Energy balance of the building is a comprehensive account of all energy flows occurring in a building over a defined period of time, including both energy gains and losses. It makes it possible to determine the actual energy demand of the building and assess the effectiveness of the design and installation solutions used. Energy losses primarily include:
- heat loss through the building envelope,
- losses due to ventilation and air infiltration,
- losses associated with the operation of technical systems.
Energy gains, on the other hand, include internal gains from occupants, appliances and lighting. They also take into account solar gains from the insolation of transparent partitions.
The energy audit of the building itself takes into account climatic conditions, the orientation of the building in relation to the world, the performance of the building envelope, the efficiency of the installations and the way the building is used. It is the basis for energy performance calculations, the selection of heating, cooling and ventilation systems and assess the cost-effectiveness of solutions to improve the energy efficiency of the building.
