I've heard of commercial operations in the pacific northwest that produce lots of pounds of cyanescens and lots of pounds of bud. It's safe for your plants. The humidity is different for a flowering room and a mushroom fruiting room. You'd need like a tent inside your tent with a humidifier in it. Or the cooler, but that's not going to produce enough CO2 really. To grow enough mushrooms to augment your room with them, you'll need to be fruiting on a bulk substrate. I suck at inoculating bulk substrate though. I'm going to experiment with this method next year some once I have the $$$ to build a tent that is HEPA filtered and sealed well.