The efforts to increase energy efficiency and reduce energy consumption and CO2 emissions are met with several psychological biases. Even though behavioural science has offered significant knowledge through several small-scale pilots, the need for urgent intervention calls for fast and large-scale programmes. What is more, it is essential to understand how intervention programmes based on behavioural science can be delivered in real-life situations. The EU-funded ENCHANT project will assess existing knowledge, analyse available data in the field and design realistic intervention programmes, applying them in six EU Member States. The consortium consists of a range of user partners aiming to test a vast selection of intervention actions, considering a large variety of psychological biases and focussing on gender specific effects.