This is our extra depth option. Choose either Plus 12" or Plus 20". When choosing the plus 20" the top of the dome would be about 28" under the ground. This does not change the head room which all are about 6'6".
This is of the back wall. Rather than having a turban, We can install these about anywhere. They extend out from the shelter about 6" so you can attach PVC and run as needed. Mostly used in under slab installs. We refer to them as "vent nipples"
Left is our emergency jack option. Rather than the side wall mount. You store it under the benches till needed then mounts into brackets in the center of the third step. It took up no room this way and gives about six inches more lift.