Refrigeration Inefficient old fridges and freezers can cost schools over £500 per year to run per appliance. A modern fridge or freezer can cost as little as £50 per year to run, so the payback on replacement appliances can be less than a year.
A larger fridge/freezer can be more efficient than 2 smaller ones.
Make sure fridge/freezer is the most efficient possible, and meets or exceeds the energy performance benchmarks.
Double-door units are in general more efficient than single-door
Specify more smaller ovens and a choice of oven sizes to increase operational flexibility and reduce energy use.
Purchase ovens with highest food energy efficiency and lowest idle rate e.g. Energy Star.
Specify cookers with the shortest warm-up times
. Extraction units
Consider vertical stacking of ovens to reduce the area of the extraction hood.
Ensure that the minimum air flow required for plume extraction from the cooking equipment is calculated to avoid over-specification.
Specify high efficiency fans types and fan motors.
Install variable speed drives on the fan motors so that system power can be varied to minimise energy use.
Purchase the most energy efficient equipment (in kWh/100 dishes)
Consider models with heat recovery from hot sanitation.
Purchase water-efficient dishwashers as these tend to be the most energy-efficient.
Where centrally-generated hot water is available provide hot feed to the dishwasher as this can reduce running costs.
Where local hot water generation exists, it may enable heat recovery from refrigeration.