ORIGINAL ARTICLE
Ventilation Performance After Apartment Building Thermo-modernization
1
Students’ Scientific Society “Heat Engineer” at Bialystok University of Technology, Bialystok University of Technology, Bialystok, Poland
2
Faculty of Civil Engineering and Environmental Sciences, Department of HVAC Engineering, Bialystok University of Technology, Bialystok, Poland
Submission date: 2025-09-24
Final revision date: 2025-10-29
Acceptance date: 2025-11-24
Online publication date: 2025-12-12
Publication date: 2025-12-12
Corresponding author
Andrzej Gajewski
Department of HVAC Engineering, Bialystok University of Technology,, Wiejska 45E, 15-351, Białystok, Poland
Department of HVAC Engineering, Bialystok University of Technology,, Wiejska 45E, 15-351, Białystok, Poland
Civil and Environmental Engineering Reports 2025;35(4):228-249
KEYWORDS
TOPICS
ABSTRACT
Increasing requirements for reducing energy consumption result in ther-mo-modernization of the existing buildings. Modernized buildings have significantly lower heat transfer coefficient; simultaneously the infiltration through the windows slows markedly, which may deteriorate indoor air quality (IAQ) seriously. The measurements are done in a lodging room of a three-room dwelling in a sixty-year old building after thermo-modernization; one gauge with a vane probe measures the air velocity and tem-perature at a grille in the toilet; second gauge with IAQ probe located in this room measures the mole fraction of carbon dioxide, air temperature, absolute pressure, and rel-ative humidity; moreover there are estimated the uncertainties of: the volume flow rate, mole fraction of CO2, temperatures, and humidity. Heating system ensures thermal com-fort during heating season; despite of proper ventilation performance in the toilet the IAQ in the logging room is low, for vapor condenses on the window; carbon dioxide concen-tration is too high, which curbs mental activity greatly.
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| eISSN: | 2450-8594 |
| ISSN: | 2080-5187 |
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