This product is made up by stainless steel gutter frames, without any additional external water storage thanks to a special lower gutter, which serves as a tank. This innovative system is easy to install, permits to avoid all costs related to external tank with additional pipes. The lower gutter although with the same design of the traditional one. Has become deeper in order to contain the correct amount of water required by the system to operate. MDFX is appriciated not only by customers, but also by installers, maintenance workers and end-users for the simplicity and flexibility that distin-guish it.