I regret not getting clearer pictures to zoom in and see the words on the instruments but I felt the need to be discreet as I was just walking by, these ocean-front home garages are rarely/NEVER left open unattended. What is this mystery chamber?
One more different angle picture in the comments, you can see the seating bench in the chamber.
I think it’s a Macy-Pan Hyperbaric Oxygen Chamber. I found an image but the link doesn’t load
https://www.macy-pan.us/
That site sometimes loads and sometimes doesn’t, but this appears to be the exact model
I’m curious what the purpose of the screen on the outside and the telephone are for?