Instantaneous water heaters, unlike boilers, have compact sizes and much greater power.
Unfortunately, it is not possible to instantly heat water with two kilowatts. Normal models of water ducts, which can be used to distribute hot water throughout an apartment or cottage, start at a minimum of 10 kW and above.
If you want to install a heater from 3.5 to 6.5 kW, keep in mind - this will only provide hot water in one specific place - for one sink or shower head.
Moreover, for the shower, such specimens come with their own watering cans. They have smaller diameter holes to artificially reduce the water flow rate (about 3 l/min).
If you're American, you might not even notice anything.
