Editing Window covering (section)

=== Dynamic window coverings ===
Window coverings can be static or dynamic. Static window coverings are fixed in place while dynamic window coverings can change their status manually or automatically. Dynamic window coverings can control daylight and solar energy entering the building. Dynamic window coverings are effective in adapting to changing outdoor and indoor conditions. Optimal control of window coverings can increase occupant comfort (visual and [[thermal comfort]]) while saving building energy use (lighting, cooling, and heating energy).<ref>{{Cite journal |last1=Shen |first1=Eric |last2=Hu |first2=Jia |last3=Patel |first3=Maulin |year=2014 |title=Energy and visual comfort analysis of lighting and daylight control strategies |url=https://linkinghub.elsevier.com/retrieve/pii/S0360132314001322 |journal=Building and Environment |volume=78 |pages=155–170 |doi=10.1016/j.buildenv.2014.04.028 |bibcode=2014BuEnv..78..155S |issn=0360-1323 |access-date=2022-11-22 |archive-date=2024-06-26 |archive-url=https://web.archive.org/web/20240626195052/https://www.sciencedirect.com/science/article/abs/pii/S0360132314001322?via%3Dihub |url-status=live |url-access=subscription }}</ref> Typical dynamic window coverings include automated blinds and automatic shades.

Window blinds and shades can be controlled to avoid [[Glare (vision)|glare]] while introducing daylight to the building. The height of the blind and the angle of the slat can be determined by daylighting demand and solar positions ([[azimuth]], [[altitude]]). By controlling the height of shades or blinds, the optimal amount of sunlight can be introduced to meet the target horizontal [[illuminance]] (work plane illuminance). The optimal angle of the blind slats can protect occupants from direct sunlight (cut-off angle strategy). Glare can also be controlled by glare index-based models, such as discomfort glare probability (DGP).<ref>{{Cite journal |last1=Motamed |first1=Ali |last2=Bueno |first2=Bruno |last3=Deschamps |first3=Laurent |last4=Kuhn |first4=Tilmann E. |last5=Scartezzini |first5=Jean-Louis |year=2020 |title=Self-commissioning glare-based control system for integrated venetian blind and electric lighting |url=https://linkinghub.elsevier.com/retrieve/pii/S0360132319308558 |journal=Building and Environment |volume=171 |pages=106642 |doi=10.1016/j.buildenv.2019.106642 |bibcode=2020BuEnv.17106642M |issn=0360-1323 |s2cid=213357600 |access-date=2022-11-22 |archive-date=2024-06-26 |archive-url=https://web.archive.org/web/20240626194851/https://www.sciencedirect.com/science/article/abs/pii/S0360132319308558?via%3Dihub |url-status=live |url-access=subscription }}</ref>

Window coverings can be controlled to minimize overheating. When the sunlight is strong, fully closed window coverings can decrease the cooling load while maintaining occupants’ [[thermal comfort]]. When the outdoor temperature is extremely low, fully closed drapes or curtains can reduce the heating load.<ref>{{Cite journal |last1=Karlsen |first1=Line |last2=Heiselberg |first2=Per |last3=Bryn |first3=Ida |last4=Johra |first4=Hicham |year=2016 |title=Solar shading control strategy for office buildings in cold climate |url=https://linkinghub.elsevier.com/retrieve/pii/S0378778816301517 |journal=Energy and Buildings |volume=118 |pages=316–328 |doi=10.1016/j.enbuild.2016.03.014 |bibcode=2016EneBu.118..316K |issn=0378-7788 |access-date=2022-11-22 |archive-date=2022-06-16 |archive-url=https://web.archive.org/web/20220616224702/https://linkinghub.elsevier.com/retrieve/pii/S0378778816301517 |url-status=live |url-access=subscription }}</ref>

Control of window coverings can also be determined by occupants’ personal preferences. The occupant may prefer to close the window coverings due to privacy issues. Indoor conditions, such as furniture configuration or occupant position, may also affect the shade or blind control.

Dynamic window coverings are important in the area of [[building automation]].