REHAU has introduced the RAUPANEL system for radiant heating. Ideal for retrofit and new construction applications, the RAUPANEL system is lightweight, efficient and easy to install. Consisting of REHAU's 3/8" RAUPEX(R) cross-linked polyethylene (PEXa) pipe, aluminum panels and wood return bends, the system's low 5/8" profile has minimal impact on overall floor height. Featuring an aluminum-intensive construction, the RAUPANEL system provides excellent heat transfer characteristics, allowing for reduced water temperatures and more efficient operation. REHAU. Circle 17.