The Regional Development, Construction, Housing and Utilities Economy Ministry of Ukraine plans to change the requirements to the size of windows during construction of buildings, by singling four light climate zones instead of two, Deputy Minister Lev Partskhaladze has said.

According to the report, the changes will be introduced in the new national construction standards.

"In the new national construction standards for lighting we propose to adjust the calculations of natural lighting in the premises, in particular, to clarify the zoning of the territory of Ukraine according to the light climate, distributing it into four zones with light-climatic features, which will enable us to calculate the minimum area of windows required for rooms in different regions of Ukraine more correctly, and, consequently, will increase insolation and comfort in the premises," Partskhaladze wrote on his Facebook page.

According to him, now the territory of Ukraine is divided into two light-climate zones: one includes Odesa region and Crimea, the second - the rest of Ukraine, but the difference in time of sunrise and sunset between the western and eastern regions is about two hours.

According to Partskhaladze, the first light-climate zone will include Zhytomyr, Khmelnytsky, Ternopil, Rivne, Ivano-Frankivsk, Lviv and Volyn regions. The second zone will include Zakarpattia, Chernivtsi, Vinnytsia, Kyiv, Chernihiv and Sumy regions.

The third zone will include Kirovhrad, Dnipropetrovsk, Kharkiv, Poltava, Cherkasy, Donetsk and Luhansk regions.

Odesa, Mykolaiv, Kherson, Zaporizhia regions and Crimea will be in the fourth zone.