Ventilation: This was a HUGE issue with the 450, so on the rebuild I elected to give the wetroom and the headspace above the tank is own fresh air intake and exaust. Here is the exhaust for the wetroom. It is a 100 CFM 1.2 sone bath fan. It is super quiet and will be tied(eventually) to a AC III with a temp and humidity sensor.
The infrastructure mostly done: I only had electrical, which I still have to finish and a few other items. Then it's plumbing and equipment time!
The west wall:
The supports are bow wrapped:
