Hi, Eric! Do you mean boilers for hot water radiators? If that's the case, then, yes that is a cheaper and cleaner way to heat your home. It requires less energy for the water to be heated and circulated through the radiators than for a forced air furnace to heat air and blower motor to circulate it through the ventilation. Because of the air blowing around the house, it makes the air dryer and blows dust and dirt around the house, too. But, because of the ease of having a central air conditioning system using the same system, it has become predominant in houses by and large for the last 50 years or so.
You will want to maintain the mechanics of your boiler the same way you maintain any kind of heating element, but because there are fewer moving parts, they tend to remain functional longer than forced air units. Make sense?