I'd be careful growing these indoors.
Oyster spores are the worst of the worst. They irritate the eyes almost immediately, but over a period of a few years, you'll develop an internal allergy to them and have to stop growing, unless you begin right NOW wearing a respirator whenever you're around them.
I first developed the allergy when growing H ulmarius, but later found I can no longer grow P ostreatus either. The symptoms are flu-like, with high fever, migraine headache, and phlegm in the lungs. Once you get the allergy, the slightest exposure gets you sick. I now even get sick when the outdoor oyster mushrooms are fruiting down by the creek.
RR
from here:
https://www.shroomery.org/forums/showflat.php/Number/13164058#13164058
It's not just oysters. I used to grow mushrooms indoors but after a while contaminated cultures (mostly trichoderma I think) were making me sick. One night I was sure I was going to die, my heart was racing and I couldn't breathe.
Spores also kill delicate mechanisms, like analog hygrometers and computer mechanical hard drives.
EDIT:
Forgot to mention that the couple of times I grew pleurotus ostreatus it fruited in summer (20°C +). I guess that complete substrate colonization was a strong enough trigger.