It's encouraging to note that I'm not the only one thinking along those lines, Graham.
I hope (but I must admit, suspect otherwise ... and would be more than pleased to be proved wrong) this wasn't yet another case of "short-cuts" being taken, using the "pandemic" as the er,
excuse (what other word can I use - reason, perhaps).

I also can't help but wonder what form these "written assurances" take (that is, what do they say), and what value they actually are. In practical terms, that is. Surely the "bottom line" is that the filters need to be autoclaved. So, do the manufacturer's instructions differ (at all) from what normally takes place in the CSSD? And, if they do (and the recommended technique is valid - and why wouldn't it be), why not adjust the CSSD procedures accordingly?
What matters most here ... getting the ventilators into service, or "following the rules" (or whatever else it is causing the hold-up)?
But on a positive note, let's hope that it all ends up being sorted out ... and soon!