As best as I've seen?

Spidermite gassing...

Sealed room and the co2 displaces the oxygen. Think bath tub. The 3 sensors measure concentration.

People have died because of this... More co2 at the floor. If you pass out? Well....

Next the plants actually convert it to a usable environment pretty quickly! Why I advocate for more air VS co2.

But works great when you want to gas the room! And no harm!

Vote and here is a share! Great question!