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Two fans one ducting

1K views 3 replies 3 participants last post by  Bob Mariani 
#1 ·
We are installing a rangehood and need to know if we can use the existing fan in the rangehood as well as an external fan to assist the airflow as it has to go 10m with 4 right angle bends in the ducting.
Will having two fans cause a negative effect?
 
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