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Sabien’s M2G delivers energy savings for Northumbria Healthcare

25 November 2015

Measurement and verification of Sabien M2G boiler load optimisers for Northumbria Healthcare NHS Foundation Trust has reduced energy costs, delivering a payback of 3.7 years

The measurement and verification was carried out across three buildings – Northumbria House, Alnwick Infirmary and Blyth Community Hospital – providing a representative sample of the buildings within the Trust’s estate. The energy consumption of seven boilers fitted with M2Gs was then measured for a period of one month and adjusted in line with Degree Day data from a local weather station.

Analysis of data, carried out in line with the International Performance Measurement & Verification Protocol (IPMVP), showed that savings in gas consumption ranged from 4% to 9% with an average of 5% across all of the boilers. The boilers ranged in size and included newly installed Viessmann Vitocrossal 300 and Remeha P420 boilers.

Mike Blades, Energy and Sustainability Officer for Northumbria Healthcare NHS Foundation Trust said: “I am very pleased with the results of the project. What surprised me most was the level of savings achieved on our modern high efficiency boilers.”

Crucially, the M2G was operating alongside, and in harmony with, the existing controls so that the savings were in addition to those already being achieved.

During the Measurement & Verification (M&V) period the M2G is configured to toggle between ‘save’ mode and ‘bypass’ mode. In save mode the M2G is operational and makes savings, in bypass mode the M2G is bypassed and makes no savings. This then provides a comparison between save and bypass days, with adjustment using standard degree day calculations to take account of variations in outside temperature.

Geoff Newman, Business Development Director for Sabien Technology Ltd said: “Sabien is pleased to have won the tender and verify the business case benefits for Northumbria Healthcare NHS Foundation Trust. This project again demonstrates the effectiveness of M2G within the NHS to reduce energy costs, with a quick payback regardless of the boiler plant age and existing controls.”

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