I think this actually makes it more understandable. If recirc is a special mode you have to activate in your car's AC, then it's reasonable to assume it's not t

I think this actually makes it more understandable. If recirc is a special mode you have to activate in your car's AC, then it's reasonable to assume it's not the default mode for your house AC too. Since they never had a 'recirc' button to press at home, they'd assume it doesn't recirculate. Reasonable, but inaccurate.