EU Proposes Energy Rating System as Data Centre Demand Set to Triple

Europe's data centres are about to get much bigger, and much thirstier for power. The EU wants to triple its data centre capacity over the next five to seven years to meet growing computing and AI demand, with electricity consumption from the sector projected to exceed 3% of total EU demand by 2030, according to the International Energy Agency. The Commission's own modelling goes further still: under its central scenario, EU data centre demand could reach around 61.5 GW by 2036, against roughly 42.5 GW of installed supply today, a 19 GW gap European Central Bank President Christine Lagarde has pointed to as a reason Europe needs to build faster.

That scale of growth doesn't just mean more electricity. It means more pressure on grids, more water drawn for cooling, and, without changes, more carbon emissions. To manage that, the European Commission has proposed a common EU-wide rating scheme for data centres, an A-to-G style label similar to the ones already used for household appliances, aimed at making the sector's actual resource use visible for the first time.

The scheme will apply to individual data centres above 500 kW and will report on actual energy and water use, whether the site reuses its waste heat, how much clean energy generation it adds to the grid, and whether it can flex its electricity use to help balance the system. That flexibility matters more than it might sound: well-designed data centres that adjust demand to grid conditions can lower system-wide electricity costs and support more renewable energy on the grid, rather than simply adding a fixed new load to it.

Waste heat reuse is one of the more striking numbers in the proposal. The Commission estimates that recovering around half of the heat currently wasted by European data centres would be enough to meet the heating needs of four million households, heat that is otherwise simply vented into the air.

The rating scheme itself is only the first step. The Commission is also consulting on minimum performance standards for data centres, a further stage it describes as building on the disclosure rules that come first, before the labels themselves start appearing on individual sites.