The extraordinarily hot and humid summer 2018 is a very tough test for HyWin. Even with outside temperature of 35°C and full sun exposure over a large part of the day, the temperature inside the HyWin cavity is maintained at the desired room level of around 22-23°C.
The high outside temperature also simulates the presence of internal heat sources, such as computers or people, since in the test unit the “inside” window is actually exposed to the high external temperaures. HyWin fully absorbs, as expected, the heat that enters through the “inside window”.