For a 2nd opinion, yes, optimally your fans should be blowing air in in the front and out in the back, exactly what SB said.
I would also reccomend an intake fan if you only had one.
If you get more case fans in the future, be sure you're running at a balanced pressure with the air outside. Don't set 3 fans to intake and 1 for exhaust, but rather 2 for intake and 2 for exhaust. If they weren't balanced you would be either pushing too much air into the case or sucking too much out, which is horrible airflow. Always keep it balanced.