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RESISTO high-performance reflective insulation products effectively reduce energy costs through their use of radiation heat transfer. This phenomenon occurs when the infrared heat of a hot surface is transferred to a cold surface through an air space. Radiation thus comes into contact with any type of material and is then diffused, absorbed or reflected. For example, air, water and glass diffuse visible light to varying degrees, while a white surface (like snow) reflects it, and a black surface absorbs it.