It’s like our brain is sitting in traffic a few hours a day while trying to transform thoughts into written text. Lightkey is Israeli Company with strong focus on Machine Learning, AI and increasing Productivity by reducing key strokes and gaining time for end users.Īccording to their CEO Guy Katabi it appears that while we’re able to form thoughts at a rate of over 1,000 words per minute, most of us type at approx. The WFR value must be multiplied by the value of the Visible Light Transmission of the chosen glass (VLT), explained below, to ensure that the design moves within the thresholds that ensure certain effective levels of visual comfort (usually a value above 0.15).Do you also to type a lot of Emails, Microsoft Teams Chats, Yammer Postings, write Word Documents, paint PowerPoint Slides, work on Excel Sheets, reply to LinkedIn Messages – and use your same common phrases over and over? It can also guide things like the openings' size, location, and type of glazing. In some countries, like France, it is mandatory to have at least a WFR of 17% for all new residential buildings. This factor helps define the number of openings that will work effectively in each space of our project. The calculation of the relation between the area of the openings and the area of the space is called Window-to-Floor Ratio (WFR) and is obtained by dividing the total area of the openings by the total area of the space associated with them. Image Courtesy of Saint-Gobainĭaylight autonomy is determined by location, orientation, windows shade and position as well as Window-to-floor ratio and Visible Light Transmission of the glazing. The following aspects are fundamental to achieve an effective balance between all these variables:Ĭonsider the relationship between openings and space: Window-to-Floor Ratio Save this picture! Illustrations by Elisa Géhin. The Daylight Autonomy (DA) must then be calculated, which is the percentage of annual daytime hours in which a specific point in a space is maintained above a certain level of illumination, set by the user. The new European Standard for Daylighting EN17037 states that the following criterias should be met (minimum requirements for Spatial Daylight Autonomy): illuminance of 300 lux over 50% of space during more than half of daylit hours and illuminance of 100 lux for 100% of space more than half of the daylit hours. ![]() In order to evaluate the quality of the light, the Useful Daylight Illuminance (UDI) must be modeled first, which integrates the evaluation of the daylight levels and the glare, setting as an acceptable range the values that move between 1 lux. To evaluate the quantity of light, the distribution of light in space and the Illuminance should be measured at specific and relevant points for the functions that will be carried out in the room. Important changes in light levels or sharp contrast (which is perceived as glare) can cause stress and fatigue as the human eye is permanently adapting to light levels. Įvaluate the quantity and quality of light People do well with clear views to the outside, so it’s also fundamental to perfect the quantity and location of the openings in the building envelope in order to control natural light intensity.īoth too little and too much light can cause visual discomfort. Other things that are vital to consider include representations of color, low reflection, and uniform distribution of light. Things like the rate of blinking, level of glare, or light blindness help to determine the environmental quality of a room. The absence of discomfort at the time of seeing is not enough to measure the visual success of a space. ![]() But, do we know how to handle it correctly? ![]() Natural lighting –and how it should be complemented with artificial lighting– is an essential factor to consider for the visual comfort of interior spaces. Sustainability and Performance in ArchitectureĪrchitects are increasingly aware of our influence on the well-being and good health of the users of our projects. The Future of Architectural Visualization
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