Far Infared Ray Pads & Wellness The Far Infared Ray (FIR) pad heats up to 130 degrees but can be used at a lower heat with benefits. The pad emits 2-3 microns of infrared, the dome emits 9-11 microns.   To find out more about the FIR Pad and for special BRenewed discounts when purchasing the FIR pad click here.