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A study by the National Association of Home Builders (NAHB) Research Center has found that heating a home with ceilingmounted radiant panels can use 33% less energy than a heat pump, and 52% less energy than electric baseboards. The research project, completed in May 1994, was cosponsored by the U.S. Department of Energy, and SSHC Inc., maker of the Enerjoy panels used in the tests. Tests were conducted in a Maryland house equipped with radiant panels and a twozone forced-air heat pump. Two employees of the NAHB Research Center lived in the house and used the two systems at specified times during the heating season. Data for electric baseboards came from a previous test in the same house. While it's hard to generalize from the results of one test, this study shows that in