põhiekna

Põhiekna is an Estonian term that translates to "north window." In architecture and design, it refers to a window that faces north. The orientation of windows significantly impacts the amount and quality of natural light that enters a building, as well as its thermal performance.

North-facing windows in the Northern Hemisphere receive indirect, diffused sunlight throughout the day. This means they are not subjected to the direct heat of the sun, especially during the summer months. Consequently, north windows tend to provide a more consistent and cooler light, which can be beneficial for certain activities like artistic work or reading, as it minimizes glare and heat gain.

However, due to the lack of direct sunlight, north-facing windows can also lead to lower overall light levels and less natural warmth, particularly in winter. This can make rooms with only north-facing windows feel darker and colder. Architects and designers often consider the placement and size of north windows in conjunction with other orientations to achieve a balanced interior environment. In some cases, special window treatments or additional artificial lighting might be employed to compensate for the reduced natural light. The term is primarily used in discussions related to building design, energy efficiency, and interior climate control.