Adding co2 but a lil confused

Ok first let me explain my groom room

I have a 10 by 10 by 7 flower room. Completely cover in mylar top to bottom. I have two 600 watt argason red bulbs with two 600 watt electronic ballasts. Then for venting i have two 6 inch inline fans i forget the name but they work good. The vented air going threw ducting to ouside. I then have a protable ac unti to cool the room too. Tempertures useing stay between 70 and 77 degrees. The entire room is sealed off extept i usually leave the door open but i can close to make completely sealed.

I just bought a 20 pound co2 tank and regulator. I havnt install it yet. I will be using a regular timer with 15 min iterments for not. I have to co2 test kit yet but i think i should get one i dunno.

I just want to know if its good to have co2 and a ac unit in the same room. And how long should i run the co2. I heard 15 mintes on and 15 off. But im not sure about my room. Could some one help that has some expierence with co2?

idk about the tank but im using a simple yeast method. if u have money constraints then i wouldnt use the co2 till flowering. but usually u want the c02 to gather so best bet would be to put the c02 into the room when the fans r off so it can sit and the plant can really enjoy it. but otherwise timeing shouldnt be a big deal. just how much u use and how much you want to spend on c02 refills

hey thanks for the reply... well yea i know all the fans are suppose to be off once the co2 turn on then the fans can turn back on when the co2 turns off... i realy just dont know how a co2 tank realy works.. i mean do i have to test the air for how much co2 is in the air. Cause i dont want to much and harm themor somthing. I just want to hook up my co2 tank so it will benifit my plants the best. I realy dont care about filling it up just want my plants to get bigger and better buds

actually u want massive air movement because co2 from a tank is heavier than air so it will sink and not do much good. get extra fans all at a slightly up angle. and u probably know this but co2 is only used in the light cycle so a timer with a photocell helps a lot otherwise u will need 2 timers. ac is fine with co2, i use both, but it is exhausting air so you may need to go for a longer cycle or more often. one final note is plants respond better to co2 in a warmer environment like 80-85 and this will make your ac run less saving electricity and making co2 more efficient. if you end up with a co2 generator it is lighter than air so aim those fans down. also in a 10x10x7 try adding 2 more 600's and you will have a decent production room. hope it helps and good luck.