REHAU hydronic radiant heating and cooling systems reduce energy consumption, enhance thermal comfort, and support long-term health of commercial and multifamily buildings and occupants. These systems work by circulating heated or cooled fluid through a network of RAUPEX cross-linked polyethylene pipes installed in the floors, walls or ceilings. Due to the energy efficiency of hydronic energy transfer, radiant systems can lower heating and cooling energy costs by up to 30 percent and allow the air-handling systems to be downsized. By controlling the radiant temperatures of a space — a thermal comfort variable not influenced by forced-air alone — radiant systems provide even, gentle heating and cooling that measurably increases comfort. 800-247-9445; www.rehau.com.