WHAT IS A FURNACE?
A furnace is one of the main components of your HVAC system. When you set your thermostat, you activate your furnace to begin heating air. A fan switches on and circulates this warm air through your home. How the heat is transferred to the air depends on the type of furnace.
Any furnace heating comparison should start with an analysis on which type of furnace is most appropriate for your home. This might depend on what fuel source(s) are readily available and your budget.
TYPES OF FURNACES
- Natural gas furnaces are highly economical. While older gas furnaces were only about 65% efficient on average, newer gas furnaces can be up to 98% efficient. Natural gas is also the most popular way that Americans heat their homes; nearly half the country currently uses this energy source. However, usage varies widely by region.
- Oil furnaces are most commonly found in the northeastern United States. They are slightly less efficient than gas furnaces, typically between 80-90%, but the upfront cost is lower. Natural gas furnaces can cost up to 25% more to purchase.
- Electric furnaces are the cheapest to purchase and are easier to install and typically last up to 10 years longer. But with the cost of electricity much higher than gas, you’ll pay for the difference with your monthly energy bill.
- Propane is a byproduct of oil and gas production. It’s easily stored in tanks and used by almost 10% of U.S. households. This is a great option if gas and oil aren’t readily accessible in your area.
THE AVERAGE FURNACE LIFESPAN
A well-maintained furnace can last at least 15 to 20 years, but completing annual maintenance and being diligent with repairs can extend its life even longer. Of course, furnace lifespan can be a bit subjective – how many times you are willing to make repairs and when does a repair cost make it more practical to replace it can vary.
