District heating service

Utilitas supplies district heating to more than 4,600 buildings all over Estonia, including to 164,000 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. Last year, Utilitas completed an extensive project, in the course of which all of the company’s customers were connected to a new and convenient thermal energy remote reading system by the end of 2016.

Sisu Moodul

The remote reading system helps to measure thermal energy consumption more accurately than before. The availability of remote reading data to the customer will be developed in 2017. 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. It is also no longer necessary for customers to provide their meter readings every month. In the future, customers will be able to optimise the thermal energy consumption of their buildings based on more accurate thermal energy consumption data. A well-regulated heat substation helps to increase energy efficiency and lower heating bills. When the heat substations of buildings are intact, the network losses are also lower and, conclusively, thermal energy will be available for all at a lower price.

Advantages of the remote reading system:

  • Customers are not required to provide their meter readings every month
  • Decreases the amount of manual work and thereby the number of human errors in providing and processing information
  • Constant real-time overview helps to detect failures, losses, and leaks quicker and control the operating of the entire thermal energy network more accurately
  • Possibility to optimise the thermal energy consumption of buildings based on more accurate thermal energy consumption data

The remote reading modem consumes electricity and the remote reading devices must be connected to the power network at all times to communicate readings. In the event of short-term power cuts, the functionality of the device is ensured by the battery, but the thermal energy consumption data are also preserved in the event of longer power cuts. According to the technical specifications of the device, the annual power consumption cost of the remote reading modem is up to 1.5 euros.

Responses to customers’ questions and any further information can be obtained from Anna Joannesjan, Head of Thermal Energy Metering, by calling +372 610 7155 or e-mailing anna.joannesjan@utilitas.ee

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 COLDER THE WEATHER,
the more thermal energy is needed to heat the rooms
THE HIGHER THE HEAT RETENTION OF THE BUILDING,
the less heat is lost through walls, windows, the roof, etc
THE HIGHER THE INDOOR AIR TEMPERATURE,
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