MileHi - can you give an opinion on what this setup would/could/does support?
Tex - for your files and input.
Also, the 'garage' you were looking at near the effluent spot. Have you seen this closeup before? I can't remember if you addressed it already. Apologies.
There are from the link in Q drop #3500
Wow, very interesting.
Not really, but a large mechanical room that I would be familiar with would typically have a boiler for heating and a chiller for cooling/dehumidification and an air handler to supply fresh air and heated/cooled air. In an underground space supplying fresh air and exhausting stale air would be a big deal I would think. That space might also have a backup generator for power. Truck access in front would be essential for maintenance.