there is no way to hide heat, a/c maybe the only way but then u got an a/c running in winter..... Look at it like this. to hide heat u must contain it. You contian it by reflecting it and using materials that do not absorb heat. Aluminum foil might work. Also u have to take into account that u need to Air tight seal your room with this stuff. We could just be like arnold and use some mudd to trick the predetor.