you should be aiming to change the air in your grow room every 3 minutes, and try to keep temps below 80 deg F with the lights on. My grow room runs at between 82 - 88 deg F and my babies look fine but any higher and growth will slow and then stop altogether at about 95 deg f unless you are using CO2.
sorry, I couldn't be arsed to do the maths but I'm sure you can work it out
good luck man
