which Management Systems.
can be retro-fitted to each boiler monitors the temperature of the
water in the flow and return every 10 seconds and the
information is recorded with heat transfer rates at the first and
second stage firings.
When a loading demand is made the system, automatically
checks the latest data it has stored and decides whether it is
more economical to retain first stage firing or to introduce a
second stage firing. The result is a substantial fuel reduction
during less demanding situations while ensuring maximum
capacity during heavy load periods.
Building Management Systems (BMS)
The M2G integrates seamlessly with Building Management
System. The majority of M2G installations are in buildings which
have Building Management Systems already in place.
For more information please visit
sabien-tech.co.uk
or call us
0800 082 18 18

9. Land Registry’s reduces energy use
by 15% with M2G
The Land Registry has reduced its gas consumption and CO 2 emissions by 15% by installing
Sabien’s patented M2G technology at its offices in Peterborough.
Land Registry, the government department responsible for keeping and
maintaining the land registry for England and Wales is committed to
reducing its energy consumption. Sabien’s M2G reduced the gas
consumption costs for heating and hot water by 15% with payback in
just 32 weeks.
The Land Registry installed 2 M2G units to the 2 gas boilers at their
Peterborough Office. Sabien’s measurement and monitoring package
was used to demonstrate the savings.
Martin Illingworth, National Environment Manager, Land Registry noted;
“The introduction of this technology has demonstrated our commitment
to reduce Carbon emissions. We are extremely pleased with the results
and are looking to introduce Sabien’s M2G technology in to as many of
our buildings as possible over the next few years.”
“The savings at the Peterborough Office show a significant reduction
and helps towards the achievement of Government targets and
reduction in costs” he added.
Why is M2G needed?
The M2G is an intelligent boiler load optimisation controller that
improves the efficiency of each individual boiler by removing “dry
cycling”, an inherent problem found in over 80% of commercial boilers.
“The introduction of this technology has
M2G is retro-fitted to each boiler and monitors the temperature of the demonstrated our commitment to reduce
water in the flow and return every 10 seconds, enabling the M2G to Carbon emissions. We are extremely
analyse the temperature losses from the boiler. The M2G calculates pleased with the results and are looking to
whether the temperature loss is caused by a genuine heating demand introduce the Sabien M2G technology in to
or from standing losses i.e. temperature losses through boiler casing as many of our buildings as possible over
and flue. When the boiler tries to fire as a consequence of the standing the next few years.”
losses the M2G will prevent the boiler from firing.
Martin Illingworth
M2G complements and integrates with existing building controls National Environment Manager
resulting in substantial reductions of energy consumption with quick
payback periods. The combination of volatile energy prices and
increasing legislation is placing pressure on organisations to improve
their energy efficiency. As a result, M2G has been incorporated within
the estates of some the UK’s leading organisations.
For more information please visit
sabien-tech.co.uk
or call us
0800 082 18 18

10. CASE STUDY: O2
O2 REDUCES ENERGY
CONSUMPTION & CO2 BY UP TO 27%
At O2 they know that climate change is one of the most serious challenges facing society
and that every company has an important role to play in tackling it.
.
O2’s goal is to make energy conservation a way of life and to Integrates with Building Management Systems
minimise the company’s impact on the environment. The M2G integrated seamlessly with O2’s Trend Building
They have three main areas of focus: Management System. The majority of M2G installations are in
buildings which have sophisticated Building Management
1. To reduce and conserve the energy they use. Systems already in place.
2. To source more energy from renewable sources.
3. Offset CO2 emissions through capital investment in
renewable energy or through other offsetting initiatives. This
applies to the areas where they cannot reduce consumption
or source enough renewable energy.
Sabien Technology helps companies reduce their carbon
emissions, energy consumption and therefore save money.
Based upon its established technology, M2G, Sabien's
approach is proven to reduce carbon emissions and energy
consumption by up to 35%.
As part of their carbon reduction strategy and working with
Sabien Technology, O2 conducted an extensive pilot that
delivered average savings in energy consumption of up to 27%.
