Reflection 312BHTS travel trailer vented or unvented dryer?

If you look at the Reflection Travel Trailer 312 BHTS floorplan, you will see that it comes with a washer/dryer combo prep. I saw the prep when we looked at the trailer. They are putting in a Splendide combo if we buy. The dealer is closed and I failed to ask if this model took a vented or unvented model. If you have this model, let me know. Love the bunkhouse floorplan that has a door for the kids.