For whatever it's worth; The one I bought has a little "Heat Sink" lol, built into it, and then two fans, keeping the air flow.

Nihil has a point though; Anything you hook up to the machine itself, is going to in general, raise the temp.

And Spec basically said exactly what I do; Take a Vacuum, and just suck it like you owe it money. That way you don't have any dust bunnies. Ohh I made a rhyme! lol.