O2 is now working to roll out the M2G technology throughout its
UK buildings.
Sabien and M2G delivered
The pilot took place in two locations with 9 M2Gs fitted on 9
boilers used to heat the space and water of the offices. The
results of the pilot demonstrated average energy savings of
27% and 16%. A positive pay back at each site of less than 14
and 7 months respectively, with total annual CO2 savings of
196 tonnes.
Paul Eggleton, Energy Manager at O2, said: “We
What is M2G? have been very impressed with the performance
The M2G is an intelligent boiler load optimisation controller that
of the M2G units. They have lived up to all
improves the efficiency of each individual boiler. A unit which
can be retro-fitted to each boiler monitors the temperature of the expectations and because they are so easy to fit,
water in the flow and return every 10 seconds and the there was no interruption in service to the two
information is recorded with heat transfer rates at the first and trial buildings.”
second stage firings.
“We are now rolling out M2G to other corporate
When a loading demand is made the system, automatically
offices in our portfolio and look forward to seeing
checks the latest data it has stored and decides whether it is
more economical to retain first stage firing or to introduce a significantly reduced gas bills.”
second stage firing. The result is a substantial fuel reduction
during less demanding situations while ensuring maximum
capacity during heavy load periods.
For more information please visit
sabien-tech.co.uk
or call us
0800 082 18 18

11. CASE STUDY: University of Derby
University of Derby rollout M2G to reduce
energy costs and CO2 emissions
The University of Derby is making significant steps to reducing its impact on the environment,
winning the Green Gown award and the Ecocampus Silver award for Environmental Management
Systems.
M2G installation
Sabien Technology‟s M2G intelligent boiler load optimisers The M2G analyses the temperature differential over
have been installed across the University of Derby‟s campus time. This enables the M2G to identify „dry cycling‟ i.e.
following a successful pilot of M2G at the Kedleston Road the boiler trying to fire to recover its own heat losses. If a
site. The pilot resulted in a reduction in carbon emissions of genuine heating demand is made the M2G will identify
19 tonnes per annum – with a payback of 26 weeks. this and allow the boiler to fire – ensuring ambient
temperatures within the building are not compromised.
“Trying to find ways of saving energy and carbon emissions
is a large part of my job and for the cost involved in installing Project Management
M2G with the resulting short payback, there really was no “Once we had seen the savings possible from the pilot
alternative. Because not all boilers were compatible, we are project, the survey to identify compatible boilers was
able to compare the efficiency savings between those with quickly and efficiently carried out. M2G was installed with
M2G and those without. This has confirmed that M2G has a minimum of disruption and the units are unobtrusively
reduced the university‟s carbon emissions” explained Energy working away in the background saving the university
Officer, Anne Downes. energy and money. ” Anne Downes concluded.
M2G was installed within 7 campus buildings in the “The University of Derby‟s project demonstrates M2G‟s
University‟s estate, integrating with the existing Building application across different sectors and building types
Management Systems and delivering additional energy and the significant energy consumption reductions which
consumption savings and CO2 emission reductions. can be achieved” commented Sabien‟s CEO Alan
O‟Brien. “We work closely with all stakeholders during
What is M2G? the installation of our technology, enabling smooth
The M2G is an intelligent boiler load optimisation controller delivery within time and budget. With increasing energy
that improves the efficiency of each individual boiler. One legislation and the need to reduce costs increasing
M2G is required per boiler, and each M2G is wired into the pressure is being placed on organisations to improve
boiler‟s thermostat to reference its set point – this does not their energy efficiency. M2G is now recognised as pivotal
override or change the set points. Two digital probes are technology to deliver these objectives.”
fitted to the boilers flow and return pipe work. No system
drain down is required. M2G is listed on the Carbon Trust‟s Energy Technology
The M2G‟s digital probes record the flow and return List, verified by the EU‟s ETV and is approved for
temperatures every 10 seconds. London‟s Green500 initiative.
For more information please visit
sabien-tech.co.uk
or call us
0800 082 18 18

12. Sabien’s M2G delivers 14% energy
savings for ISH
International Students House (ISH) has recorded savings in gas consumption of 14%
following installation of Sabien Technology’s M2G intelligent boiler load optimisers – giving
a payback period of around 1.3 years.
