This paper introduces EMLab-Consumer, an agent-based model developed in the H2020 project Cheetah, on energy efficiency of households. The model builds on the theory of planned behavior, a large European survey and a variety of choice models generated from the same survey. It studies adoption of a number of energy efficient appliances and heating systems in 8 EU countries, under a variety of policy interventions. The paper describes the model and first outcomes on smart thermostats.