Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.
Above is called a “on demand unit”, a tankless coil for a hot water boiler uses a spiral coil of copper that is bolted into your boiler, with the hot combustion gases heatintg the coil of copper that has the domestic cold water flowing thru it, heating the cold water into hot water as it travels to your faucets.
