When substituting the outdoor system, should the indoor unit also be replaced?

Our reply is, it’s a good approach. Here's why.

Coordinated design—Your furnace is made to run with a paired air conditioner. This can help better energy efficiency and performance.

Technology upgrades—There have been many recent increases in HVAC technology, especially in energy efficiency, air filtration and quiet operation. You’ll get these benefits all year when you upgrade the whole system.

Higher heating and cooling efficiency—Efficiency levels are determined on corresponding unit performance. While putting in a single new unit will improve performance, efficiency will be lacking from what it was engineered to be. And your savings will not be as much as they’d be with matching units.

Equipment age—If your air conditioner is 10 years old (or older), your furnace is likely just as old. Switching both means you’ll have many years of efficient comfort, no matter the time of year.

Up-to-date warranty—A new set of units also means you’ll have new product warranties. You’ll have peace of mind knowing the warranty covers your complete system for the same period of time.

It would appear installing just a new AC or heater could seem like a smart decision. But it’s not a very good decision when you consider reduced efficiency.

Replacing an entire system might cost more, but you get much better efficiency, reliability and comfort for many years in Hurricane.