In my thesis, I analysed the renovation of Dobrovo Primary School in terms of energy
efficiency and indoor air quality. The school facilities are diverse, composed of cubes of
different sizes and heights. Given the time and the construction system, the whole school
complex can be divided into two major parts. The first part or the "old school"
(completion of building works in 1966) comprises two mutually perpendicular wings
where classrooms, offices and library are situated. The second part is the newer part (the
extension lasted several years and was finalised about a decade ago) which comprises
gyms, dining halls, kitchens and five classrooms. On the first part, only the remediation of
the thermal envelope of the building was carried out in 2014 whereas on the second part
also builders’ joinery was replaced, solar panels for heating domestic water and woodfuelled
biomass boiler were installed. However, the last two improvements introduced by
Dobrovo Primary School were not taken into account in the analysis since they have only
come into use in 2015. Moreover, both of these are also not included in the energy
The aim of the thesis is to present the results calculated using TOST software and
compare them with the existing legislation as well as the calculated energy performance certificate of the building. The aspect of indoor air quality had been analysed through a
survey among the employees which provided their opinion on the chosen quality
parameters before and after the restoration.
The results obtained with TOST software revealed that Dobrovo Primary School does not
meet the requirements of the energy efficiency. When comparing the values calculated by
TOST software and calculated values of the energy performance certificate, different
results are obtained. The values of CO2 deviate the most as they are more than twice as
high. Based on the survey results, it can be concluded that only minimal changes are
perceived in the quality of the indoor environment after the renovation. In order to obtain
results that would draw to a firm conclusion on the effects of rehabilitation on the quality
of the indoor environment, a detailed analysis would be required. In the future, the
opinion should be upgraded also with measurements of comfort parameters.
It is recommended to move the existing window frames to the level of thermal insulation,
to renew the heating system and hot domestic water preparation appliances, and to install
heat recovery ventilation system. In addition, it would be worthwhile fitting thermostatic
valve and replacing circulating.