Boiler optimiser delivers major energy savings with fast paybacks
June 21st 2009

Sabien’s M2G patented boiler load optimiser is delivering significant energy savings with fast paybacks in a wide range of projects

For instance, M2G units fitted at offices managed by Jones Lang LaSalle (JLL) reduced gas consumption, by around £21,500 per annum and CO2 emissions by 96 tonnes per annum; the return on investment was just 21 weeks.

Sites operated by Communities & Local Government (CLG) achieved an average saving of 12% with a projected payback of 1.5 years and anticipated reductions in CO2 emissions of 84 tonnes per annum.The M2G interfaced with the existing Building Management Systems (BMS).

Carmen Boscolo, MITIE’s Sustainability Manager for CLG noted: “Once

we collated data from the asset log and provided contact details for

facilities managers on each site, Sabien took care of all of the logistics.”

What is M2G?

M2G is an intelligent boiler optimiser retrofitted to commercial boilers regardless of age and size. M2G specifically removes dry cycling, a common problem found in most boiler houses. Dry cycling occurs when boilers stand idle, losing over 5% of their heat to the surroundings i.e. acting as giant radiator. Inevitably, the boiler will fire unnecessarily to overcome these temperature losses and not contribute to the building’s heating demand - therefore, wasting energy.

M2G eliminates dry cycling by analysing the boilers’ firing patterns, measuring and analysing both the return and flow temperatures every 10 seconds. The M2G identifies the dry cycling and prevents the boiler from firing unnecessarily. Any changes to the boilers’set point via other controls will be picked up by the M2G resulting in no impact to the building’s ambient temperatures.

FM provider Serco installed M2G at its own headquarters to address dry cycling (something that building energy management systems do not typically address).Complementing the operation of the BEMS,the M2G system delivered energy savings of 12%, providing a payback in just 68 weeks.

“Many people think a 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 systems now complement each other to maximise energy savings” explained Alan Taylor, Serco’s Technical Manager for Government Integrated Services.

As a result, Serco is now offering M2G to its clients.“It was important that we validated the energy savings M2G could deliver before offering it to our customers,” noted Director of Energy and Sustainability Services Graeme Cameron.

Sabien’s M2G enables significant energy and CO2 emission reductions to be achieved across multi-site estates and this is combined with end-to-end nationwide project management and hassle-free estatewide installations.