I've had several dryers outside, and occasionally the washer too. It's AZ so there's no humidity to kill it, and keeping heat outdoors is always good. In houses with a swamp cooler it would be more humid inside the house. And no dryer vent to clean. I lived in a house with a weird semi carport/garage thingy, which had hookups for it. There was a garage door, and roof that was part of the house, but the other two sides were totally open. Weird but also useful. Many older AZ houses had odd arrangements like this.
On the original question I'm confused why this needs to be a "part" and not just some wire and connections.