The performance ensures the distance how far the infrared waves can still be delivered in full. Because we all have different sensitivities, one should not exaggerate the intensity and try to choose the recommended distance between the IR emitter and the body.

Perfomance: Distance to: Recommended use:
200 W.   0 - 25 cm lower leg
350 watts   5 - 30 cm
back and legs
500 watts 10 - 50 cm
ideal for the back
750 W.
40 - 90 cm
laterally or frontally