What does energy efficiency means?

Energy efficiency is efficient energy use. In order to reduce energy consumption in the building, it is necessary to understand what are the losses of the heat in the buildings, why they occurred and which energy efficiency measures should be taken. Since each house is unique, so the energy efficiency measures for each building will be different.

Energy - efficiency measures

An important factor affecting consumption of thermal energy is the technical condition of the building or the thermal stability of the building. Often the biggest losses of thermal energy, about 30-50% and more, occur directly in the building, therefore, cooperation between home residents and the facility manager in the implementation of various energy efficiency measurements is crucially important.

Consumption of thermal energy will always be higher in old houses, where no renovation work has been done, while buildings that have energy efficiency measures will also have lower consumption of thermal energy. The most heat-saving effect – 50% and more % – ensures that the whole house is arranged: a regulated heat node, renovation of an internal heat supply system and insulation of the house. However, even partial improvements – insulation of the attic, cellar or exterior wall, reconstruction of the heating system or effective control of the individual heat node of the building – will reduce both the total consumption of the thermal energy of the house and the total heating costs. Complex measures taken in the building will ensure lower consumption of thermal energy for the house as a whole, which in turn will also benefit the individual thermal energy user individually.

More information on the implementation of energy efficiency measures for buildings in Liepāja is available on the homepage of the City Council of Liepāja.

Change everyday habits

Another important way of saving heat is to change the habits of residents. Using some simple conditions on a daily basis, thermal energy consumption can decrease significantly:

  • water temperature – centralized heat supply provides not only heat but also hot water, which usually accounts for about 25% of the total heat energy consumption. It is important to have an optimal hot water temperature – which is around 55 degrees (it should not be lower than + 50 °C to exclude the possibility of different bacteria forming in the heating system). It is also important that there is no losses of hot water, both in preventing leaks and in choosing water-saving taps;
  • in the summer without heating – in the summer season most of the time there is no need to heat the building, so heating may not be used during this period;
  • furniture layout – should not cover radiators with curtains or furniture. To keep the building warm, the air needs to circulate;
  • ventilation the heating season requires necessarily room ventilation. To allow fresh air to flow and do not create condensation, rooms should be cooled down for a short period of time and intensively. Before ventilation of the room, if possible, switch the radiator regulators. In cold weather, it is not desirable to keep open windows and balcony doors for a long time, nor should an open door in the stairwell and other common areas be kept unnecessarily;
  • sealed varieties – often with badly sealed windows, the floor is cold. When the windows and doors are sealed, entering of the cold air  in to the building is minimal;
  • Smart heating – in order to feel comfortable, there is no need to maintain the same air temperature in all rooms. Most people feel comfortable when the indoor temperature is between 18 and 23 degrees – the temperature can be reduced in the bedroom, kitchen, corridors, common areas and other areas where the stay is less frequent. Different air temperatures are also recommended at different times of the day – in the absence of all residents of a home, temperatures can be lowered. Reducing the temperature in the room by one degree reduces the amount of energy needed for heating by 5%.

Energy Efficiency Law

On March 3, 2016, the Energy Efficiency Law, amendments to the Energy Law and amendments to the Public Procurement Law, aimed at increasing the efficiency of production, transmission, distribution and final consumption of energy, was adopted at the Saeima plenary session. The purpose of the Energy Efficiency Law is the rational use and management of energy resources, promoting sustainable economic development and limiting the climate change.

The Ministry of Economics has developed the Energy Savings Catalogue to facilitate the accounting of energy savings resulting from the implementation of energy efficiency measures. The Energy Savings Catalogue includes separate energy efficiency improvement measures with the energy savings target standard values. These data can be used to calculate energy savings using the ex-ante method of foreseeable savings.