The essence of hot water is that you first buy cold water from the water channel, and then the boiler heats it up. That is, the boiler does not buy water, but only provides heating services.
Dear wise man from the heck, look at the receipt for payment - and wonder why this cold water (by counter) is cheaper than hot (by counter)? Heating is included in the cost of the service. And if you miss the lechus - it's only your problems, but not the residents.