This Underwriter Laboratories-approved fiberglass plenum box with ceiling radiation damper is available in three model styles. The boxes are designed in 1 inch and 1.5-inch-thick rigid duct board with registers/grilles or drop duct applications. The units include the “I” model with sleeve without a plenum box, Model J for sleeve with knocked down plenum box or the K model, which is a sleeve with completely assembled plenum box. Each is available in standard sizes ranging from 8 inches by 4 inches and 16 inches by 16 inches. Knocked-down units can be assembled in the field and still be Underwriters Laboratories-approved, which the company says saves on shipping charges.
Lloyd Industries, 231 Commerce Drive, Montgomeryville, PA 18936; (215) 412-4445; www.firedamper.com.
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