The answer to 'boiler or boiler' is that a boiler and a furnace are both central heating systems, but they use different methods to heat your home. A boiler uses hot water or steam to distribute heat, while a furnace uses forced air.
Boilers are generally more efficient and provide more even heating throughout the home. They also tend to last longer than furnaces, with lifespans of 15-30 years compared to 10-15 years for furnaces. However, boilers can be more expensive to install and repair. Furnaces are often a more affordable option, especially for smaller homes or those with existing ductwork.