Studies, plans and programmes



In accordance with current Building act, prior  to  preparing  the  main  design  for  a  building  that  must  comply with the energy performance requirements,  the  designer  shall  prepare  a  Study  on  alternative  energy  supply systems and submit it to the investor.

For buildings having a useful floor area of 50 m² and more, that must  comply with the energy performance requirements and are heated to ≥ 18 °C indoor temperature, cost effectivness of alternative energy supply systems based on decentralized renewable energy systems, remote/block heating and/or cooling must be explored, particularly if based on renewable energy, the cogeneration systems and heat pumps. The study is mandatory annex to the main design documentation and must be available for verification to the relevant authorities.



Technical Regulation Concerning Energy Economy and Heat Retention in Buildings (Official Gazette 97/14, 130/14), brings many changes in the area of building construction, especially when it comes to designing, building and technical equipping of buildings and their energy efficiency.

This technical regulation prescribes:

- technical requirements regarding the rational use of energy and thermal protection, technical systems of heating, ventilation, cooling, air conditioning, domestic hot water and lighting to be met during design and construction of new buildings and the use of existing ones which are heated to indoor temperature more than 12 °C
- technical requirements regarding the rational use of energy and thermal protection to be met when designing the reconstruction of existing buildings which are heated to indoor temperature more then 12 °C
- other technical requirements for the rational use of energy and thermal protection in buildings which are installed in in order to meet the basic requirements for the building (energy and heat preservation)
- contents of the building design in relation to the rational energy use an thermal protection
- energy performance of buildings identification cards content
- maintenance of buildings in relation to the rational use of energy and thermal protection


With this Regulation, Directive 2010/31/ EU on the energy performance of building is implemented in Croatian legal system in part relating to:

-the minimum requirements for the energy performance of new and existing buildings, in which major renovations are carried out
-the minimum requirements of building elements forming part of the building envelope and technical systems of the building, while being built, changed or modernized
-need for studies on technical, ecological and economic applicability of alternative energy supply systems for new buildings



Life cycle analysis (LCA) uses assessment methods to determent the impact of a particular product, process or activity on the environment. LCA looks at all or more phases of the product life cycle, taking into account the different influences of these phases on the environment. Results are assessed, analysed and interpreted to give answers on:

- product design
- what kind of raw materials to use
- what energy sources to use
- packaging
- waste management
- relevant environmental impact indicators
- marketing strategy
- etc.



In accordance with Directive 2010/31/EU of the European Parliament and of the Council of 19 May 2010 on the energy performance of buildings, it is necessary to set minimum requirements on the energy performance of buildings in a way that cost-optimal levels are achieved. Cost-optimal level is defined as the level of energy performance that provides the lowest cost over the estimated economic life of buildings. Investment costs related to energy, maintenance and labour (including the cost and energy savings, building category and energy production profit) as well as estimated economic life of buildings if available, should be taken into account.



Investment project planning, among other things, includes Prefeasibility study. It's a study based on analytical documentation for pre assessing investment options in order to choose best ideas and to prove economic value of the project. This will enable successful implementation and reduce risk. Based on this data, clients will be advised on how to improve upon project designs and what elements to include for insuring cost effectiveness. Recommendations are aimed at finding additional sources of funding or reduction of investment costs.



Feasibility studies with cost-benefit analysis are being made for cities, municipalities, ministries and agencies, universities, schools and other institutions that require them as part of the project documentation for the realization of project co-financing. Feasibility studies with cost-benefit analysis are based project design documentation, cost estimate of preliminary design and cost estimate made on the basis of the main project.



Energy Efficiency Action Plans (Action plan) are being prepared by local (regional) governments and big cities. The purpose of the Action plan is to determine the guidelines for the implementation of policies to improve energy efficiency through energy savings, while taking into account the energy needs of the local government and the principles of sustainability and environmental protection. The adoption of the Action Plan is the the obligation under the Energy Efficiency Act.



The Sustainable Energy Action Plan is a key document that uses data on current energy situation and identifies measures for implementation of energy saving and energy efficiency measures, using renewable, eco-friendly energy sources and fuels. The Action Plan should in all its aspects be in agreement with the institutional and legal framework of the EU, national and local level. SEAP is implemented for a specified time period.

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