REHAU announces its new Web application, REHAU Radiant Calculator, designed to provide contractors and wholesalers with a quick material estimate for different types of radiant heating installation methods. Intended for use by hydronics experts already familiar with sizing pumps, boilers, controls and manifolds, the calculator estimates the requirements for REHAU radiant floor heating pipe and installation materials based on simple heated area inputs. Features include an easy-to-use interface, English and metric units, instant calculations, and print and email outputs. The calculator automatically scales for use on mobile and desktop devices.