Do Polish bathrooms tend to have an instant water heater installed in the bathroom like much of Europe? American homes have one main heater, often far from the bathroom. I have to run my shower for nearly a full minute before I get any hot water. A warm water tap that isn’t in constant use won’t get warm using the amounts of water a bidet requires. We need a power supply that can heat the water either a tank in the bidet or on demand. That power supply is uncommon here.