In order to save primary energy resources, the member states of the European Union are implementing the required measures for using alternative energy. There are various potential routes to zero carbon housing, but the most practical one is communal and household microgeneration. Microgeneration produces heat and even electricity for domestic households. By the year 2050 micro-cogeneration systems could provide 30–40% of the electricity demand in Great Britain. In Latvia, the consumption by households accounts for 38% of the total energy consumption. 87% of the total consumption of energy resources is used for heating houses and producing hot water; 13% (electricity) is used for operating household devices and lighting. The operating hours of a household heating unit are equal to approximately 5 800 hours per year; if a micro cogeneration unit with the electrical capacity 1–3 kW is installed, it can cover the self-consumption of an average household. The annual electricity generation can amount to 15 000 kWh.