In most cases, your central air system and your furnace need to complement each other. If you're replacing or installing one or the other, you have to consider both. This can cause people consternation. But you should understand why it's important to consider both, even if you just want to replace one.
Looking at the Whole Picture
The obvious connection between your HVAC components is that they share the ductwork. That alone is cause for evaluation since your ducts need to be of adequate size for all of your HVAC equipment.
In addition, they both must use the same electrical system. That means it's possible to have an electrical issue if one of the HVAC components has far different power requirements than the other.
The not so obvious connection is the shared indoor cabinet. Your furnace and AC both share the same air handler. The coil cabinet of the AC, which contains the evaporator coil, typically sits on top of the furnace. The evaporator coil serves both heating and cooling mechanisms.
Besides all of that, keep in mind that you're looking at three main parts, not just two. The AC has an outside unit as well as an inside unit. So it's possible to swap out either one part of it, or both.
Potential Problems With Mismatching
But Do You HAVE to Replace Both?
No, you don't always have to replace both the furnace and the AC. You can replace one, as long as you make sure it will work well with the remaining pieces of equipment. This is not something you should try to figure out on your own.
Ask an expert if you can upgrade just one part of your HVAC system. An HVAC installer can figure out if it's feasible or not. With all that said, you should definitely consider a full HVAC system replacement if you want to avoid potential problems.Share
21 March 2016
When our air conditioner broke last year, I was fairly confident that we would be left trying to choose a similar system for a bunch of money. However, our friend who works as a general contractor explained that there were all kinds of neat advances in HVAC systems that might help us out. He explained that we might be able to enjoy a quieter system or one that filters our indoor air more effectively. We liked the sound of that, so we started shopping for a new system. After finding an air conditioner that was perfect for our place, we started this blog to educate other homeowners about new technology.