Plenum chamber water drain valve Plenum chamber water drain valve is a valve used on some vehicles to drain collected condensation from the intake plenum.
Plenum The area between a false ceiling and the true one in most commercial buildings. Used to circulate heating and cooling air; its sometimes
Plenum-rated cable Plenum-rated cable that has been burn-tested to make sure it does not emit toxic fumes or large amounts of smoke when incinerated.