Exhaust fan outside the grow tent

Currently have this setup:

315 cubic feet 5 x 9 grow tent
8" hyper fan
8 x 24 carbon filter

currently have:
hyper fan mounted in grow tent --> insulated ducting --> attic --> carbon filter --> insulated ducting --> towards attic vent outside

So, the hyper fan seems a bit loud at the moment therefore thinking to switch it around a bit to:

ducting in the tent running to the attic ( 2 or 3 feet approx.) --> to the hyper fan sealing from both ends -> insulated ducting --> carbon filter --> insulated ducting --> towards attic vent outside

i realize it must be sealed for it to work properly.
hoping to reduce noise from fan by placing it in attic
hoping efficiency isn't affected much of exhaust capability.

any suggestions ideas are welcome, thanks

As long as your filter is in the tent you should be good. Hyper fans can handle good amount of pressure at any point. So they can push good and pull good.
Think I said before but I have a isomax acoustic fan. Mine is now in a fridge freezer box surrounded by insulation. That cuts the noise down a chunk. Its fucking huge though..

Theres a good thread on here about sound control. Have a look for it.

I have only my filter in the tent with fan outside of it. I want to get an inline filter so I can have more headroom

A good speed controller will also help. I only run mine on 2 out of 5 most of the time. Sometimes pump it up to 3. Theres a big difference in sound levels

coreywebster said:

As long as your filter is in the tent you should be good. Hyper fans can handle good amount of pressure at any point. So they can push good and pull good.
Think I said before but I have a isomax acoustic fan. Mine is now in a fridge freezer box surrounded by insulation. That cuts the noise down a chunk. Its fucking huge though..

Theres a good thread on here about sound control. Have a look for it.

Click to expand...

i have an inline filter and it's in the attic. it currently has ducting on both ends.. put it up there to save room in the tent

. thinking about placing the hyper fan in the attic too and just running a duct into the tent.

i have a controller and going to run the controller into the tent (very long).

i did adjust the level on the controller but the sound of the fan is still too loud for me, hence the idea to take it into the attic instead

chooselove said:

i have an inline filter and it's in the attic. it currently has ducting on both ends.. put it up there to save room in the tent

. thinking about placing the hyper fan in the attic too and just running a duct into the tent.

i have a controller and going to run the controller into the tent (very long).

i did adjust the level on the controller but the sound of the fan is still too loud for me, hence the idea to take it into the attic instead

Click to expand...

Ah right, I'm not that familiar with those inline filters, but yeah all sounds good.
If the controller isn't a variable transformer which switches the voltage then that could be making the noise worse as some fans hum when turned down with those other types of speed controller. Basically if it isn't the weight of a house brick it probably not a variable transformer.
If that's the case then the noise created is a low hz sound and is almost impossible to sound proof. But by all means try and put the fan on the loft and see if it helps. Your plan sounds reasonable.

Thanks for your input... Fan efficiency shouldn't be affected by a few extra feet of ducting from the input is what i'm hoping.. it's definitely a task to get it accomplished but should be worth it.

the controller is light as a feather and has an extra long cord which is convenient

chooselove said:

Thanks for your input... Fan efficiency shouldn't be affected by a few extra feet of ducting from the input is what i'm hoping.. it's definitely a task to get it accomplished but should be worth it.

the controller is light as a feather and has an extra long cord which is convenient

Click to expand...

It will be effected but not by too much, those types of fans suffer the most loss on the first meter of duct and few bends. After about 4m there isn't as much drop off.
Theres some good fan tests on youtube which show the exact numbers and I'm sure the hyper is amongst the ones they test.
A quick search and it should be easy to find if your interested.

As for the speed controller. If all else fails you can always resort to upgrading to a variac if needed. Best £50 I ever spent as far as lowering noise.

coreywebster said:

It will be effected but not by too much, those types of fans suffer the most loss on the first meter of duct and few bends. After about 4m there isn't as much drop off.
Theres some good fan tests on youtube which show the exact numbers and I'm sure the hyper is amongst the ones they test.
A quick search and it should be easy to find if your interested.

As for the speed controller. If all else fails you can always resort to upgrading to a variac if needed. Best £50 I ever spent as far as lowering noise.

Click to expand...

I'll definitely search for the video thanks... 1m = 3.2 feet, so going to be keeping that in mind. I'm pretty sure it's the fan itself and not the controller.. though i wouldnt be surprised. When i run it without the controller, its still loud, of course bc it's at full speed...