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.
Heater Cap is a heating system that gently heats the ice and snow coming off of your roof. The system uses a combination of heat disbursement panels and self regulating heating cable. The heating panels melt the ice and snow while a relay of heating cables keep the water melted and flowing through the gutters and down spouts.