Does this mean I canât ever say âciao?â Of course the answer to this is no. Youâll hear ciao being said all over Italy â itâs an incredibly common greeting throughout the country. But if youâre paying closer attention, youâll see that itâs almost always used between people who know one another or are in the same peer group.
In building construction, a plenum (pronounced PLEH-nuhm, from Latin meaning full) is a separate space provided for air circulation for heating, ventilation, and air-conditioning (sometimes referred to as HVAC) and typically provided in the space between the structural ceiling and a drop-down ceiling.n buildings with computer installations, the plenum space is often used to house connecting communication cables. Because ordinary cable introduces a toxic hazard in the event of fire, special plenum cabling is required in plenum areas.
Report Abuse. The plenum is the duct right on top of the furnace. A furnace has 2 ducts. Cold air is sucked-in through the return duct. The air is heated in the furnace and pushed through the plenum, which is the duct on top of furnace.Tam22 Â· 7 years ago. Thumbs up.he plenum is the sheet metal box on top of the furnace that connects the furnace to the rest of the duct work.