air flow question!

hi guys i have constructed a grow room in a loft coved with mylar .. my question i will i be able to just use a powerfull fan will that be enough for the air flow if the temp is at 25? it seems quite windy in the room so i think this would be ok? the room is 6 ft tall!
any help would be great!

you should really try to get an exhaust fan so you can bring in fresh air... more specifically... you want to get C02...

looks like you are off to a great start...
25 celcius is equal to 77 farenheit correct?

77 Farenheit is perfect!!

: )