Validation report: cost-effective optimal technical solutions in the ComAct pilots

Validation report: cost-effective optimal technical solutions in the ComAct pilots

The availability of energy at affordable prices is among the key factors for achieving a sustainable development of the society. However, the production of energy and its use significantly affect the environment, resulting in local and regional pollution and leading to global climate change. The entire world faces the challenge of sustainable development – development that provides security of energy supply while reducing negative impacts on the environment.

Buildings of all types require a lot of energy to maintain design parameters and normal functioning. On the other side, this also gives the opportunity for large energy savings. Therefore, energy efficiency of buildings has become priority in both the public and residential sector, leading to significant energy and cost savings.

It is important to emphasize that energy efficiency cannot be considered only as energy usage reduction. Such reduction always involves certain sacrifices, e.g. inadequate inner temperature or inappropriate lighting, while efficiency means keeping the optimal inner temperature, indoor climate and lighting levels by using less energy.

Depending on the type of the proposed measure, increased energy efficiency can:

  • Reduce the burden on households as energy prices rise,
  • Increase energy security,
  • Increase the investment needed for energy supply,
  • Reduce air pollution and greenhouse gas emissions,
  • Expand employment in unskilled and skilled labour,
  • Reduce demands on national and municipal budgets,
  • Improve economic competitiveness.

Some of these measures can be easily implemented for most of buildings (e.g. replacement of lightbulbs), others are relatively complex (e.g. heat insulation of walls or replacement of windows), while few require significant investment and detailed analysis (e.g. introduction of heat pumps for heating, cooling and preparation of domestic hot water). Finding the optimal set of measures to be proposed for a specific building is a complex task, often analysing not only engineering aspects, but legal and behavioural as well.

The initial purpose of this document is to (a) provide an overview of energy efficiency and renewable energy measures proposed to ten pilot buildings in Bulgaria, Hungary, Lithuania, North Macedonia and Ukraine, and (b) provide an overview of measures implemented in pilot buildings, and (c) validate whether measures were correctly proposed and implemented.

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