Clearly you need to take a picture of the front of the fan, tape that onto a sheet of material, and put that on stilts above the fan so when you look in, you see the other side. or wear sunglasses, or turn the case upside down, or tint out the side panel window so you can't see in, or leave that fan opening alone for passive intake, or put the case bottom on stilts then mount the filter panel on top of the fan, facing upwards covering the fan itself, or paint the fan frame with brass fleck paint so it looks steampunk, or use a different case, or mount a 2nd fan on top of the first that is right side up, but non-powered so it spings in reverse because the bottom fan is blowing air through it, or you could take apart the fan and rewire it so it spins in reverse if you use a fan with nearly flat blades instead of curved.
This all seems excessive.
There's some fan out there that is reversible but I don't recall the model. Okay it's silverstone:
Buy SilverStone Technology 140mm PWM Fan with Reversible Direction Cooling FHP141-VF: Case Fans - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
These are loud, high flow fans and I'm not sure if they allow using conventional fan controller tech to slow them down... "maybe".