The Yongcheng CZ-TD550w250W centrifugal blower fan rotates at 3,400 RPM, consumes 550W @110VAC/60Hz, and delivers 482.6 CFM of airflow at 0.35 psi.
These are some specs from the same model 220v fan on another site:
Note: all of Thunder Laser USA equipment is 110VAC 60HZ. This is for reference only
This fan ships with the Nova 35, 51, and 63.
Details about the Nova 24 and Mini 60 fan can be found here:
To learn more about exhausting your laser see below: