Aha!

Gary was on a reconnaissance mission today. That's his story and he's sticking to it.

When Stan got home from his VA appointment today he heard laughter coming from the basement. Upon investigation, he discovered his wife down there with a strange man.
Identified as Gary from Quality Heating and Air Services, he said he was here to check out the Air Exchanger. A few years ago there was no such thing as an Air Exchanger. Now they are a required piece of equipment with moving parts that eventually go bust in the night.
Our Ven-Mar Solo 2.0 US Air Exchanger will get a new motor and squirrel cage for $550. Installed. Gary was here this time, he said, just to check and see if Stan's earlier diagnosis of the problem was correct. It was. So he'll come back later with the replacement assembly and slide it in. "Easy peasy," snorted Stan. Gary had to admit it would be.
And while Quality Heating is at it, they'll perform a Peace of Mind $86 checkup of the furnace weak points. With temperatures plunging the way they have been, you can't be too careful.
Gary asked who would be at home for his next service call.
"Both of us," Stan said firmly.