A UL-approved fiberglass plenum box with ceiling radiation damper (CRD) is available in three model styles. The fiberglass plenum boxes are offered in 1- and 1-1/2-inches-thick rigid ductboard with ...
Description: These two products have been added to the automatic balancing damper (ABD) line. Model ABD-FD incorporates a UL 555 rated 1.5- or 3-hour static fire damper, flanged sleeve, an ABD, and an ...
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