A 1970s school in Denmark with a poor energy rating was upgraded via a national energy efficiency programme. Before the project the school used 1,955 MWh per year corresponding to the key figure of 120 kWh/m². Once the improvements had been completed, this consumption dropped to 1,490 MWh per year, or 92 kWh/m². This represents a reduction in energy consumption of 465 MWh or 24%, which equates to 75.6 tCO2 saved per year.