Here’s the tricky thing about replacing your furnace:
When the time comes, it most likely won’t be obvious.
Your furnace can appear to be operating decently for several months. In reality, it might be suffering from lowered efficiency, a tendency to break down more often, or other unseen issues.
When you do the math, you’ll find that keeping that old thing is contributing to hundreds of dollars in unneeded maintenance and repairs—replacement then becomes the economical choice.
So that begs the question: when should you repair, and when should you replace?