Look inside the Oxyflow Soft Sitting Hyperbaric Chamber by Oxygen Health Systems. This is perfect for home use or a clinic as it is very versatile.
I personally like the option to sit up as I spend a lot of time inside the hyperbaric chamber and want to be able to use my computer or complete my work. I am much more apt to go in there knowing I can still get other things done.
When I originally started, I was very sick and needed to lay back and just rest, but now that I am back to a healthy lifestyle I like the versatility of both positions.
I recommend you think about your day and your lifestyle. You are going to be investing your time in completing your sessions on a regular basis.
Do you want the flexibility to sit up and lay down?