Hi everyone

I was wondering if anyone had any knowledge with respect to fans. If i want a silent system, i would have to use a big fan with low rpm's. I have looked a bit at fans, and have met the terms resistance curve that describes the total pressure loss in the system, that the air has to overcome. And has seen something about that the operating point for a fan is where the system curve intersects with the fan curve. Now with regard to this, i was wondering how the resistance for the system is found, is it with some flow simulation program FEM/FEA analysis? And does the fan have to operate at the operating point, can you deviate from this point as long as you have the pressure needed to move the flow?

Thanks in advance for your help

Regards
NoJosh