To avoid solar heat gain and the glare from direct Sun, limit windows on the east and west side of a building.Ī zero-net-energy office building requires wrapping the entire building, including the above-grade walls, with a continuous (CI) layer and air and moisture barrier, as mandated by the ASHRAE 90.1 and the 2018 IECC, increasing the envelope's effectiveness ensuring a comfortable indoor environment.Minimizing windows on the cold, shaded north parts of the building saves energy.These windows further allow natural light to bathe the office space throughout the day, reducing artificial light's need and improving the workers' indoor environmental quality. ![]() The windows also need overhangs, providing shade in the summer and sunlight in the winter. Maximizing windows on the south side of an office building takes advantage of the sunlight during the day.A north-south orientation of the building minimizes direct sunlight during the summer (which lessens cooling demands) while maximizing daylight during the winter (which reduces heating demands).Specifically, an office building's orientation on its site and window placement should take advantage of the Sun's energy by maximizing or minimizing solar gains. Passive solar design works with nature, resulting in lower energy bills.
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February 2023
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