Food retailer Iceland has reduced energy costs by £4.8 million following the installation of Airedale’s ACIS control system in all its 800+ stores, an average of £6000 per store, as part of a major upgrade programme. The move followed the success of installations in 50 stores. In stores where the control system was installed but no changes made to plant, Iceland could compare and evidence energy draw before and after installation. Energy costs have been reduced by 10%, with an expected payback on the investment within two years. The new system provides tighter and more intelligent levels of control, coupled with free cooling and part-load efficiencies during off-peak and non-trading hours.