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CO2 systems back Waitrose online service

UK: Preston-based CO2 refrigeration manufacturer Isentra has supplied three dual temperature transcritical CO2 systems for the new Waitrose customer fulfilment centre in Greenford, West London.

The CO2 refrigeration from Isentra was part of a full suite of systems provided by contractor DD Cooling to operator Wincanton at the new centre which opened last month.

DD Cooling was selected as the refrigeration engineering contractor for the project and was also commissioned to build the insulated cold store structures. DD Cooling brought in industrial CO2 plant specialist Isentra to supply three independent dual temperature transcritical CO2 systems and provide full system design and commissioning support.

When fully running later this year, the centre will deliver 25,000 online Waitrose orders each week, helping to offer five times more online slots each week in London than before the pandemic. Staff at the centre will pick and pack 1.25 million products a week, delivered in 150 new vans.


Each CO2 system was fitted with Isentra’s full resilience option, which includes back-up controls and standby pressure regulators for the systems, which have a combined heat rejection of around 800kW.

“Waitrose has been employing natural refrigerants to minimise its environmental impact for many years and the Greenford project extends the retailer’s existing CO2 portfolio,” commented Isentra managing director Daniel Clark.

Dave Dobson from DD Cooling said: “Isentra has been a key partner on the project, supplying not only the CO2 refrigeration plant, but providing comprehensive system design, coordination and commissioning.”

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