Sustainable Building Technical Manual - Etn-presco.net

shading coefficient. A luminous efficacy of greater than 1.5 is excellent for daylightingapplications. New glass coatings being engineered, such as the spectrally selective lowemissivitycoatings offered by numerous glazing manufacturers, admit higher than 70percent of visible light while blocking nearly 95 percent of the infrared spectrum. 1 4 T h e s ecoatings may not be desirable, however, where passive solar heating is needed.❑ Consider switchable glazings.Although still in development and rather expensive, switchable glazings offer specialattributes and may be appropriate for special applications. The different types ofswitchable glazings are:– Photochromic glass. This light-sensitive glass darkens at a predetermined intensitylevel (like light-sensitive sunglasses).– Thermochromic glass. This heat-sensitive glass becomes translucent at a predeterminedtemperature.– Electrochromic glass. Electrically variable coatings become darkened with the applicationof current and clear as current is reduced.– Liquid crystal (LCD). This material becomes clear with the application of electricalcurrent and is translucent otherwise. Tints can be added to the liquid crystal films,giving them greater solar-control capabilities.I➜ R E S O U R C E SIAmerican Institute of Architects, Committee on the Environment. Energy, Environment &Architecture. Washington, D.C.: American Institute of Architects, 1991. Diverse anthologyof case studies of recent energy-efficient buildings, most of which feature extensivedaylighting systems.Caudill, W. W., and B. H. Reed. Geometry of Classrooms as Related to Natural Lighting andNatural Ventilation. Research Report 36. College Station, Tex.: Texas EngineeringExperiment Station, 1952. Graphically explores a range of effective daylighting solutionsfor educational buildings and discusses basic daylighting principles.Evans, Benjamin H. Daylight In Architecture. New York: McGraw-Hill, 1981. A basic primerfor building designers on visual quality, human-health aspects of natural light, andphysical-modeling methods for simulating daylighting solutions.Hastings, S. R., ed. Passive Solar Commercial and Institutional Buildings: A Sourcebook ofExamples and Design Insights. International Energy Agency: Solar Heating & CoolingProgramme. West Sussex, England: John Wiley & Sons, 1994. An extensive look at currentenergy-efficiency strategies with many excellent case studies primarily of recentEuropean buildings.Hopkinson, R. G.; and J. D. Kay. The Lighting of Buildings. New York: Praeger, 1960.Typically considered the “bible of daylighting,” this dated but still completely validtext is a must have reference and technical sourcebook for the daylighting practitioner.Illuminating Engineering Society of North America. Lighting Handbook. New York:Illuminating Engineering Society of North America, 1979.Illuminating Engineering Society of North America. Recommended Practice of DaylightingNew York: Illuminating Engineering Society of North America, 1979. A concise technicaltreatise on effective lighting with natural light.Libbey-Owens-Ford Company. Sun Angle Calculator. Toledo, Ohio: Libbey-Owens-FordCompany, 1974. A great and easy-to-use tool for calculating sun angles for the entireday and year for your location.Moore, Fuller. Concepts and Practice of Architectural Daylighting. New York: Van NostrandReinhold, 1991. This recent release includes some extremely useful performance characterizationmonographs for a wide variety of fenestration configurations and as someexcellent cost-benefit analysis models. Also included is a fairly comprehensive surveyon testing and monitoring equipment.Ramsey, Charles George. Ramsey/Sleeper Architectural Graphic Standards. New York: JohnWiley & Sons, 1988.