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Sainsbury's – Superstore Upgrade with 20% energy reduction

Energy & Technical Services delivered a number of energy saving initiatives as part of Reset 7, Sainsbury’s 20 by 20 Sustainability Plan, comprising upgrades to the refrigeration packs, sales floor / back of house lighting, cold aisle heating, HVAC fans, BMS controls and store pressurisation to a 62,766 sqft Superstore.

The inefficient and aging F-Gas screw packs and associated condensers were replaced with new scroll pack internal units with external air-cooled condensers, F&R pipework and controls.

The existing T8 lights on the sales floor and back of house were replaced to LED and a new 22KW plug fan was installed to the HVAC unit. Works also included installing LPHW boilers and heating coils into the Air Handling Unit (AHU) as well as DHW calorifiers to boost heating requirements especially for the cold aisles. The existing Trend BMS set points / time schedules were also reset to improve energy efficiency.


To enable the refrigeration plant installation and replacement, cabinets needed to be de-merchandised overnight during 2 weekends. Close consultation with multiple subcontractors, consultants and client representatives was essential to ensure all the various works / upgrades were completed out of hours and on time, so that trade was not impacted.

Added Value / Achievements

The combined works provided a pay back within 4.68 years with a store energy reduction of 20%.


20% of energy reduction


Date Palm Developments – Complete Building Solutions

Date Palm Developments (DPD) approached ETS to design, install, and commission a new Building Management System (BMS) for their proposed "Ottons Lab." Given the complex nature of the facility, which specialises in plant cloning, highly detailed designs relating to HVAC controls and operational security were necessary to maintain optimal conditions for both plant growth and occupant comfort in the office areas.

BNP Paribas – Simulated Power Failure

The power test was successful with back-up power supplies, fire alarms, emergency lighting, pedestrian access systems all operating as expected during power failure. All equipment operated correctly and efficiently when power was reinstated.

Harris Lamb – Mechanical & Electrical Performance Specification

Successful office fit-out project with upgraded VRF heat pump cooling, LED lighting and heat recovery ventilation. Improved energy efficiency and occupant comfort led to an increase in the Energy Performance Certificate (EPC) rating from C to B.