Reliable 4100IS 2.2L Professional Steam Iron Station with Eco ModeIntroducing Eco Mode in the all new 4100IS steam iron station. Eco Mode will save you up to 33% in energy costs by reducing the energy consumption when the boiler is not being used. Smart for your wallet and smart for the planet. The 4100IS has an absolute capacity of 2. 2L, uses our new external heating element system to optimize the amount of steam available to use and has an operating pressure of 3. 5 bar 50 P. S. I. for maximum ironing efficiency.