District heating service

Utilitas supplies district heating to 5,000 buildings all over Estonia, including to 174,000 households in eight Estonian cities: Tallinn, Maardu, Keila, Rapla, Haapsalu, Kärdla, Jõgeva, Valga.

Our customers include apartment buildings and private residences, schools and kindergartens, office buildings and public office buildings, sports halls and swimming pools, shopping centres and hotels, hospitals and social care institutions.

Buildings consume thermal energy through heat substations which are usually located in the basement of the building. The substation receives thermal energy and distributes the energy in the building based on the temperatures and regimes set in the heat substation. In the heat substation, the owner of the building can determine the indoor temperatures of the rooms in the buildings and other required parameters. The amount of thermal energy consumed is measured with the help of the heat meter installed in the building.

All clients of Utilitas are connected to the remote reading system that helps to measure thermal energy consumption more accurately than before. A system equipped with constant data connection enables quicker detection of failures, losses, and leaks, and control over the operating of the entire thermal energy network.

Sisu Moodul

The thermal energy consumption of a building depends on the preferred indoor air temperature, the heat retention of the building, the efficiency of the settings of the building’s heating system, and the weather conditions.

Soojuse tarbimise joonis

the more thermal energy is needed to heat the rooms
the less heat is lost through walls, windows, the roof, etc
the more heat is consumed.

The amount of thermal energy consumed in a building is measured with the help of a heat meter installed in the heat substation. The amount of thermal energy consumed in a month is multiplied by the price of thermal energy to find the cost of the thermal energy consumed by the building. The bill of a building is divided into:

  • thermal energy used for heating domestic hot water;
  • the cost of heating is found by dividing the remaining thermal energy by the number of square meters of the heated surface area of the building

Depending on the energy class (heat retention) of a specific building, consumption habits, and outdoor air temperature, the amount of heat required to heat 1 m2 may double or even triple. On average, 0.130 MWh of thermal energy is needed to heat 1 m2 during the heating season (Oct–Apr).

Domestic hot water (i.e. heating cold water) consumes 35–40 per cent of the total amount of thermal energy used per year. During the heating season, it takes 0.05815 MWh to heat 1 m3 of cold water; outside of the heating season, it takes 0.04652 MWh. The amount of thermal energy used on heating water can be calculated based on the amount of hot water consumed by a specific apartment.

Read more about Utilitas district heating service in estonian version