In May 2018, the Our Society survey series (Naše společnost) included an extra battery of questions about expenditure on and savings of energy utilities, heat and water in households. We examined whether people are acquainted with the expenditure on energy utilities, heat and water in their households, whether they find it easy or difficult to cover that expenditure, whether they are interested in technologies for a more economic management of energy utilities, heat and water, whether they have invested in these technologies over the past five years or are at least considering such an investment, whether they have ever drawn grants from programmes to support the installation of these technologies in households, and whether they decide take energy class into consideration when purchasing appliances.