ISH provides permanent and long stay accommodation for British
and International students at two properties in central London. In
recent years the organisation has implemented a wide range of
sustainability measures.
ISH has recorded savings in gas consumption of 14% following
installation of Sabien Technology’s M2G intelligent boiler load
optimisers – giving a payback period of around 1.3 years. The
M2G units are integrated with the existing building management
systems (BMS) and reduce energy consumption by controlling
dry cycling of the boilers.
“We renewed the boiler plant and BMS in 2006 and extended the
BMS in 2007 to optimise energy efficiency even further,”
explained ISH Chief Operating Officer David Chapman. “I had
previously thought that the BMS would also control dry cycling
but this was not the case, as the extra savings achieved by the
M2G units have proved,” he added.
A total of eight M2G units were retrofitted to boilers in three plant
rooms, in two buildings. ISH then carried out extensive
monitoring of the system, correcting the results with degree day
data to allow for changes in ambient temperature.
“I had previously thought
that the BMS would also
“The performance of the M2Gs was assessed during the very control dry cycling but this
cold weather at the beginning of 2010, so we are impressed with was not the case, as the
the reduced gas consumption under these conditions and can
reasonably expect greater savings in future years. The project
extra savings achieved by
was also implemented very efficiently by the Sabien team,” David the M2G units have proved”
Chapman continued. David Chapman
Chief Operating Officer, ISH
The savings achieved by the M2G units at ISH will reduce
carbon emissions by 72 tonnes per annum, with annual financial
savings of over £11,000
For more information please visit
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13. sabien managingcarbon
™
through energy reduction
CASE STUDY: NHS Trust
The intelligent way of
reducing fuel consumption
As part of its energy strategy, the Down and Lisburn HSS Trust has been Robert Spence MSc
testing boiler-optimising systems at several sites. One system reduced fuel is energy and
consumption by almost 20% on average without reducing patients’ comfort environmental manager
levels, and had a payback of less than a year, as Robert Spence reports. at Down Lisburn HSS Trust
The Down and Lisburn Health and Social Services Trust is part of the
National Health Service. The trust has a clearly defined energy and
Background to the trial
The trust decided to evaluate boiler-optimising units as part
environmental policy with two main objectives. The first is to reduce
of its energy policy. Previously, this type of control appeared to be
its overheads, wherever possible, so that quality patient care can be
fairly basic, but advances, particularly in electronic technology,
improved through more effective management of funds. The second
suggested that some of these controls had developed considerably,
is to reduce harmful CO2 emissions in line with the government’s
while others were just starting to enter the market. The trust conducted
commitment to the Kyoto Protocol. Reducing emissions helps to
a thorough assessment of these controls and divided them into two
create a cleaner local environment and sets an example to private
categories. The first category included controls that had little or no
sector companies, making them more aware of their responsibilities.
intelligence, which would make them suspect under the heavy loading
The trust has an excellent record of reducing energy consumption, conditions at some of the trust’s hospitals. The second category
having won many energy efficiency awards and certificates. included those controls that were more sophisticated, having
intelligence and engineering logic.
The Trust’s Energy Policy The trust decided to consider only those controls in the second
The Down Lisburn HSS Trust has 58 buildings, including general category, due to their ability to have at least some load-demand
hospital services; acute hospital patient care, elderly care and mental logic. Within this category, three units appeared worthy of
care buildings; and GP and training centres. As part of its commitment extended consideration.
to reduce energy, the trust has guidelines for considering products that
claim to reduce energy consumption. A product must have acceptable The trust decided to conduct initial tests on buildings that could be
supportive evidence before the trust will consider it for short-term monitored through its BEMS (Building Energy Management System),
tests. The trust is bound by the Patients Charter, and patients’ welfare and one particular control’s performance stood out from the others.
is of utmost importance. A test on any product will immediately It appeared to have a much higher level of intelligence and an advanced
terminate if comfort levels are not maintained. A product must also logic that included self-learning features. It also had a system
have acceptable engineering logic to capture our full consideration. diagnostic facility which none of the others had. It was decided
to test this unit on two buildings over a much longer period.
