This is just a variation of my pistol shaped personal fan that utilizes air amplification design strategies to gain a bit more air flow. This model is intended to use at the gym to get some air while I walk on the treadmill though I have yet to bring it there for testing.

battery box has room for 1s3p battery configuration

The shortAirAmp is challenging to print cleanly and I think I need to slightly modify the sharp edge of the air exit to improve printing. So far, I've had best results printing with the air exit facing down and using normal (not tree) supports