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.
Plenum Rated Unit Heaters. Plenum Rated Unit Heaters Are Used In Concealed Areas Of High Rise Commercial Buildings, Concession Stands, School Bathrooms, Large Lobbies, Foyers Or Entrance Ways And More. Plenum Rated Unit Heaters are constructed of rugged powder coated steel for long lasting durability and reliability. Use to pre-heat outside air.