PPG Issues White Paper on Energy Savings with 'Cool' Wall, Window, Roof Systems
March 22, 2011
PPG Industries' coil and extrusion coatings group has issued a white paper demonstrating the energy performance of buildings with infrared (IR)-reflective coatings on metal walls, window frames and roofs. The 12-page document, “Energy Savings in High-Rise Buildings Using High-Reflective Coatings,” summarizes an energy modeling study conducted by an independent energy and environmental analysis firm on prototype eight-story office buildings in 12 North American cities.
The company reports that the study showed that, when IR-reflectance for metal wall, window frame and roof coatings was increased from 5 percent to 70 percent, total building energy costs were reduced by 1 percent in cold-weather cities such as Boston, Chicago and Ottawa, and by up to 4 percent in warm-weather cities such as Mexico City and Phoenix. It also showed that cooling loads for prototype buildings were cut by 2 percent or more in cold-weather locales, and by as much as 7 percent in sunny climates. Size requirements for fans and air-handling units (AHUs) also were diminished by 3 to 7 percent.