Dr Hazas' research is concerned with everyday practices and technologies, and how they can be related to sustainability.

These include practices like playing, working or doing the laundry, and their connection to energy demand and wider impacts such as greenhouse gas emissions. He applies multidisciplinary observational approaches which juxtapose quantitative measures of demand and impact, and qualitative/quantitative data from everyday life (e.g. room occupancy, appliance times-of-use, routines of practice, and social meanings and expectations). Specific empirical sites have included cooking, thermal comfort and digital media and entertainment.