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-200% 26% Progress in reading among students due to daylighting Sources: (absenteeism) independent studies from Lockheed Martin in California and ING Bank in the Netherlands; (turnover) study from Story County (Iowa) Human Services; (eyestrain, headaches and drowsiness) Department of Design and Environmental Analysis, Cornell University, “Worker Reactions to Electrochromic and Low-E Glass Office Windows;” (in schools)Heschong Mahone Group, “Daylighting in Schools: An Investigation into the Relationship Between Daylighting and Human Performance.” How can glass and glazing cut down HVAC and lighting costs? HVAC systems account for about 40 percent of total energy use in commercial buildings, according to the Department of Energy. Meanwhile, lighting systems capture about 16 percent of electricity costs. Building owners can offset costs in both areas through the use of high-performance glass and glazing products, and by maximizing natural daylighting. ....
High Performance This guide on All That Glass Can Do begins with a closer look at thermal and energy performance. When it comes to glass, the top demand from owners and designers are systems that allow projects to feature large expanses of glass while meeting energy code requirements. Energy code requirements The national energy codes are becoming more stringent, cycle after cycle, according to Tom Culp, owner of Birch Point Consulting and energy code consultant for the NGA. Culp describes it as a rough “zone shift” in each updated edition. “Every three years, in our normal work at ASHRAE, IECC, California Title 24, we see steady advancement and uptake in energy-efficient technologies while also being practical and cost-effective,” he says. ....
Pioneering Framework Could Reduce Energy Demand in Buildings Heating and cooling buildings is a large part of global energy demand and a significant source of CO2 and greenhouse gas emissions, and in the coming decades the energy demand for heating and cooling – also known as thermal energy – is expected to grow considerably. Scientists and engineers have made many advances in lowering building energy demand by improving energy efficiency in building technologies and reducing energy loss through the building walls and windows. Now, researchers are concerned that simply tackling the problem through energy-efficient technology and design will reach its practical limits. So researchers from Lawrence Berkeley National Laboratory (Berkeley Lab), the National Renewable Energy Laboratory, and UC Berkeley have pioneered a new framework that determines the minimum thermal energy required to keep building occupants comfortable. ....