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Sainsbury's – LED and HVAC Upgrade

As part of Sainsbury’s 20 by 20 Sustainability Plan, Graphite 6, Energy & Technical Services was appointed as the main contractor to project manage improvement works to the Plymouth Armada Centre Superstore.

After completing a comprehensive survey of the store, Energy & Technical Services identified four key energy saving initiatives which comprised LED lighting upgrades, optimising refrigeration, air source heat pump replacements and replacement of plug fans to the Air Handling Unit (AHU).

Works involved replacing the existing T5, T8 and T12 lights on the sales floor, along with back of house, external canopy and car park lights to LED. The refrigeration time control settings were reset to the correct schedules and the existing air source heat pump units (operating on electric heater batteries), were replaced to more efficient systems.

In addition, a new 15kWh plug fan was installed to replace the old 18.5 kWh belt driven fan and motor to the AHU.


Works had to be completed in a single phase at night to ensure trade was not impacted. Energy & Technical Services was instrumental in coordinating the works through close consultation with subcontractors and client representatives.

Added Value / Achievements

Energy & Technical Services deployed several approved specialist subcontractors to further interrogate/investigate the energy saving initiatives proposed, to ensure the anticipated savings were as accurate as possible. The energy savings delivered by the combined works was 413,620 kWh equating to £43,017 pa with a store energy reduction of 20% and an approximate pay back of 4.46 years.

HVAC review & led lighting upgrade

Energy saving project management


The Fulham Shore – ESOS Compliance & Consultation

The Energy Savings Opportunity Scheme is compulsory for large UK organisations. A total of 29,610,620kWh opportunities were identified for The Fulham Shore, resulting in 31,783,515 Kg of emissions being saved.

Woodie’s – Significant Cost Savings & Ongoing Support

Woodie’s is a 100% Irish owned chain of DIY outlets, and a subsidiary of the Grafton Group plc. Woodie’s are committed to minimising their environmental impact and with 35 stores in Ireland, sought external expertise to help establish control of energy usage and deliver deep, sustained energy and carbon savings.

Wokingham Borough Council – 49% Proven energy savings

The existing BeMS controls for the site were poorly controlling the LTHW boilers across various plant rooms at the site, some plant areas were found to be running 24hrs a day. The existing building controls were removed and replaced with RDM controls utilising improved optimum start/stop algorithms, alongside demand-based temperature control and vastly improved zone control.