Kelly, congrats on two dependable pieces of equipment. That dryer is the stack model because the one that sits on the floor has the controls on the slanted area above the door. It has a large capacity so you should get nice wrinkle-free laundry out of it.
The top collar of the tub has all of these diagonal slits and the water from the fill flume sprayed water down onto the tub collar, actually pulling water in during the spin spray rinse so really, the machine fills into the outer tub.