Cr2 is not an accurate 100 to the T measurement. They switched to CO2 recently and during the making of this video, CO2 equipment is coming out. We used to use Sear for the longest time and because of the way the systems are tested and they attach these ratings to them, they can't be dead on a hundred percent. CO2 is a little more accurate because it takes into effect more real world applications, ductwork that's not perfect and things like that versus the way Seer was.

But if you're comparing an inverter system to say a single stage or multi-stage system, your inverter system. At times it can ramp up and down. It's got times where it's just barely running versus these other stage systems. They're either off or they're on.

They might be in first stage or second stage. they're still either off or on and there's no in between there. And the reason that's important is it's hard to compare the two.