ZEMCH 2019 International Conference Proceedings April.2020 | Page 15
2.1.2. Thermal performance of windows with attached glazing
Mock‐up experiments were conducted to quantitatively analyze the effect of improvement of the
thermal performance when the attached glazing is installed on windows. Before and after applying the
glazing, the thermal performance of windows was measured. The performance improvement was
analyzed through comparison with two measurement values. Five different windows were selected as
test specimens.
Table 2. Standard for thermal performance for windows
Standard
(nation)
Energy standards
and labeling
program for
windows [4]
(Republic of Korea)
Guidance on
providing
information about
the thermal
performance of
windows, etc. [5]
(Japan)
Grade U‐value
(W/m 2 K)
1
Standard
(nation)
Grade U‐value
(W/m 2 K)
U≤ 1.0 A U≤ 1.5
2 1.0