Boilers are the heart of the heating system. Heating fluid (usually water or steam) starts with the boiler and ends with the boiler. The piping and radiators and/or floor heating all carry the fluid from the boiler through the house and back to the boiler. It’s a Boiler – not a Water Heater Boilers and water heaters are two different devices. Water heaters heat water for domestic hot water usage to your temperature setting (which is typically not more than 120-130°F to prevent scalding), and then provide your house with hot water. This is the hot water that comes out… Read more »