Two 6" inline fans or one 8" fan with a reducer?

  • Thread starter Spock
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Spock

Spock

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Hello everyone

Are there any physics minded people that would know the answer to this? I have a larger grow area and a 6 in inline exhaust fan. I would like to increase my air flow. So currently I have a 6 inch carbon filter in the tent with 8 ft of duct to a 6-in inline fan. Continuing from the fan is about 15 ft of 6-in duct going to a duct reducer attached to a 4-inch dryer vent exhausting outside. Would I be better off replacing the 6-in fan with an 8-in fan with 8-in duct to a carbon filter in the tent and on the other side of the fan have a 6 to 8 in reducer and 15 ft of 6-in duct reduced once again to 4-in dryer vent. Or would it be better to keep my existing 6-in fan and add another 6 in booster fan right at the reducer to the 4 inch dryer vent? Basically would I be better off using a single bigger fan going from 8 in to 6 in to 4 in or using two 6 inch inline fans?

Thanks in advance for any advice.
Cheers
 
freezeland2

freezeland2

2,279
263
Hello everyone

Are there any physics minded people that would know the answer to this? I have a larger grow area and a 6 in inline exhaust fan. I would like to increase my air flow. So currently I have a 6 inch carbon filter in the tent with 8 ft of duct to a 6-in inline fan. Continuing from the fan is about 15 ft of 6-in duct going to a duct reducer attached to a 4-inch dryer vent exhausting outside. Would I be better off replacing the 6-in fan with an 8-in fan with 8-in duct to a carbon filter in the tent and on the other side of the fan have a 6 to 8 in reducer and 15 ft of 6-in duct reduced once again to 4-in dryer vent. Or would it be better to keep my existing 6-in fan and add another 6 in booster fan right at the reducer to the 4 inch dryer vent? Basically would I be better off using a single bigger fan going from 8 in to 6 in to 4 in or using two 6 inch inline fans?

Thanks in advance for any advice.
Cheers
If in a legal state or odor is otherwise not a concern just ditch that 6” carbon filter.
 
Spock

Spock

27
3
That would give me a little more airflow but I'm not sure it would increase it a whole lot. It is legal where I am so I'm not concerned about that, but I also don't want to advertise to or annoy the neighbors. More out of consideration than anything.
 

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