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.
A Goldair 1800W ceramic heater. A ceramic heater as a consumer product is a space heater that generates heat using a heating element of PTC (Positive Temperature Coeffient) ceramic. Ceramic heaters are usually portable and typically used for heating a room or small office, and are similar to metal-element fan heaters. ceramic heater as a consumer product is a space heater that generates heat using a heating element of PTC (Positive Temperature Coeffient) ceramic.