If the trust decides that there is conclusive evidence during initial
test conditions that the product has performed well without any side The trust purchased and installed four of the units that appeared to
effects, then the test is normally extended to a 12-month period. stand out from the others. Units were installed to
After this, if the trust is completely satisfied with the energy the boilers of a hospital block. The heating demand for this hospital
performance results, it may decide to bring the product to the required a room temperature of 25°C, due to the inactivity of the
attention of others in the form of a case study. This does not mean patients. Units were also installed at a second site, which was a GP
the trust endorses the product, but it is an indication for any other Health Centre. Unit installation was carried out by an approved
interested parties that the product has demonstrated its ability to contractor and took less than 90 minutes per unit.
reduce energy consumption in our buildings, and would have merit Due to the welfare of the elderly patients at the first site, the trust
for their own applications. repeated its stipulation that, if there was any unacceptable variation
in room temperature, the test would be immediately abandoned.
The trust placed calibrated data loggers to monitor room and ambient

14. temperatures every three minutes at both test sites. Supportive
evidence was supplied by the trust’s BEMS. Daily consumption was
Further Evaluation
The trust then decided to extend its trials to a further eight buildings
read manually at the same time every day and confirmed by the
and to monitor energy-consumption performance over a full year
BEMS. After revealing that there was no variation whatsoever in room
against its 18-year historical consumption data records. The buildings
temperature, the test was allowed to run its course over a full year.
were carefully selected to provide a good variation in operational
The trust evaluated the test findings and established that energy was
activity. Both natural gas and oil-fired boilers were tested, and their
considerably reduced and room temperature was maintained at both
capacity varied from 115kW to 600kW output. The trust selected a
sites, even when frost levels reached –5°C.
base year for making a comparison, because its degree days closely
reflected a five-year average pattern. The trial year, was a slightly
M2G System Logic milder year, so the appropriate weather correction was made. (For an
The unit under test was called the M2G System. The system monitors explanation of using degree days to take account of the weather’s
flow and return water temperature to each boiler at 10-second effect on energy consumption, see last month’s issue of Facilities
intervals. This picks up changing patterns in water temperatures Management.)
indicating such things as modulating zone valves, or radiator
thermostat valves opening and closing. The software captures these The tables below illustrate the before and after consumption rates at
changing temperatures in its memory and uses them to build a picture the eight sites after weather correction. The building with the heaviest
of current system demand, giving it a template to control burner energy use saw a reduction in consumption of 7%, while the saving in
firing. The trust could not find any other control in the marketplace the least load-demanding conditions was 34%. The average reduction
that applied the same degree of heat-transfer intelligence. in energy consumption across the sites over one full year was 19.2%,
and the total reduction in CO2 emissions was 240 tonnes. The average
All the trust’s boilers have two-stage firing and single thermostats. payback, based on recent increases in gas and oil prices was 0.73
Normally, the safety-control device sends a signal to the burner to years. Room temperature at all the buildings was at least
ignite the second-stage fire after a fixed time, which is unrelated to maintained and, in some cases, was slightly higher during M2G
system demand or ambient temperature. Instead, the M2G software System control.
establishes if the second-stage fire is necessary and, if so, when to
introduce it most economically. During the 12-month monitoring
exercise, there were definite periods, especially from 10 or 11am to
Benefits Of The System
The M2G System appeared the most advanced boiler control we could
3 or 4pm, where second-stage firing was greatly reduced. This not only
find, and the engineering logic has been well thought out. The trust’s
reflected the general pattern of ambient temperature rising to its daily
trials have proved that the M2G System is effective at reducing energy
peak, but also the rate of building heat loss slowing down. The M2G
consumption while maintaining room temperature. There were no side
System responded to these situations effectively and maximum
effects, and the payback on investment was very attractive.
