Abstract
Realization and exploitation of buildings involves in European Union about 40% of total energy consumption [1]. One of the elements of rationalization of energy consumption in buildings are the undertakings related with thermal modernization of buildings. The actions related with reducing the energy intensity of buildings are not always correlated with improvement of microclimate conditions in the rooms. Errors in the implementation of the energy efficiency program led to the phenomenon of sick building syndrome. The paper presents the results of the research conducted in a few educational buildings before and after thermal modernization. The research includes energy consumption for the heating of building and selected parameters of the interior microclimate. This analysis was carried out to evaluate the influence of energy saving activities on microclimate interior conditions. It was found that in many cases commonly used gravitational ventilation is not able to ensure the proper conditions of the interior microclimate, and the concentrations of carbon dioxide recorded in the tested rooms exceeded the applicable standards.
Highlights
The issues of thermal protection of buildings are directly related with energy savings and with other aspects
Buildings existing in Poland, both residential and public are characterized by a great potential in terms of energy efficiency
Attention is paid to the deterioration of indoor air quality in rooms in relation to the tightening of the thermal protection requirements of buildings associated with the energy efficiency program
Summary
The issues of thermal protection of buildings are directly related with energy savings and with other aspects. According to the European Union Directive on the energy performance of buildings [4], it is important to improve the energy efficiency of buildings, and to define the conditions for the classification of objects in terms of the indoor microclimate requirements. The energy saving activities focusing only on the insulation of building envelope and air tightness of fenestration joinery often results in worsening of the microclimate quality. The lack of thermal insulation in building envelope caused mainly that the buildings failed to comply with thermal protection requirements and were not energy efficient generating considerable energy losses. Thermal modernization of buildings consisted of insulation of building envelope and modernization of the heating system and hot water preparation
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