Radiation is the most efficient method of transmitting of heat . The heated bodies emit electromagnetic waves which travel without any media, and when they fall upon any object they release their energy onto that object. The intensity of these radiation depends upon the temperature of the heated object. Using the same principle our Radiant tube heater uses L.P.G / C.N.G to heat Metal tubes , which inturn heat the desired object with highest of efficiency. The surface temperature for Radiant tube or Penal can be achieved between 250 to 1000°C.