Make Common Plenums More Common! Â by Erwin Platvoet Fired heaters need air for the burners that supply heat to the process tubes. Air is supplied through individual burner plenums or a common plenum. Most burners come with an individual plenum which means each burner has an individual air supply duct (called plenum or windbox)
Common Plenums: 5 reasons fired process heaters need them