Unico Inc. was to exhibit at the 2003 National Preservation Conference hosted by the National Trust for Historic Preservation in Denver Colo., Sept. 30 through Oct. 5. The conference theme was to be "New Frontiers in Preservation." More than 100 educational and field sessions were scheduled on topics including green architecture, anti-terrorism measures for historic properties, and gay and lesbian historic sites. Unico manufactures the Unico System, a mini-duct central heating and cooling system for older and historic homes. For more information, visit www.unicosystem.com.