Highlighting the purity of three simple geometric forms: squares, rectangles and cylinders, the Grohtherm F collection of thermostatic shower controls and coordinating accessories gives you the freedom to design your perfect shower. Based on GROHE Rapido T technology, the modular concept enables you to control one, two or multiple shower outlets, while the minimalist appeal of its design complements Rainshower® F-Series showers, Allure faucets and all GROHE Cosmopolitan-style ranges.