ZEMCH 2019 International Conference Proceedings April.2020 | Page 16
Figure 5. Air infiltration rate of windows before and after the application of windbreak
Table 3. Change of airtightness grade of windows by application of windbreak
Standard Case 1 Case 2 Case 3 Case 4 Case 5 Case 6 Case 7 Case 8 Case 9
KS F 2292 3 → 2 2 → 1 3 → 2 4 → 2 2 → 1 6 → 2 4 → 2 3 → 2 3 → 2
DIN EN
12207 Class 1→
Class 2 Class 2→
Class 3 Class 2→
Class 2 Class 1→
Class 2 Class 2→
Class 3 Class 1→
Class 2 Class 1→
Class 2 Class 1→
Class 2 Class 2→
Class 2
A‐3→ A‐4 A‐4→ A‐4 A‐3→ A‐4 A‐3→ A‐4 A‐4→ A‐4 A‐3→ A‐4 A‐3→ A‐4 A‐3→ A‐4 A‐3→ A‐4
JIS A 4706
Table 3 shows the results of comparing the airtightness performance of windbreaks with domestic
and international standards.
In the case of domestic standards, all windows have improved the confidential performance by
grade 1 or higher, and there were also windows (case 6) which improved up to grade 4. In the case of
European standards, seven windows except two windows have improved the performance of grade 1
or higher, and all windows are rated Class 2 or higher. In the case of the Japanese standard, seven
windows except for two have been upgraded from grade A‐3 to grade A‐4. Although there are
differences depending on the application criteria and the performance of the windows, it is confirmed
that the application of the windbreak improves the airtightness performance grade of most windows.
3.2. Improvement effect of airtightness of windows by applying attached glazing
Thermal performance measurement results before and after application of attached glazing are
shown in Figure 6.
Figure 6. U‐value of windows before and after the application of windbreak
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ZEMCH 2019 International Conference l Seoul, Korea