26% 1O pts 5% 1O Pts UP TO higher sales price for homes with high environmental comfort(3) gain in academic performance when classrooms are better ventilated(4) productivity gain in betterdesigned spaces(1) DATA 28 29 The impact that our living environments have on our well-being and health also has direct repercussions in terms of performance and economic benefits. This tangible link has been the subject of numerous studies, which prove that a healthy and well-designed living environment results in concrete gains. Homes In the United States, research at the Massachusetts Institute of Technology (MIT) has shown that homes with better air quality, ventilation, material emissions, and natural light command a rental premium of 4% to 7% above comparable properties(2). In Europe, a recent study in Turin found that natural light has as much influence on house prices as surface area or floor space. The best-lit homes can command a premium of up to 26% in sales price and 21% in rent(3). Places of learning In schools, light and indoor air directly influence academic success for students and working conditions for teachers. Several studies show that increasing ventilation flow rates leads to an average performance increase of 5% in standardized assessments(4). Stabilized CO2 levels reduce drowsiness and improve concentration. Exposure to natural light is also a factor in academic success(4). (1) Ildiri, Bazille, Lou, Hinkelman, Gray, Zuo, Impact of WELL certification on occupant satisfaction and perceived health, well-being, and productivity: A multi-office pre- versus post-occupancy evaluation. Building and Environment, 2022. (2) Hano, Keitaro, The incremental value of smart buildings upon effective rents and transaction prices. MIT PhD thesis, 2018. (3) Loro P., Lo Verso V., Fregonara E., Barreca F., Influence of daylight on real estate housing prices, Journal of Building Engineering, 2024. (4) Heschong L. et al., Daylighting Impacts on Human Performance in School. Journal of the Illuminating Engineering Society, 2013. Offices A study published in Building and Environment(1) shows that very practical improvements in offices, such as better ventilation, more effective filtration, increased natural light, materials with low volatile organic compounds, and good thermal and acoustic comfort, result in an average increase of 10 points in employee productivity. In open-plan offices, the Center for the Built Environment (United States) has shown that a 10 dB reduction in ambient noise can improve concentration by 30%. Well-being in figures
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