Dare you to lick the paper clip!
Usually if a manufacturer includes three fans built-in, they have the one at the front pushing air in, and the top/rear ones pushing out. Which is great, but 2x fans pushing more out than the one can push in leads to air (dust) being sucked in through all the other little cracks and crevices and making it dirty inside leading to potential overheating issues. It's not great sticking a vacuum cleaner nozzle to a mobo, nor spraying an airduster at the components. I'd move, if possible, the top fan and stick it on the side, as an intake fan. Or get a larger capacity fan on the side - cheap enough. Don't forget your filters for them.
And finally, was one thread for your PC build not enough?
