An innovative air circulation system allowed a fire to be built in this room. Smoke would exit through a hole in the roof. There was an opening in the cliff wall, which would have been in the far, lower right of this photo.
Near the ball court was this blowhole, a crevice in the earth's crust that appears to breathe. There is no proof the residents of Wupatki used the blowhole for anything, though they may have given them spiritual significance.