The free, revised, 45-page Guide to Insulated HVAC Duct Systems (publication AH121) covers five types of fiberglass insulated air duct systems. The uses and benefits of each system are discussed in detail. Charts and graphs highlight performance data, and easy-to-follow installation instructions are included, with illustrations. Information on energy codes, standards, and specifications regarding their applicability to the different systems are contained in the guide.

North American Insulation Manufacturers Association (NAIMA), 44 Canal Center Plaza, Ste. 310, Alexandria, VA 22314; 703-684-0084; 703-684-0427 (fax);

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