Ok... you're right... I've been calling Carolina wrens "house wrens".
At my previous house, I had an outside kitchen with a roof and 3 walls... and the wrens would come in to feed their chicks while I had a group there drinking morning coffee...
And... here's a pic of one that built her nest in my current house, when I first brought it out:
Forgive me for thinking that wrens that came in the house were house wrens...