Spent time trying to fine-tune the air conditioning – it’s a little too powerful due to being in a 2 story home, so we had to redirect the pressure overflow to the bathroom. Overall the solution seems to be working.
Heard back from the coolsuit people who were following up the problem with the bladder in my coolsuit backpack. They were checking the other ones they had in stock, and all of them had perished in the same way on the shelf. So, at least I didn’t have to convince him that it wasn’t user-error. We’re waiting to hear from the manufacturer as to what spare parts they can supply.