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

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

Coordinated design—Your furnace. This might help improve energy efficiency and performance.

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

Higher heating and cooling efficiency—Efficiency ratings are formed on matched unit performance. While getting 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 units.

Equipment age—If your air conditioner is 10 years old (or older), your heating system is likely just as old. Replacing both means you’ll have lots of years of efficient comfort, whatever the season.

New warranty—A new set of equipment also means you’ll receive up-to-date product warranties. You’ll get peace of mind knowing the warranty protects your entire system for the same time period.

At first glance, getting only a new cooling system or heater could seem like a bargain. But it’s not a great decision when you factor in lower efficiency.

Installing an entirely new system could cost more, but you get much higher efficiency, reliability and comfort for years to come in Philadelphia.

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