Instantaneous water heater, hydraulically controlled, for supplying washbasin, kitchen sink, shower or bath tub. Heat exchanger made from glass fibre reinforced polyamide, internal indirect coils immersed directly in water. Output switching via differential pressure switch. Safety shutdown via pressure limiter. Output switching with 2 automatic and 2 manual output stages for 1/3, 1/2, 2/3 and 1/1 of the maximum output. Universal water connection for remote and direct draw-off. For connecting to VPE plastic pipes with DVGW test mark. Oversink installation. With installation template. Quality and safety symbols: CE mark, VDE / GS symbol, EMI symbol / EMC.