New insulated duct sleeves come in two sizes and new duct wrap insulation comes in 60-square-foot sheets. These products are designed for use in both new and existing ductwork. The duct sleeves are available in 5-foot lengths of 6-inch diameters or smaller and 8 inches in diameter or smaller, says the company. They slide over round or rectangular ductwork before installing each piece. For existing ductwork, they can be cut open and wrapped around each piece. The duct wrap can be loosely wrapped in overlapping turns to insulate virtually any configuration, says the company. All these products offer an R-value of 6.
LL Building Products, 295 McKoy Rd., Burgaw, NC 28425; 800-755-9392 or 910-259-6374; 910-259-7428 (fax); www.llbp.com.