PTC air heater without insulator Reliable, long life. appliances: room heater, bath room heater, air condition heater. PTC air heater without insulator. For more information about this product, please visit our website: 3w.tiancheng-ptc.com1) The power aging is excellent, the power changing is within 10% after 1000 hr. aging.2) Customers other dimensions are possible.3) Notice in appliance. The ...