reduction in energy consumption occurred during these periods,
although it was not restricted to them. Second-stage firing consumes The reduction in energy is certainly a major benefit, but less energy
a lot more fuel than the first stage, and a reduction in second-stage consumption means less boiler activity, which, in turn, has other
activity generates considerable savings, even with longer first-stage benefits. There has been a reduction in electricity because there is less
firing. Despite the reduction in second-stage firing even through burner motor activity and, if the burner functions less, both it and the
prolonged periods, room temperature was still maintained. boiler should last longer, which delays capital investment for boiler
replacement. A reduction in energy use means boiler- servicing
Each boiler must have an M2G System unit installed, which, because
intervals can be extended.
no two boilers have the same rise-and-fall temperature characteristics,
is boiler-specific. A series of LEDs on the unit panel indicates the Since purchasing and installing the first units, the trust has never had
current status of the unit and what function it is performing at a unit malfunction or a cause to complain. It has now purchased and
any given moment. installed these devices on all other suitable trust estate buildings and,
after six months, these buildings are reporting the same kind of
reduction in energy consumption.
Before and after consumption rates
NATURAL GAS CO2
Year 1 Year 2 Percentage Payback tonnes
mWh mWh saving in years reduced
Laurelhill House 557.30 412.99 25.9% 0.99 27.4
Seymour House 854.70 750.22 1 12.2% 1.36 19.9
Lindsay House 182.50 145.59 20.2% 3.86 7.0
Lisburn ATC 613.50 446.10 27.3% 0.85 31.8
CLASS D OIL CO2
Year 1 Year 2 Percentage Payback tonnes
litres litres saving in years reduced
Finniston House 197,621 162,788 17.7% 0.30 94.1
Nurses Residence 70895 65,667 7.4% 1.86 14.1
Maternity Block 172,503 160,145 7.2% 0.78 33.4
Hillsborough Health Centre 13,005 8,472 34.9% 2.14 12.2
For more information visit sabien-tech.co.uk
or call 0800 082 18 18

15. CASE STUDY: Serco
Sabien‟s M2G saves energy in Serco‟s
centre of excellence
A pilot of Sabien‟s M2G intelligent boiler load optimiser at the headquarters of Serco, a
leading service provider and FTSE 100 company produced significant energy savings.
The M2G will now be an integral component in the range of M2G, intelligent boiler load optimisation is able to
energy efficiency measures that Serco offers its customers. differentiate between a genuine need for heating in a
Graeme Cameron, Serco‟s Director of Energy and building and a call for the boiler to fire simply to
Sustainability Services said; “Serco has been offering compensate for standing heat losses from the boiler
energy management services to customers for many years itself – a phenomenon known as „dry cycling‟. Dry
and we are now in the process of extending our cycling can be a consequence of the boilers being
capabilities and restructuring the package of energy oversized and occurs most often during relatively mild
services we offer. Our energy monitoring system indicated weather when boilers are operating under light
a potential issue with the boiler operation at our conditions, resulting in the boilers frequently switching
headquarters so we decided to trial the M2G”. It was also on and off, therefore wasting energy.
important that we validated the energy savings M2G could
deliver before offering it to our customers,” he added. Serco‟s M2G savings validation
At Serco House, Sabien‟s proven pilot methodology was
12% saving and payback in 68 weeks supplemented by Serco‟s highly sophisticated energy
The M2G pilot was carried out during February 2009 at monitoring software, which is able to compare boiler
Serco House in Hampshire, which is, in itself, a centre of operation with ambient temperature conditions to
excellence for energy efficiency and a showcase for evaluate the M2G‟s ongoing performance. Alan Taylor
Serco‟s services. As such, it is a modern, well-insulated noted “This new software clearly shows that the boilers
building with modern, highly efficient boiler plant controlled are responding to load conditions, and not just BMS-
by a sophisticated building energy management system driven return HTW temperature set points,”
(BEMS). Complementing the operation of the BEMS, the
M2G system delivered energy savings of 12% during the Looking ahead
pilot, providing a payback in just 68 weeks. “We have two major objectives,” said Graeme
Cameron. “One is to minimise our own energy
Alan Taylor, Serco‟s Technical Manager, Government consumption and environmental impact as part of
Integrated Services said; “We were particularly our Corporate Social Responsibility obligations.
impressed with the results because the pilot took The second is to be able to offer the best solutions
place during the coldest weather we‟ve had in 30 to our customers, secure in the knowledge that
years, when dry cycling would have been at a these have been thoroughly tested and validated.
minimum, It„s clear that significantly higher savings To that end, we are keen to work closely with
will be achieved during more temperate conditions and Sabien in the future,” he concluded.
our ongoing monitoring already supports that view.
