This outdoor electric heater with a 4 kW heat output is a perfect addition to your home. The mesh screen contains tungsten's front cover that controls the infrared energy in order to maximize performance and spread the heat. Translucent-fused quartz consists of a thick steel coil that creates a high output element and emits a soft red glow. Mirror-finished parabolic specular reflector at the back side channels the lost infrared energy in the direction of the target.