Furnaces have been a great source of home heating for hundreds of years. Let’s be clear though, the furnaces of today are set apart from the ones that may have been in a home 100 years ago. Modern systems use different fuels and are far more efficient and effective too.
Let’s talk about those fuel sources for a moment. If you are looking at getting a furnace upgrade anytime soon, or even if you are just curious about what your options are, you’ll need to understand what is available in terms of what your furnace can use to do its job.