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Reply by jamsomito

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Posted on Harbor Freight 2 hp dust collector questions

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jamsomito

657 posts in 1512 days


#1 posted 03-06-2021 05:19 PM

Adding 2 fans in series will double the pressure full closed and adding 2 fans in parallel will double the airflow full open. Actual results will depend on your system curve, or how much resistance there is in your ductwork.

The most dangerous situation with a fan is full open since they are usually designed for some restriction and power is dependent on the volume of air moved – with no restriction the fan will likely move too much air and the motor will likely be overloaded. So based on this, my gut is saying 2 fans in series wont necessarily give you the results you want in airflow, while 2 fans in parallel will bump your airflow but could create a dangerous situation with the motors.

Highly recommend double checking this consensus, but that’s my thought process.


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