The international airports in Pennsylvania are Lehigh International Airport at Allentown, Erie International Airport at Erie, Harrisburg International Airport at Harrisburg, Philadelphia International Airport at Philadelphia,
Electric Plenum Heaters. A plenum heater is an electric resistance heating device that is installed in the plenum, which is the spot in the ductwork system where ducting and furnace join. Air is heated as it flows across electric elements and then is distributed through the existing ductwork.
Knauf Insulation Rigid Plenum Liner with ECOSEÂ® Technology is a heavy-density mat-faced glass mineral wool board insulation bonded with ECOSE Technology.Its base board is brown with a black mat facing to give the airstream a smooth, tough surface, that resists damage during installation and operation.igid Plenum Liner with ECOSE Technology is specifically designed as an interior insulation material for heating, ventilating and air conditioning plenums and sheet metal ducts.