Static pressure is also known as system air resistance, and it is essentially a measure of the resistance to airflow that occurs in the HVAC system. Symptoms of a static pressure issue include excessive noise, hot and cold spots in the home, and even equipment failure.
In other words, how strong is the fan motor when there’s air that needs to be pulled or there’s something in front of it when it needs air to be pushed into it. The stronger the fan motor the better.
1100m3 /hr is the same as 647 CFM.
https://www.easycalculation.com/unit-conversion/m3h-to-cfm-calculator.php
On the surface it appears to be similar to what I have but an 8" version. Most of the 8" inline duct fans are a little stronger actually.