We answer the question: boiler vs water heater, what is the difference? Find out which one is better, boiler vs water heater., Understand the key differences between a water heater and a boiler, including how each system works and their best uses., A water heater can heat your water to 120 degrees Fahrenheit, and a boiler heats your water and home. Boilers can heat water faster than a water heater, and they are also less maintenance than water heaters., , , .