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Case Studies

Waitrose Chilled Water Conversion

  • Client

  • Location

  • Sector

  • Requirements

    Convert existing refrigerated coldrooms, display cabinets, and counters to chilled water cooling
  • Objective

    Reduce the amount of refrigerant on site

Waitrose have an on-going programme of projects that include action to reduce the volumes of refrigerant used at their store locations. Successful in competitive tender, Horsfield were awarded the contract to convert the Stamford store from refrigerant to chilled water to provide the cold-room, counter, and display unit cooling.

Pipework systems
Following the removal of the refrigerant based system, chilled water now satisfies the cooling demand. The chilled water is delivered to the store via carbon steel & Victaulic pipework.
External plant
The plant delivering the chilled water to the store is now refrigerant free.
In-store distribution
Discrete pipework within the store ensures that chilled food display cabinets are free to present produce in an uncluttered environment.


The new chiller system has resulted in a significant reduction of onsite refrigerant at the Stamford store with the following benefits being realised by Waitrose:

  • no ozone depleting gas present in this system
  • zero potential for leaks of harmfull and costly greenhouse gas to atmosphere
  • a reduction in the store’s carbon footprint
  • reduced energy consumption through a more efficient system
  • This project sits within the John Lewis Partnership Corporate Policy plan, and is another step towards reducing the environmental impact of their business.