The Differences between Boilers and Forced Air Furnaces

There are two typical methods for heating the home.
A furnace heats air by using fuel (usually gas) to heat up its coils, and then a blower motor moves the warmed air through the home's duct system, distributing it through the vents.
A boiler is a heating system that generates heat by using water. Boilers can run on electricity, gas, oil, or alternative fuels like wood pellets. They work one of two ways: The boiler heats the water, which in a hydroponic system, circulates in the combustion chamber of the boiler, then flows through a network of small hot water pipes in the home. In a steam system, the water is converted to steam and sent through the pipes to be distributed throughout the house via the radiators.
Boilers and Furnaces: efficiency comparisons
Both heating methods can be efficient, but in order to check your system, look at your heater's AFUE (Annual Fuel Utilization Efficiency) rating, which tells you how much fuel is converted to heat. If the rating is high, the unit is more efficient. For example, a furnace with an AFUE of 70 converts 70% of the fuel to heat and loses 30% during combustion.
There are pros and cons to both home heating methods. Boiler heat is often more steady and consistent in temperature while furnaces use warm air, blowing it around aimlessly which creates a drafty environment.
Other Differences
Another difference is in the temperature from one room to another. If the house is heated with a boiler system, room temperature may vary, as the system works with the radiators in each room. Furnaces by contrast, typically heat your whole home at one time, so each room is around the same temperature.
Budget Considerations
When debating which type of heating system to install, consider also your budget. Installing a boiler system is more expensive than using the air conditioning ductwork to heat the home by adding a furnace, but using a boiler has a few advantages over a furnace.
Hydronic heating systems don't blow dust and allergens throughout the house, drying out the air like furnaces tend to do. Boilers provide a more gentle and comfortable heat.
Maintenance of Boilers and Furnaces
Another difference between these systems is the type of maintenance required for each heating system. Furnace systems can be easily maintained by checking the water level from time to time, and replacing the filters which require frequent changing: Once a season at least, ideally every 1-2 months. Boilers, by contrast, typically only need to be serviced annually. Cast iron gas boilers, however, can run for years with minimal maintenance.
Closing Thoughts
If you are in the market to get a new heating system for your home, consider the pros and cons of both methods. Contact one of the qualified HVAC technicians at FG Lees & Sons to help you decide whether a boiler or furnace is ideal for your home. Servicing both furnace and boiler systems, FG Lee’s and Sons is a highly rated local provider of heating and cooling services.





