How do i know if my fans are intake or exhaust i have 1 on the back 1 one the side and one of the front, when i put my hand on the one of the front i can feel air but not sure if it is exhaust or intake. It came this way aswell.

Also if i buy a fan how do i know whether it is intake or exhaust or will it just do what it is supposed to?

You could use your hand by wetting your fingers and then holding it near the fan - it's easier to tell if the fan is blowing or svcking that way. Or you could use smoke from a match or whatever.

If the fans came on the case like that then it's likely the front will be intake and the rear exhaust - not sure about the side.

As for your second question, I have never considered this when buying a fan. I would assume most fans are reversible but I don't know.

How do i know if my fans are intake or exhaust i have 1 on the back 1 one the side and one of the front, when i put my hand on the one of the front i can feel air but not sure if it is exhaust or intake. It came this way aswell.

Just use a piece of tissue and see which way it waves. Also, most fans have indicators on the fan mount that show which way the air blows, its an arrow that sticks out.

Usually, the front fan is an intake, rear is an outtake, and the side fan is an intake, (and my top fan is an outtake), that's the way its setup on my HAF932.

Also if i buy a fan how do i know whether it is intake or exhaust or will it just do what it is supposed to?
You can flip a fan the other way round and it'll work either way, just make sure the arrow indicator thingies i was talking about before are pointing the way the you want the air to flow

Thanks the one on the side and front are intake thanks for the tissue suggestion