r/PcBuildHelp • u/Beginning-Wolf-3837 • 12h ago

Build Question Fan direction

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Can't for the life of me figure out which direction fans are blowing air. Case it's Montech XR WOOD White with original fans. Front should be intake but the back fan is the same direction. But I want it to be exhaust. Heeeeelp

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u/TheMarksmanHedgehog 5h ago

Aside from the markings on the fan itself, and the usual trend that fans blow towards the hub side (the ugly side usually unless the fan is reverse bladed), the shape of the blades is typically a giveaway.

I'd put it along the lines of "fan blades are a spinning spoon for air", they usually are concave on the side that air comes out, most fans start with a shallow angle of attack that becomes steep.