Dell Dimension 2350 CPU fan direction - intake or exhaust?

This Dell has a Pentium 4 2.2GHz with a case mounted CPU cooling fan that exhausts heat out the back of the case via a tunnel to the CPU. Shouldn't this fan be pulling air in over the CPU rather than pulling air out of the case? I bought the PC used and wondered if the fan had been replaced improperly or if this exhaust configuration is correct. Thanks.
 
Would you want to blow hot air from the CPU back into the case?
No you want to exhaust hot air from the CPU out of the case...this is normal I think.
 
That's the way I see it too, but wanted to get a second opinion before I do the work - I've come across a few other PC's with this configuration. Thanks, I appreciate your input.
 
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