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SABIEN'S M2G achieves major energy savings for CLG

17 June 2009

Sabien Technology’s M2G intelligent boiler load optimisers are delivering significant energy savings at sites operated by Communities and Local Government (CLG), the government department responsible for policy on local government, housing, urban regeneration, planning and fire and rescue.

Initially the M2G units were installed to 10 boilers at three CLG sites – Temple Quay House in Bristol, a Government office block in Birmingham and the Fire Service College in Gloucestershire. During the pilot phase the reduction in energy consumption ranged from 8% to 17% with an average saving of 12% across all three sites, delivering a projected payback of 1.5 years and anticipated reductions in carbon emissions of 84 tonnes per annum.

In addition, M2G units were fitted to boilers at CLG’s Eland House headquarters in London, where the boilers were considerably newer and more efficient. Here, 9% savings were achieved during the measurement period and the M2G units continue to deliver ongoing energy and emissions savings.
A wider rollout of M2G across the Government Office Network is now underway.

The M2G energy savings, which are over and above those delivered by existing building management system, were achieved by minimising the common problem of dry cycling that occurs when boilers fire to compensate for standing heat losses from the system, rather than contributing to the building’s heating load.

Carmen Boscolo, MITIE’s Sustainability Manager for CLG noted: “The savings were measured between November 2008 and January 2009, which included the coldest weather in the UK for nearly 30 years, as boiler dry cycling occurs more in milder weather, we anticipate making even greater savings later in the year. The project is running very smoothly; once we collated data from the asset log and provided contact details for facilities managers on each site, Sabien have taken care of all of the logistics,” she added.

Installation of the M2G forms part of a wide-ranging package of sustainability measures by CLG, which administers the Energy Performance Certificate (EPC) and Display Energy Certificate (DEC) schemes.

Carl von Reibnitz, CLG’s Sustainable Operations Manager said: “The M2G is a relatively low cost technology and very cost-effective for the savings achieved, so it is a low risk investment and while reducing carbon emissions from the CLG estate is a corporate objective, the payback figures also have to stack up.

“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,” he concluded.


Technical notes

M2G, intelligent boiler load optimisation is able to differentiate between a genuine need for heating in a building and a call for the boiler to fire simply to compensate for standing heat losses from the boiler itself – a phenomenon known as ‘dry cycling’. Dry cycling can be a consequence of the boilers being oversized and occurs most often during relatively mild weather when boilers are operating under light conditions, resulting in the boilers frequently switching on and off, therefore wasting energy.

Further information can be found at www.sabien-tech.co.uk or my emailing reduceC02@sabien-tech.co.uk


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