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There's phone booths for companies that are already being produced & sold. It actually has a fan to just vent air out and take it in from the bottom. Nothing blowing on your head...

Or fan sucking air upwards -- negative pressure. Tiny floor registers may help with convection too, in order to maintain temperature.

I've been running my bathroom exhaust fan while WFHing these days and it's been getting rid of all kinds of smells and vapors in my apartment without me opening the windows.

Just be aware of where the air is coming into your apartment from. If it's coming through the walls or attic and being 'filtered' through decades old insulation potentially filled with animal droppings or carcases it's probably not that great for you. Modern builds have HRVs which bring in fresh filtered air from outside.

Direct head-cooling, now you can overclock your brain more comfortably!

make sure you apply the right paste between the fan and your head for proper thermal conductivity