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

Our answer is, it’s a good idea. Here's why.

Paired design—Your furnace. This can help improve energy efficiency and performance.

Technology enhancements—There have been abundant recent increases in HVAC technology, especially in energy efficiency, air filtration and quiet heating and cooling. You’ll receive these benefits throughout the year when you upgrade both units.

Better heating and cooling efficiency—Efficiency ratings are calculated on corresponding equipment performance. While putting in a lone new unit will improve performance, efficiency will be lower from what it was designed to be. And your savings will not be as much as they’d be with a matched system.

Equipment age—If your cooling system is 10 years old (or older), your furnace is likely just as old. Switching both means you’ll receive lots of years of efficient comfort, whatever the weather.

Updated warranty—A new set of units also means you’ll get updated product warranties. You’ll have peace of mind knowing the warranty covers your whole system for the same time period.

It would appear installing just a new air conditioner or heater can appear to be a smart decision. But it’s not a very good bargain when you consider lower efficiency.

Replacing an entire system could be more expensive, but you earn much better efficiency, reliability and comfort for many years in Indianapolis.