Need to upgrade tent size, question about ventilation

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nygaff1

Well-Known Member
Hi all,

I currently have a 5x5 with an AC Infinity 8" exhaust with oversized 8" XL carbon filter. I have a 6" intake hooked to an inline HEPA filter box. Both are outside the tent and have at least one 90° bend. I try not to run them past speed 3 as past this point the sound reverberates upstairs to my main living area.

I need to upgrade to a 4x8 instead, so roughly 25% more cubic feet. My question is can I keep this setup with the larger tent at the same speed (is this enough air exchange?) Or do I need to upgrade to a 10" exhaust? I get a little confused with the cfm ratings once filters are added, especially when using mismatched sizes at reduced speeds.

Any help is appreciated!
 
Fallguy111

Fallguy111

Well-Known Member
If you only go as high as 3 now then it should work fine. Any bends in flexible duct can cause noise/whistling. Here's an idea, suspend fan from ceiling above tent, box around with cardboard and insulation too greatly reduce noise. I like my AC infinity fans but if I only had one and depended on it I'd definitely get a back up. Good luck
 
bk78

bk78

Well-Known Member
nygaff1 said:
Yes but will I be able to keep them at speed 3/10?
Click to expand...
Do you run A/c, dehumidifier etc?

What lights? How many plants?


Assuming you will be doubling your light output you have currently with the bigger space?
 
N

nygaff1

Well-Known Member
Fallguy111 said:
If you only go as high as 3 now then it should work fine. Any bends in flexible duct can cause noise/whistling. Here's an idea, suspend fan from ceiling above tent, box around with cardboard and insulation too greatly reduce noise. I like my AC infinity fans but if I only had one and depended on it I'd definitely get a back up. Good luck
Click to expand...
Unfortunately there's no space between the top of the tent and the floor joists. Rigid ducting is definitely a good idea.
 
N

nygaff1

Well-Known Member
bk78 said:
Do you run A/c, dehumidifier etc?

What lights? How many plants?


Assuming you will be doubling your light output you have currently with the bigger space?
Click to expand...
No AC, this summer was... challenging. Dehumidifier in the lung room and I run a humidifier in the tent at times.

I currently run a 480w QB and two 240s, which isn't the best footprint but it's what ive been able to piece together. I'd probably add another 600w or so.
 
coreywebster

coreywebster

Well-Known Member
nygaff1 said:
No AC, this summer was... challenging. Dehumidifier in the lung room and I run a humidifier in the tent at times.

I currently run a 480w QB and two 240s, which isn't the best footprint but it's what ive been able to piece together. I'd probably add another 600w or so.
Click to expand...
Well all things being
equal it will stay the same.

Your lighting suits your new space better anyway
 
Nizza

Nizza

Well-Known Member
I think that you could make some small changes to be able to make that fan still quiet on a higher speed. Lets see some pictures of the setup??
 
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