The Mechanical Contractors Association of America will hold its first green-building conference, “Catching the Next Wave: Seizing the Green Opportunities that Lie Ahead,” Sept. 24-26, in Milwaukee, WI.  The three-day event includes seminars, a green building products showcase and a tour of Johnson Control’s headquarters, which was retrofitted to LEED Gold status. For more information, visitwww.mcaa.org.