Application of energy efficiency in the building sector
The building sector has a huge potential for energy savings and has been identified as one of the most important in the area of energy efficiency improvement in Serbia. The biggest challenge will be to reduce energy consumption in residential buildings that account for 75 percent of all buildings.
Our country adopted regulations, performed the typology of residential buildings and trained experts in this field, which served as the basis for the introduction of the Central Register of Energy Passports (CREP). It is a software system in which energy efficient engineers enter data on energy certification of buildings and which allows monitoring the improvement of energy efficiency in buildings as well as sources of financing in this area. CREP is also a register of licensed energy efficiency engineers and organizations that are authorized to issue energy passports.
All new buildings, those that are being reconstructed, repaired, or energy renovated, according to the construction law, have an energy passport containing all the data on energy properties of the building. From 2015 to the beginning of 2017, more than 400 energy passports have been entered in the Register.
A new law on housing and maintenance of buildings is being prepared, in which it will be determined that energy efficiency is a public interest, which opens the way for local governments to allocate funds for this purpose, and housing communities to apply for competitions for energy renovation programs.
Why should the owners of residential buildings introduce energy efficiency measures?
Average annual consumption of heat in the majority of the existing facilities in urban areas in our country is significantly larger, even 2 to 3 times than in the new facilities.
These buildings that were built during the seventies and eighties of the past century, in the period of the most intensive development of the building sector, are characterized by excessive consumption of final energy and growth of heat consumption. Since these buildings are poorly built, when considering the aspect of energy efficiency, the thermal properties of their shells are very poor and further aggravated due to aging.
Let’s just mention a few shortcomings of most residential buildings:
* The absence or inadequacy of thermal insulation on the building, poor or worn out windows and doors,
* Oversized installations for the heating system, boilers or heat stations if the facilities are connected to the district heating network.
According to the Energy Sector Development Strategy Implementation Programme of the Republic of Serbia, the average specific final energy consumption for heating and domestic hot water production in Serbia is estimated at around 220kWh/m² per year, which is much more than the average in the European Union (below 80kWh/m² per year).
We list the most common measures that contribute to energy savings up to 75% in old buildings:
* Placing a modern thermal insulation layer on the walls
* Thermal insulation of the roof or intercity construction
* Replacement of worn out windows or installation of insulation tape on drafty windows or doors.
Thanks to these measures, the owners of old houses and apartments in old buildings can significantly reduce energy dissipation and the amount of their electricity bill, keeping all the existing comfort.
How can the heating and cooling bill be smaller than the one for cable TV and the Internet?
Robert Keler from Bečej has decided to apply energy efficiency measures in construction and to make an energy passport for his facility with an area of 112m². According to the obtained study on energy efficiency – that is the condition for issuing the building permit – quality insulation and sealing of the building on façade walls, attic, floors and foundation, and quality windows with triple glass were installed. Thus, a heating boiler of only 2.7 kW was needed to heat the facility.
Benefits from these measures are multiple:
* Electricity bill for this house is lower than the costs for cable TV and the Internet
* Pleasant and uniform temperature in the whole facility with a temperature difference of 1°C
* There is no internal circulation of the air and no sense of draft
* With an energy passport, this residential building is worth more on the market
In order to use the knowledge of how to increase energy efficiency in the best possible way during the construction, it is very important to engage an experienced licensed energy efficiency engineer for the development of the necessary study.
The team of such experts, experienced in the development of energy efficiency audits, is at your disposal in a number of design bureaus, and we can assist you in selecting an expert for developing an elaborate if you send us an inquiry to email@example.com.
You can read the Rules on the conditions, content and method of issuing certificates of energy properties of buildings here.
Useful links: Ministry of Construction, Transport and Infrastructure