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.
Thermal Fluid Heaters. Heatec specializes in thermal fluid heaters, especially those with helical coils heated by fired burners. They are extremely versatile and used in a wide variety of industries. They are also known as hot oil heaters. Oil and gas producers know them as HMO (Heat Medium Oil) heaters. In any case the burner heats the thermal fluid that circulates through the heater coil and through heating coils in other equipment. A single heater can heat multiple pieces of equipment connected in one or more thermal fluid circuits. Moreover, heating of each piece of equipment can be controlled independently by valves that modulate the flow of the hot oil through the equipment. Heaters with two-pass helical coils are the most popular.