Abit of Diy

Hi guys, im just woundering if puting a home made co2 genarater into a smallish growroom with a blackout sheet as a door? ive read afew things about it abit on this site but some say its good and some its not so good) lol (catch 21 really)
Could someone plz tell me if you'd think it would be some benifit to it?
I know it may sound abit of a stupid qestion but there you are,
Thanks in advance scunk

benefit to the black out sheet or th co2? there is always benefit to co2, the question is the benefit large enough to justify the cost. how small is a small room, do you have heat issues?, how many times do you go in and out of the room? what kind of ventalation and air flow is in the room? how many plants are you growing?

Theres only 2 large plants, dont know what strain, 3 northern light feminized, its about 1 meter and half across and from front to back and then say just over the same in highth.
Temps are 70-75 day time 66-68 when lights off, and humidity is around 50-67 all time, i got a small fan and a cloackroom dehumidifier but at the mo im not using as a was told or read op teps and humid are in between 40-80 and 70-75temps