The website lists three modes, which all have the fan but differ in thrusters. The variants are: no thrusters (thus no COPV), acceleration-only thrusters, and flying thrusters. The flying one has the disclaimer "Note: Not approved for public road use." OTOH the acceleration-only thrusters may be street legal. However, I expect that the COPV will be kept empty (thus not dangerous) unless you select a special "launch mode".

Hopefully there will also be a warning siren while it is pressurized. "Dangerous enough to need a warning siren" seems like a plus for the target market, honestly.