The R-6 DucTite® insulator is designed for use with the 602 DucTite residential register boxes. The insulator has R-6 insulating properties in compliance with ASTM C-578 standard specifications for preformed, cellular polystyrene thermal insulation. The R-6 thermal resistance calculation is based on 1.5-inch wall thickness with a density of 1.35 pounds per cubic foot. It is made of molded expanded polystyrene (EPS) that contains a flame retardant tested and classified by Underwriters Laboratories Inc. The unit can be used in type V construction, in nonfire-rated assemblies, and where the total material does not exceed 13 pounds per square feet of area. This product is not intended for use in an open or common return-air system, the manufacturer says.

M&M Manufacturing Co., P.O. Box 163409, Fort Worth, TX 76161-3409; 817-336-2311; 817-870-2934 (fax);;

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