Zip 403552 is an instant on-wall boiling water heater that provides convenience, energy efficiency, and safety for various applications. With a 3-liter capacity, this compact unit delivers boiling water in just 16 minutes (when the inlet water temperature is 15°C) and features Steam-Heat-Boost technology to save energy by pre-heating incoming cold water. Its user-friendly design includes a two-way classic tap with fingertip control for filling cups and a lock-on function for hands-free filling of pots.