The answer to 'difference between furnace and' is that a furnace and a boiler are two different types of home heating systems. A furnace uses forced hot air to distribute heat throughout the home, while a boiler uses hot water or steam to heat the home. Furnaces are more common in North America, while boilers are more common in Europe and other parts of the world.
Furnaces are generally less expensive to install and operate than boilers, but they may not be as energy-efficient. Boilers can be more efficient, but they can also be more expensive to install and maintain. The choice between a furnace and a boiler will depend on factors like the size and layout of your home, your climate, and your budget.