need some help running my co2 please

i bought 20lb co2 tank and regulater and timer ihave a 12x12 sealed room can someone please tell me in a simple way how to operate this stuff please i have never messed with this stuff before

put the regulator on the cylinder. set the flow on the regulator set the timer. are your fans on a timer. co2 should run when fans are off. I would set pressure around 5-8 psi and run for up to full off time fan cycles. IMO you need to bring co2 levels up to about 15oo ppm. your room is seeled so be careful co2 will kill you. we had like 20 cylinders draining in a big room the guy I was working with walked about 10 steps into the room and passed out. He was lucky I was able to pull him out. lots of little things about working with gasses. let me know if I can help.