As one of Britain’s biggest listed food companies, Premier Foods are committed to the UK, employing over 4,000 people at 15 sites and offices up and down the country. More than 97% of what they sell is made in the UK from quality ingredients, wherever they can be sourced sustainably from British suppliers and farmers.

The engineering workshop at Premier Foods, Bury St Edmunds in the UK, had a requirement for both heating and cooling solutions. EcoCooling was able to come up with a combination solution that provided both heating and cooling through the use of a single EcoCooler unit.

The fan from the cooler was removed and relocated into the ductwork after a recirculation loop was installed. This created a roof-mounted ‘wet box’ which had the ability to provide either ambient or evaporatively cooled air as well as a recirculation loop which, using a steam heating coil, which provided the source for heating.

The two modes of operation in the building are as follows:

Summer mode: Cooler operates conventionally with five speeds and ‘Cool’ or ‘Vent’ Modes. The inlet damper is open and recirculation damper is closed, providing cool air for the summer months.

Winter mode: Air is heated using a steam coil controlled by a thermostat. The fan runs at a fixed speed, the inlet damper is closed and the recirculation damper is open, providing warmer air in the winter months.

The WetBox evaporative cooler contains inbuilt evaporative cooling pads and should be used as part of a mechanical ventilation system or air handling solution with a paired supply and extract fan. They are designed to be externally mounted and the standard configuration is downflow, where the air is supplied from the base of the cooler into the area that requires cooling (and heating in this particular case study).


A variety of control options are possible since all control functions are based on switches. A simple modification of the existing wall control panel gave the facility to interface with the thermostatic controls.







At EcoCooling our mission is to save the country 1% on its total energy bill. That’s equivalent to shutting down a power station!