Install it right! Perimeter heating and cooling produce the highest degree of comfort in a single duct system, but you must install ducts correctly to avoid excessive moisture or heat loss. Manual 4 combines the practical recommendations of ACCA contractors experienced in installing ducts in or below a ground slab and in crawl spaces, including 50 illustrated techniques.

• Basics of site preparation, materials, insulation, and moisture control
• Performance characteristics and types of perimeter air distribution systems
• Duct materials and material performance
• Vapor barriers
• Concrete slab and crawl space construction details
• Below grade, crawl space, and basement duct system installation details