There are a total of 4 fans in the case, 2 80mm fans in the back and 2 92mm on the side panel. The 80s are situated right above the power supply and near the I/O panels in the back. The 92s are right on top of each other. The 2 80mm are rated at 86CFM (combined) while the 2 92mm are rated at 100CFM (combined).
The side fans are pointed directly at your CPU and video card, which should help in cutting the temperature for that area.
The rear fans exhaust the hot air, while the two side panel fans blow air in. Unfortuanately, there is no front intake fan near the bottom of the case. Strange, but this case has been tested to perform the best this way by 3DCool. Here's what they said in regards to their fan placement:
"We tried everything possible with the HellSTORM 2000. We tried fans on the top, bottom, front, back, and both sides in every combination possible. This design was the one that proved to be the most effective. We didn't sacrafice quality for cost on the HellSTORM series cases, and it shows. Don't be fooled by competitors selling cases with a dozen fans saying that theirs is cooler, when the extra fans are proven to just create noise and disrupt airflow. Our fan placement is the absolute best possible for this exact case."
One gripe I had was that they kept the stock grill. It might have been better to cut that out to allow a bit more airflow through.
Also note, the case comes with a removable motherboard tray. Which makes it easier for some people when installing their components. You just need to remove 2 screws to slide the tray out.
Now before we go inside the case, keep in mind this case is not screwless. So you lazy folks, break out that philips screwdriver because you're going to need it.