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 ...
The ComfortPlenum™ consists of sealed, compact zone dampers built into a plenum. The unit requires less space in the attic, crawl space, or closet because the dampers are not mounted outside the ...
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