Chloramine gas is no fun at all. Heavier than air, persistent, highly reactive, and deadly even in tiny quantities. This is what happens when one mixes bleach with ammonia - AKA cat-****. And what the fan gets may be the bulk of it, but is by no means all of it.
Even microscopic quantities are incredibly dangerous to cats, dogs and other small creatures, and cats in particular are acutely sensitive to the material.
This is from the idiot that worries about his fan over his cats, exposes his cats to recycled rubber, and hobbles his cats - most tellingly, when he is not on the premises. This is just his last three threads.
https://en.wikipedia.org/wiki/Chlorine_gas_poisoning
Peter Wieck
Melrose Park, PA