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Old 03-11-2009, 09:29 PM   #1
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Summer is coming, Whole House Fan

I am adding whole house fans and to reduce the noise I am ducting the air from the intake register to the 2 fans 15' away in the attic. I intend to connect the intake register to the fans via 2 x 14" flexible duct. I need to make 2 x 45 deg turns on each fan. Airflow is 1600 cfm/fan. Is this going to reduce my airflow in any significant way?. Obviously I want max airflow.

Thanks to the group.


Last edited by Speedbird; 03-11-2009 at 09:35 PM. Reason: Clarity
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Old 03-11-2009, 09:41 PM   #2
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Might want to check, what static pressure the fans are able to work against.

Will each fan have its own back draft damper. They each need their own.


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Old 03-12-2009, 05:05 PM   #3
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Don't have the fan so large that it steals combustion air from gas-burning appliances in your house.
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