need big help

hey guys i got this new grow room and ive got fans and oumps and all of that to keep it cool and stuff like that bit i still need help on a couple of things like what do yall use to keep it the right temp. i just dont know how to wire in my blower so that if it gets to hot how would i cool it off or heat it up do i need another source for that or what please give you advice and i need to know how would i control the humidity level in it to thanks for all the help

you could use an air conditioner.............
but you should have pretty constant temps as long as you have a controlled environment.

its preatty controlled but with the weather down here its all ways diffrent to day to day if you know what i mean i might have to lok in to that thanks