TESI JOIN steel radiator tubes are arranged vertically in two rows and have a circular cross section with a diameter of 25 mm. A feature of the radiator is the symmetrical and mirror arrangement of the front and rear row of tubes, which created the effect of weaving. Valves for connecting to the heating system are standard equipment on the heater. The IRSAP TESI JOIN designer radiator is part of the TESI radiator collection. Radiators of this collection have a classic appearance and can be installed in central and individual heating systems.