Many people think BEMS can control every aspect of a On the strength of the pilot results, Serco intends to
boiler‟s operation but this is not the case. The M2G include the M2G in the wide range of energy services it
interfaced very smoothly with our BEMS and the two will be offering customers, as well as using the units to
now complement each other to maximise energy reduce its own carbon footprint.
savings” he continued.
For more information please visit
sabien-tech.co.uk
or call us
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16. CASE STUDY: Jones Lang LaSalle
Jones Lang LaSalle rolls out M2G
Jones Lang LaSalle is a financial and professional services firm specialising in real estate
services and investment management. With more than 30,000 people in 750 locations in 60
countries.
Payback in just 21 weeks
Installation of Sabien Technology’s M2G intelligent boiler When a loading demand is made the system, automatically
load optimisers at two offices, on behalf of managing checks the latest data it has stored and decides whether it is
agents Jones Lang LaSalle (JLL), has resulted in more economical to retain first stage firing or to introduce a
significant energy and carbon emissions savings with a second stage firing. The result is a substantial fuel reduction
return on investment of just 21 weeks. As a result, JLL is during less demanding situations while ensuring maximum
now recommending use of the M2G at the other sites and capacity during heavy load periods.
clients’ estates it manages.
Mark Bottriell, Jones Lang LaSalle’s Portfolio Energy
CO2 reduced by 96 tonnes per annum
In both cases, the M2G units achieved a 6% reduction in gas
Manager for Europe, Middle East and Africa, commented:
consumption, saving around £21,500 per annum and reducing
“The energy savings that the M2G can deliver have been
CO2 emissions by 96 tonnes per annum, the return on
fully validated so we now have complete confidence in
investment was just 21 weeks. However, as these
recommending it to our customers.”
measurements were taken during the coldest period for over
20 years, when the energy wastage through dry cycling would
Working closely with JLL’s maintenance contractor, Sabien
have been at a minimum, it’s likely these savings will be even
installed M2G at two sites in Swindon and Basingstoke
greater.
belonging to a global mobile phone manufacturer. Both
buildings were already operating building management
Indeed, the potential for major savings was shown at another
systems (BMS) but these were not controlling the dry
site managed by JLL, the Palm Terrace in California, where
cycling of the boilers caused by standing heat losses from
M2G units reduced gas consumption for space heating and
the system.
hot water by 22%.
“The BMS at the site in Swindon is very sophisticated and it
Another key element in the success of the project was the
would have been technically possible to have a special
project management, undertaken by Sabien working closely
program written to control the dry cycling, but it was more
with JLL and JLL’s maintenance contractor.
time-effective to use an off-the-shelf product, which has
potential to integrate fully with existing BMS, particularly
“Sabien responded quickly once we got the go-ahead for the
when contemplating new programming requirements,”
pilot from the client and proved to be very flexible in
Mark Bottriell observed. “In contrast, the site in
accommodating our requirements. We will now be working in
Basingstoke, the BMS was simpler and, in fact, even with
partnership with Sabien and our maintenance contractor as
already well-optimised boiler sequencing, achieving even
we look to try and roll-out M2G across other candidate sites,”
further savings with this system is very impressive,” he
Mark Bottriell concluded.
added.
What is M2G?
The M2G is an intelligent boiler load optimisation controller
that improves the efficiency of each individual boiler. A unit
which can be retro-fitted to each boiler monitors the
temperature of the water in the flow and return every 10
seconds and the information is recorded with heat transfer
rates at the first and second stage firings.
For more information please visit
sabien-tech.co.uk
or call us
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