When it comes to the plenum area, “out of sight” must never become “out of mind.” Whether located under an elevated floor, such as in a data center, or above the dropdown ceiling of a conference room, ...

Q: We live in a two-story house that has recessed floodlights in the first- floor ceiling and have been told that we cannot add insulation to the second- story floors because of the floodlights. We ...

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 ...