5 Differences Between Boilers and Furnaces

Two standard systems often come to mind when heating a home: boilers and furnaces. Both are effective at keeping your home warm and comfortable during the colder months, but they operate in fundamentally different ways and have distinct features. In this article, we'll show you five key differences between boilers and furnaces:

1. How They Generate Heat

Boiler: A boiler heats water to produce either hot water or steam, which circulates through radiators, baseboard heaters, or radiant floor systems. This method, known as radiant heating, provides consistent, even warmth throughout the space.

Furnace: A furnace heats the air, which is then distributed through ducts and vents using a blower, referred to as forced-air heating.
The primary difference lies in the medium used to transfer heat: water (or steam) for boilers and air for furnaces.

2. Energy Efficiency

While many believe that boilers are more efficient than furnaces, significant technological advances, such as sealed combustion systems, have made them equal in terms of energy efficiency.

3. Installation and Maintenance Costs

Generally speaking, there is no significant difference in price for installing and maintaining a boiler or furnace. Overall costs vary depending on the homeowner's chosen options for installing alongside each system. That said, prices will be significantly higher if a homeowner already owns a radiant heating system and chooses to install a forced air system. The same is true for a homeowner who already owns a forced air system and decides to install a radiant heating system.

4. Air Quality

Because boilers are sealed systems, they do not affect indoor air quality. On the other hand, a furnace allows you to customize indoor air quality. For example, a homeowner may install a humidifier or a high-quality air filtration system to fine-tune indoor air quality.

5. Durability and Lifespan

Both boilers and furnaces are rugged, reliable, and durable. The durability of these systems ultimately depends on the quality of installation and upkeep over time.

Conclusion

We hope this overview has given you the essential information to make informed decisions regarding your heating system. If you have questions or concerns about which system is right for your home, you should speak to a knowledgeable HVAC contractor.