Assessing the airtightness performance of container-like buildings in relation to its effect on energy efficiency

Bekboliev, Mirbek
This study analyzes the effect of airtightness on the energy efficiency of single and adjacent containerized buildings, before and after refurbishment. It further gives an overview of air leakage problems found in the sample of prefabricated buildings manufactured and located in Turkey. The air leakage of standard container-like building depends on a number of factors like the age of the building, manufacturing quality and quality of assembly implementation. The airtightness of four typical containerized buildings has been measured. The fan pressurization method has been applied and carried out with the Minneapolis Blower Door test and complemented by Infrared Thermography Camera screening to document all leakages within the building envelope. All building energy simulations have been performed with WUFI Plus to investigate the outcome of the respective air leakage of the building obtained from site. Following that, retrofit measures have been applied on one of the sample buildings. Test and simulation procedures have been repeated after retrofit to compare results. The post-retrofit simulation results of the four buildings show that poor airtightness has a negative impact on the energy performance of the building. This information is crucial for the future development of improvement measures in manufacturing prefabricated buildings.