Impact of technical systems efficiency and calculation method on evaluation of building energy performance and carbon emission

This work determines the influence of building technical systems efficiency and uses a calculation method for the evaluation of whole building energy efficiency and carbon emission. Two types of commercial buildings are considered: an office building and multifunctional building and these are examined by two methods to determine the efficiency of the building systems. The analysis was performed for two different thickness of pipes and ducts thermal insulation in a heat distribution system: according to minimum energy saving requirements and with doubled thickness. It was found that selection of the applied calculation method has significant impact on energy efficiency of building services evaluation and as a consequence – on the energy efficiency evaluation of the whole building and its emissivity.