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

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

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

Technology advancements—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 the full system.

Improved heating and cooling efficiency—Efficiency ratings are calculated on matching unit performance. While putting in a lone new unit will improve performance, efficiency will be decreased 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 AC is 10 years old (or older), your furnace is likely just as old. Switching both means you’ll enjoy lots of years of efficient comfort, whatever the time of year.

Up-to-date warranty—A new system also means you’ll receive 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 good decision. But it’s not a great bargain when you consider lower efficiency.

Replacing an entire system could be more expensive, but you earn much better efficiency, reliability and comfort for long into the future in Indianapolis.