No no I mean 𝘪𝘯𝘴𝘪𝘥𝘦 pressurized environment. Because it is pushing air but a rotating fan can create unwanted torque. These should be lighter too.
See Asrobee and Int-Ball
https://en.wikipedia.org/wiki/Astrobee_(robot)
https://en.wikipedia.org/wiki/Int-Ball