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Daylight in buildings is evaluated using the daylight factor DF [%], which is defined as the ratio of the light level inside a structure (Ei = illuminance due to daylight at a point on the indoors working plane) to the light level outside the structure (Eo = simultaneous outdoor illuminance on a horizontal plane from an unobstructed hemisphere of overcast sky). The illuminance values are calculated for the overcast winter sky with Eo=5000 lx. In the Czech republic (and many other European countries), the daylight ...

Neighborhoods of standardized concrete block buildings form a significant part of the post-socialist build heritage. It is very important to renovate the houses to suit the needs of the current user. The reconstructions typically affect the apartment layout (e. q. uniting the kitchen with the living room, bathroom renovation) and also the indoor environment (thermal insulation, window replacement, installing air conditioning units). One of the alterations that has a major impact on both the apartment layout and th...