The answer to 'difference between furnace and' is that a furnace is a central heating system that uses natural gas, propane, or electricity to heat air and distribute it through ductwork, while a boiler is a central heating system that uses hot water or steam to heat the home. Furnaces are generally less expensive to install and operate, but boilers can provide more even, comfortable heating.
Furnaces use a blower to push heated air through vents and registers in the home, while boilers circulate hot water or steam through radiators or baseboards. Boilers are often more energy-efficient, but furnaces can heat a home more quickly. The choice between a furnace and a boiler depends on factors like the size and layout of the home, local climate, and personal preferences.