There are two versions of these... need to compare apples & apples.
Note the HEAVY DUTY version spec states:
Heavy Duty Blowers
are designed for applications such as commercial or high use engine room ventilation and extraction where a long life requirement demands heavy duty motors with long brush life
Built to provide the same high outputs as our standard specification blowers.
■ 5,000 hr motor life for the heaviest of applications.
■ Continuous duty.
I didn't see a motor duty cycle spec for the "Std Duty" model?
Note also - ABYC H-02 states:
2.6.3 Powered Ventilation System
126.96.36.199.1 Blowers shall be rated for continuous operation
at 120% of nominal voltage.