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

Our response is, it’s a wise idea. Here's why.

Coordinated design—Your furnace is designed to function with a paired air conditioner. This may help improve energy efficiency and performance.

Technology upgrades—There have been a lot of recent improvements in HVAC technology, especially in energy efficiency, air filtration and quiet running. You’ll have these perks all year when you upgrade the complete system.

Improved heating and cooling efficiency—Efficiency rankings are based on corresponding unit performance. While adding one new unit will enhance performance, efficiency will be lower from what it was envisioned to be. And your savings will not be as large as they’d be with matching units.

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

Up-to-date warranty—A new set of equipment also means you’ll get updated system warranties. You’ll receive peace of mind when you know the warranty covers your whole system for the same period of time.

At first glance, getting only a new AC or heater may seem like a smart decision. But it’s not quite a good decision when you factor in lower efficiency.

Installing an entirely new system could cost more, but you receive much higher efficiency, reliability and comfort for many years in Calgary.