It's insane the extent to which these holistic wellness scam places are allowed to just purchase risky medical equipment and deploy it without any sort of licensure or credentials (see also: hyperbaric oxygen therapy)

I mean the system is decades old and had been out of use for several years, so the system would need to be completely removed and replaced, and this is an industrial scale job, so it's a bit more time consuming than home HVAC

Basically the heating and cooling systems have smoke detectors which automatically shut the machine off upon detecting smoke which happens after very little time running

No, it *is* a law and *was* illegal and then struck down as unconstitutional by SCOTUS. Not only "not illegal" but "cannot be illegal."