Blower Door를 이용한 건물의 기밀성능 시험 방법의 고찰

Abstract

The airtightness of a building is one of the main factors that affects both the energy performance and the indoor air quality. Fan Pressurization/Depressurization Test using blower door system is the most commonly used method of measuring a buildings’ air tightness. The fan pressurization method was established based on ISO 9972 (KS L ISO 9972)-Thermal performance of buildings-Determination of air permeability of buildings. ASTM E779, CGSB 149.10 and EN 13829 are the other standards used to measure the building air tightness. The basic theory and technique for the definition of the building airtightness using these standards is similar However, test pressure condition range, the correction of the result value and the air leakage rates reporting techniques are different. In this paper, the basic principle, requirements and limitations of these standards are reviewed. The weather conditions for test to eliminate the pressure difference due to wind pressure and indoor/outdoor temperature variations to obtain an accurate airtight performance is reviewed. Similarly, the pressure difference correction method such as “zero-flow pressure difference” for accurate measurement of pressure difference in each standard are described. Pressurization and depressurization methods are used in measurement to eliminate the discrepancy between the two. However, in case the case that only one of the methods is used for airtightness measurement, the results may deviate from the actual airtightness performance of the building components. Likewise, the airtightness performance of building components for domestic high-rise buildings were analyzed through the review of previous research results and the performance compared with the those of similar buildings overseas.