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

Our answer is, it’s a smart method. Here's why.

Paired design—Your furnace is designed to function with a corresponding air conditioner. This might help improve energy efficiency and performance.

Technology upgrades—There have been abundant recent increases in HVAC technology, especially in energy efficiency, air filtration and quiet running. You’ll have these benefits year-round when you improve the full system.

Better heating and cooling efficiency—Efficiency levels are based on matched equipment performance. While adding a single new unit will improve performance, efficiency will be lacking from what it was envisioned to be. And your savings will not be as much as they’d be with matching equipment.

Equipment age—If your air conditioner is 10 years old (or older), your furnace is likely just as dated. Replacing both means you’ll enjoy many years of efficient comfort, whatever the weather.

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

At first glance, installing just a new air conditioner or furnace can appear to be a good decision. But it’s not quite a good bargain when you factor in reduced efficiency.

Replacing an entire system might cost more, but you earn much more efficiency, reliability and comfort for long into the future in Gaithersburg.